Imaging-capturing and light-sensing optical apparatus

Abstract

An image-capturing and light-sensing optical apparatus has both of an image capturing function and a light sensing function. The image-capturing and light-sensing optical apparatus includes a first optical lens module, a second optical lens module and a casing. The casing has a first opening. The first optical lens module includes a first optical lens and a first optical sensor. According to the working distance or the equivalent focal length of the first optical lens module, the size of the first optical lens and the size of the first optical sensor, the maximum field of view is acquired. Consequently, the size of the first opening is determined, and the casing is slim. Under this circumstance, the image-capturing and light-sensing optical apparatus complies with the purpose of miniaturization.

Claims

1. An image-capturing and light-sensing optical apparatus with both of an image capturing function and a sensing function, the image-capturing and light-sensing optical apparatus comprising: a first optical lens module receiving an ambient light, thereby capturing an image; a second optical lens module located beside the first optical lens module, and sensing the ambient light; and a casing supporting portions of the first optical lens module and the second optical lens module, and comprising a first opening and a second opening, wherein the first optical lens module is partially exposed outside through the first opening, and the second optical lens module is partially exposed outside through the second opening, wherein the first optical lens module comprises: a first optical lens fixed on the casing and exposed outside the first opening, wherein the ambient light is allowed to pass through the first optical lens, and the first optical lens has a first viewing zone; and a first optical sensor aligned with the first optical lens, wherein after the ambient light passing through the first optical lens is received by the first optical sensor, the image is acquired by the first optical sensor, wherein a size of the first opening is determined according to a first working distance or a first equivalent focal length of the first optical lens module, a first field of view and a size of the first optical sensor.

2. The image-capturing and light-sensing optical apparatus according to claim 1, wherein if the first viewing zone of the first optical lens is circular or nearly-circular and an object to be captured is near the first optical lens module, the size of the first opening satisfies mathematic formulae:
R.sub.aMW.sub.M.Math.tan .sub.MR.sub.sM, and R.sub.aMR*.sub.aM, wherein if the first viewing zone of the first optical lens is circular or nearly-circular and the object to be captured is far from the first optical lens module, the size of the first opening satisfies mathematic formulae:
R.sub.aMf.sub.M.Math.tan .sub.MR.sub.sM, and R.sub.aMR*.sub.aM, wherein R*.sub.aM is a radius of the first opening, W.sub.M is a first working distance of the first optical lens module, R.sub.aM is a radius of the first optical lens, .sub.M is a first field angle (and hence determines the first field of view) of the first optical lens, R.sub.sM is a radius of the first optical sensor, and f.sub.M is a first equivalent focal length of the first optical lens module.

3. The image-capturing and light-sensing optical apparatus according to claim 1, wherein if the first viewing zone of the first optical lens is rectangular or nearly-rectangular and an object to be captured is near the first optical lens module, the size of the first opening satisfies mathematic formulae:
R.sub.aM,xW.sub.M.Math.tan .sub.M,xR.sub.sM,x, R.sub.aM,xR*.sub.aM,x;
R.sub.aM,yW.sub.M.Math.tan .sub.M,yR.sub.sM,y, R.sub.aM,yR*.sub.aM,y; wherein if the first viewing zone of the first optical lens is rectangular or nearly-rectangular and the object to be captured is far from the first optical lens module, the size of the first opening satisfies mathematic formulae:
R.sub.aM,xf.sub.M.Math.tan .sub.M,xR.sub.sM,x, R.sub.aM,xR*.sub.aM,x;
R.sub.aM,yf.sub.M.Math.tan .sub.M,yR.sub.sM,y, R.sub.aM,yR*.sub.aM,y; wherein R*.sub.aM,x is a half length of the first opening along a first direction, R*.sub.aM,y is a half length of the first opening along a second direction, W.sub.M is a first working distance of the first optical lens module, R.sub.aM,x is a half length of the first optical lens along the first direction, R.sub.aM,y is a half length of the first optical lens along the second direction, .sub.M,xis the first field angle of the first optical lens along the first direction, .sub.M,y is the first field angle of the first optical lens along the second direction, R.sub.sM,x is a half length of the first optical sensor along the first direction, R.sub.sM,y is a half length of the first optical sensor along the second direction, and f.sub.M is a first equivalent focal length of the first optical lens module.

4. The image-capturing and light-sensing optical apparatus according to claim 1, wherein the second optical lens module comprises: a second optical lens located beside the first optical lens, fixed on the casing, and exposed outside the second opening, wherein the ambient light is allowed to pass through the second optical lens, and the second optical lens has a second viewing zone; a second optical sensor aligned with the second optical lens, wherein after the ambient light passing through the second optical lens is received by the second optical sensor, the ambient line is sensed by the second optical sensor, wherein a pixel size of the second optical sensor is smaller than a pixel size of the first optical sensor; and a light guide element arranged between the second optical lens and the second optical sensor, wherein the ambient light passing through the second optical lens is guided to the second optical sensor by the light guide element, wherein a size of the second opening is determined according to a second working distance or a second equivalent focal length of the second optical lens module, a second field of view and a size of a first surface of the light guide element.

5. The image-capturing and light-sensing optical apparatus according to claim 4, wherein if the second viewing zone of the second optical lens is circular or nearly-circular and an object to be sensed is near the second optical lens module, the size of the second opening satisfies mathematic formulae:
R.sub.aAW.sub.A.Math.tan .sub.AR.sub.LA, and R.sub.aAR*.sub.aA, wherein if the second viewing zone of the second optical lens is circular or nearly-circular and the object to be sensed is far from the second optical lens module, the size of the second opening satisfies mathematic formulae:
R.sub.aAf.sub.A.Math.tan .sub.AR.sub.LA, and R.sub.aAR*.sub.aA, wherein R*.sub.aA is a radius of the second opening, W.sub.A is a second working distance of the second optical lens module, R.sub.aA is a radius of the second optical lens, .sub.LA is a second field angle (and hence determines the second field of view) of the second optical lens, R.sub.LA is a radius of the first surface of the light guide element, and f.sub.A is a second equivalent focal length of the second optical lens module.

6. The image-capturing and light-sensing optical apparatus according to claim 4, wherein if the second viewing zone of the second optical lens is rectangular or nearly-rectangular and an object to be sensed is near the second optical lens module, the size of the second opening satisfies mathematic formulae:
R.sub.aA,xW.sub.A.Math.tan .sub.A,xR.sub.LA,x, R.sub.aA,xR*.sub.aA,x,
R.sub.aA,yW.sub.A.Math.tan .sub.A,yR.sub.LA,y, R.sub.aA,yR*.sub.aA,y, wherein if the second viewing zone of the second optical lens is rectangular or nearly-rectangular and the object to be sensed is far from the second optical lens module, the size of the second opening satisfies mathematic formulae:
R.sub.aA,xf.sub.A.Math.tan .sub.A,xR.sub.LA,x, R.sub.aA,xR*.sub.aA,x;
R.sub.aA,yf.sub.A.Math.tan .sub.A,yR.sub.LA,y, R.sub.aA,yR*.sub.aA,y; wherein R*.sub.aA,x is a half length of the second opening along a first direction, R*.sub.aA,y is a half length of the second opening along a second direction, W.sub.A is a second working distance of the second optical lens module, R.sub.aA,x is a half length of the second optical lens along the first direction, R.sub.aA,y is a half length of the second optical lens along the second direction, .sub.A,x is the second field angle of the second optical lens along the first direction, .sub.A,y is the second field angle of the second optical lens along the second direction, R.sub.LA, x is a half length of the first surface of the light guide element along the first direction, R.sub.LA,y is a half length of the first surface of the light guide element along the first direction, and f.sub.A is a second equivalent focal length of the second optical lens module.

7. The image-capturing and light-sensing optical apparatus according to claim 4, wherein if the first field of view is larger than the second field of view, a first distance corresponding to the first field of view is shorter than a second distance corresponding to the second field of view, wherein the first distance is a distance between the first optical lens and a first turning point corresponding to the first field of view, and the second distance is a distance between the second optical lens and a second turning point corresponding to the second field of view.

8. The image-capturing and light-sensing optical apparatus according to claim 4, wherein an included angle between the first surface of the light guide element and a second surface of the light guide element is smaller than 10 degrees, wherein the first surface of the light guide element is closer to the second optical lens, and the second surface of the light guide element is closer to the second optical sensor.

9. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first surface of the light guide element and a second surface of the light guide element are not in parallel with each other, and one of a first normal vector of the first surface and a second normal vector of the second surface is in parallel with an optical axis of the second optical lens module, wherein the first surface of the light guide element is closer to the second optical lens, and the second surface of the light guide element is closer to the second optical sensor.

10. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first surface of the light guide element and a second surface of the light guide element are not in parallel with each other, and an included angle between a first normal vector of the first surface and an optical axis of the second optical lens module and/or an included angle between a second normal vector of the second surface and the optical axis of the second optical lens module are smaller than 60 degrees, wherein the first surface of the light guide element is closer to the second optical lens, and the second surface of the light guide element is closer to the second optical sensor.

11. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the light guide element is a solid plastic tube with light-guiding directivity, a hollow tube with light-guiding directivity, a microstructure with light-guiding directivity or a metallic reflective surface with light-guiding directivity and reflectivity in which the polarization of light is also selected.

12. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first optical lens and the second optical lens are integrally formed on a transparent structure, and the transparent structure has the first viewing zone and the second viewing zone.

13. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first optical lens is a lens with the corresponding first viewing zone, and the second optical lens is a lens with the corresponding second viewing zone.

14. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first optical sensor and the second optical sensor are located at the same plane, and the first optical sensor and the second optical sensor are integrated with each other.

15. The image-capturing and light-sensing optical apparatus according to claim 4, wherein the first optical sensor and the second optical sensor are stand-alone, and located at different planes.

16. The image-capturing and light-sensing optical apparatus according to claim 1, further comprising a moving mechanism, wherein the moving mechanism is disposed within the casing to move the casing, so that the first optical lens module performs an auto-focusing operation, wherein the moving mechanism moves the casing in an electrically driving manner, a magnetically driving manner, an optically sensing manner or a manual manner.

17. The image-capturing and light-sensing optical apparatus according to claim 1, wherein the ambient light sensed by the second optical lens module includes the light beams in a first wavelength range, the light beams in a second wavelength range and/or the light beams in a thermal band.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic cross-sectional side view illustrating a conventional image capturing device;

(2) FIG. 2 is a schematic perspective view illustrating the outer appearance of an image-capturing and light-sensing optical apparatus according to a first embodiment of the present invention;

(3) FIG. 3 is a schematic cross-sectional view illustrating a portion of the image-capturing and light-sensing optical apparatus of FIG. 2 and taken along the line F;

(4) FIG. 4 schematically illustrating a first viewing zone and a second viewing zone of the image-capturing and light-sensing optical apparatus according to the first embodiment of the present invention;

(5) FIG. 5A is a schematic cross-sectional side view illustrating a portion of an image-capturing and light-sensing optical apparatus according to a second embodiment of the present invention and along a first direction;

(6) FIG. 5B is a schematic cross-sectional side view illustrating the first optical lens module of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention and along a second direction;

(7) FIG. 5C is a schematic cross-sectional side view illustrating the second optical lens module of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention and along the second direction;

(8) FIG. 6 schematically illustrating a first viewing zone and a second viewing zone of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention; and

(9) FIGS. 7A7F are schematic top views illustrating some examples of the arrangement of plural optical lenses of the image-capturing and light-sensing optical apparatus.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(10) For overcoming the drawbacks of the conventional technologies, the present invention provides an image-capturing and light-sensing optical apparatus.

(11) Please refer to FIGS. 2, 3 and 4. FIG. 2 is a schematic perspective view illustrating the outer appearance of an image-capturing and light-sensing optical apparatus according to a first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view illustrating a portion of the image-capturing and light-sensing optical apparatus of FIG. 2 and taken along the line F. FIG. 4 schematically illustrating a first viewing zone and a second viewing zone of the image-capturing and light-sensing optical apparatus according to the first embodiment of the present invention. The image-capturing and light-sensing optical apparatus 2 comprises a first optical lens module 21, a second optical lens module 22, a third optical lens module 23, a fourth optical lens module 24, a fifth optical lens module 25, a casing 26 and a moving mechanism 27. The casing 26 comprises a first opening 261 corresponding to the first optical lens module 21, a second opening 262 corresponding to the second optical lens module 22, a third opening 263 corresponding to the third optical lens module 23, a fourth opening 264 corresponding to the fourth optical lens module 24, and a fifth opening 265 corresponding to the fifth optical lens module 25.

(12) The first optical lens module 21 is located at a center of the casing 26. The first optical lens module 21 comprises a first optical lens 211 and a first optical sensor 212. The first optical lens 211 has a first optical axis A1, a first field angle .sub.M and a first viewing zone V1. The first optical lens 211 is fixed on the casing 26 and exposed outside through the first opening 261, so that the ambient light L is allowed to pass through the first optical lens 211. The first optical sensor 212 is aligned with the first optical lens 211. After the ambient light L passing through the first optical lens 211 is received by the first optical sensor 212, a corresponding image is acquired. In this embodiment, the first field angle .sub.M is the maximum field angle, and hence the FOV, corresponding to the first optical lens 211.

(13) The second optical lens module 22 is located beside the first optical lens module 21. In this embodiment, the second optical lens module 22 comprises a second optical lens 221, a second optical sensor 222 and a light guide element 223. The second optical lens 221 has a second optical axis A2, a second field angle .sub.A and a second viewing zone V2. The second optical lens 221 is fixed on the casing 26 and exposed outside through the second opening 262, so that the ambient light L is allowed to pass through the second optical lens 221. The second optical sensor 222 is aligned with the second optical lens 221. After the ambient light L passes through the second optical lens 221, the ambient light L is received by the second optical sensor 222. Consequently, the second optical sensor 222 can perform a sensing operation (e.g., the operation of sensing the gesture). The light guide element 223 is arranged between the second optical lens 221 and the second optical sensor 222. By the light guide element 223, the ambient light L passing through the second optical lens 221 is guided to the second optical sensor 222. In this embodiment, the second field angle .sub.A is the maximum field angle, and hence the FOV, corresponding to the second optical lens 221.

(14) The third optical lens module 23, the fourth optical lens module 24 and the fifth optical lens module 25 are also located beside the first optical lens module 21. The structures and functions of the third optical lens module 23, the fourth optical lens module 24 and the fifth optical lens module 25 are substantially identical to those of the second optical lens module 22, and are not redundantly described herein. In accordance with the present invention, the pixel size for each of the second optical sensor 222 and the optical sensors of the third optical lens module 23, the fourth optical lens module 24 and the fifth optical lens module 25 is smaller or much smaller than the pixel size of the first optical sensor 212. For example, the pixel size of the first optical sensor 212 is about several millions of pixels, and the pixel size of each optical sensor of the optical lens modules 2225 is about 12 sensing set(s) with n*m pixel array (n1,m1). The pixel sizes of these optical sensors are presented herein for purpose of illustration and description only.

(15) As shown in FIG. 2, the first optical lens module 21 is a center optical lens module, and the second optical lens module 22, the third optical lens module 23, the fourth optical lens module 24 and the fifth optical lens module 25 are peripheral optical lens modules around the center optical lens module. Moreover, as shown in FIG. 3, the moving mechanism 27 is disposed within the casing 26. The moving mechanism 27 is used for moving the casing 26. As the casing 26 is moved, the first optical lens 211 is correspondingly moved to perform an auto-focusing operation. The moving mechanism 27 can move the casing 26 in an electrically driving manner, a magnetically driving manner, an optically sensing manner or a manual manner.

(16) In an embodiment, the first optical lens 211, the second optical lens 221 and the optical lenses of the third optical lens module 23, the fourth optical lens module 24 and the fifth optical lens module 25 have circular shapes and are on stand-alone lenses. Consequently, as shown in FIG. 4, the first viewing zone V1, the second viewing zone V2, a third viewing zone (not shown), a fourth viewing zone (not shown) and a fifth viewing zone (not shown) corresponding to these optical lenses also have circular shapes. It is noted that numerous modifications and alterations may be made while retaining the teachings of the invention. For example, in another embodiment, the first optical lens, the second optical lens and the optical lenses of the third optical lens module, the fourth optical lens module and the fifth optical lens module are formed on the same transparent structure and integrated with each other.

(17) In an embodiment, the light guide elements of the optical lens modules 2225 are solid plastic tubes. Moreover, the ambient light L includes the light beams in a first wavelength range, the light beams in a second wavelength range and/or the light beams in a thermal band. For example, the light beams in the first wavelength range are visible beams, the light beams in the second wavelength range are invisible beams, and the light beams in the thermal band are light beams from a thermal source.

(18) The following aspects should be specially described. Firstly, each of the above lenses is made of a plastic material, a glass material or a silicon-based material. Secondly, the light guide element 223 is not restricted to the solid plastic tube. For example, in another embodiment, the light guide element 223 is a hollow tube, a structure having microstructures with light-guiding directivity, or a structure with a metallic reflective surface. Thirdly, in an embodiment, the first optical sensor 212 and the second optical sensor 222 are located at the same plane, but the first optical sensor 212 and the second optical sensor 222 are stand-alone. In another embodiment, the first optical sensor and the second optical sensor are located at the same plane, and the first optical sensor and the second optical sensor are integrated with each other. Alternatively, the first optical sensor and the second optical sensor are stand-alone, and the first optical sensor and the second optical sensor are located at different planes.

(19) Fourthly, as shown in FIG. 3, an included angle between a first surface 2231 of the light guide element 223 and a second surface 2232 of the light guide element 223 is smaller than 10 degrees. Preferably, the first surface 2231 of the light guide element 223 and the second surface 2232 of the light guide element 223 are in parallel with each other. The first surface 2231 of the light guide element 223 is closer to the second optical lens 221, and the second surface 2232 of the light guide element 223 is closer to the second optical sensor 222. Moreover, in case that the first surface 2231 and the second surface 2232 are not in parallel with each other, the image-capturing and light-sensing optical apparatus 2 has one of the following configurations. In the first configuration, one of a first normal vector N1 of the first surface 2231 and a second normal vector N2 of the second surface 2232 is in parallel with a second optical axis A2 of the second optical lens module 22. In the second configuration, the included angle between the first normal vector N1 of the first surface 2231 and the second optical axis A2 of the second optical lens module 22 and/or the included angle between the second normal vector N2 of the second surface 2232 and the second optical axis A2 of the second optical lens module 22 are smaller than 60 degrees. Preferably, both of the first normal vector N1 and the second normal vector N2 are in parallel with the optical axis A2.

(20) Please refer to FIG. 3. In case that the first field of view which is corresponding to field angle .sub.M is larger than the second field of view where the filed angle .sub.A, a first distance T.sub.M1 corresponding to the first field angle .sub.M is shorter than a second distance T.sub.A1 corresponding to the second field angle .sub.A. Moreover, the first distance T.sub.M1 is the distance between the first optical lens 211 and a first turning point P1 corresponding to the first field angle .sub.M, and the second distance T.sub.A1 is the distance between the second optical lens 221 and a second turning point P2 corresponding to the second field angle .sub.A.

(21) The way of designing the sizes of the openings 261265 of the casing 26 will be illustrated as follows. Take the first opening 261 and the second opening 262 as examples. Please refer to FIG. 3 again. In an embodiment, the size of the first opening 261 is determined according to a first working distance W.sub.M of the first optical lens module 21, the first field angle .sub.M and the size of the first optical sensor 212. In another embodiment, the size of the first opening 261 is determined according to a first equivalent focal length f.sub.M of the first optical lens module 21, the first field angle .sub.M and the size of the first optical sensor 212. In case that the first viewing zone V1 of the first optical lens 211 is circular and the object to be captured is near the first optical lens module 21, the size of the first opening 261 satisfies the following mathematic formulae:
R.sub.aMW.sub.M.Math.tan .sub.MR.sub.sM, and R.sub.aMR*.sub.aM

(22) In case that the first viewing zone V1 of the first optical lens 211 is circular and the object to be captured is far from the first optical lens module 21, the size of the first opening 261 satisfies the following mathematic formulae:
R.sub.aMf.sub.M.Math.tan .sub.MR.sub.sM, and R.sub.aMR*.sub.aM

(23) In the above mathematic formulae, R*.sub.aM is the radius of the first opening 261, W.sub.M is the first working distance of the first optical lens module 21 (i.e., the sum of the first distance T.sub.M1 and the second distance T.sub.M2), R.sub.aM is the radius of the first optical lens 211, .sub.M is the first field angle of the first optical lens 211, R.sub.sM is the radius of the first optical sensor 212, and f.sub.M is the first equivalent focal length of the first optical lens module 21.

(24) In an embodiment, the size of the second opening 262 is determined according to a second working distance W.sub.A of the second optical lens module 22, the second field angle .sub.A and the size of the second optical sensor 222 of the second optical lens module 22. In another embodiment, the size of the second opening 262 is determined according to a second equivalent focal length f.sub.A of the second optical lens module 22, the second field angle .sub.A and the size of the second optical sensor 222 of the second optical lens module 22. In case that the second viewing zone V2 of the second optical lens 221 is circular and the object to be sensed is near the second optical lens module 22, the size of the second opening 262 satisfies the following mathematic formulae:
R.sub.aAW.sub.A.Math.tan .sub.AR.sub.LA, and R.sub.aAR*.sub.aA

(25) In case that the second viewing zone V2 of the second optical lens 221 is circular and the object to be sensed is far from the second optical lens module 22, the size of the second opening 262 satisfies the following mathematic formulae:
R.sub.aAf.sub.A.Math.tan .sub.AR.sub.LA, and R.sub.aAR*.sub.aA

(26) In the above mathematic formulae, R*.sub.aA is the radius of the second opening 262, W.sub.A is the second working distance of the second optical lens module 22 (i.e., the sum of a second distance T.sub.A1 and a fourth distance T.sub.A2), R.sub.aA is the radius of the second optical lens 221, .sub.A is the second field angle of the second optical lens 221, R.sub.LA is the radius of the first surface 2231 of the light guide element 223, and f.sub.A is the second equivalent focal length of the second optical lens module 22.

(27) The present invention further provides a second embodiment, which is distinguished from the first embodiment. FIG. 5A is a schematic cross-sectional side view illustrating a portion of an image-capturing and light-sensing optical apparatus according to a second embodiment of the present invention and along a first direction. FIG. 5B is a schematic cross-sectional side view illustrating the first optical lens module of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention and along a second direction. FIG. 5C is a schematic cross-sectional side view illustrating the second optical lens module of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention and along the second direction. FIG. 6 schematically illustrating a first viewing zone and a second viewing zone of the image-capturing and light-sensing optical apparatus according to the second embodiment of the present invention. Please refer to FIGS. 5A, 5B, 5C and 6. The image-capturing and light-sensing optical apparatus 3 comprises a first optical lens module 31, a second optical lens module 32, a third optical lens module (not shown), a fourth optical lens module (not shown), a fifth optical lens module (not shown), a casing 36 and a moving mechanism 37. The casing 36 comprises a first opening 361 corresponding to the first optical lens module 31, a second opening 362 corresponding to the second optical lens module 32, a third opening (not shown) corresponding to the third optical lens module, a fourth opening (not shown) corresponding to the fourth optical lens module, and a fifth opening (not shown) corresponding to the fifth optical lens module. In comparison with the image-capturing and light-sensing optical apparatus 2 of the first embodiment, the structures of the first optical lens module, the second optical lens module, the third optical lens module, the fourth optical lens module and the fifth optical lens module of the image-capturing and light-sensing optical apparatus 3 of this embodiment are distinguished. The other components of the image-capturing and light-sensing optical apparatus 3 are similar to those of the image-capturing and light-sensing optical apparatus 2, and are not redundantly described herein.

(28) In FIG. 5A, the structures of the first optical lens module 31 and the second optical lens module 32 along the first direction are shown. The first optical lens module 31 comprises a first optical lens 311 and a first optical sensor 312. The first optical lens 311 has a first optical axis Al, a first field angle .sub.M,x (and hence the corresponding FOV) along the first direction, a first field angle .sub.M,y along the second direction, and a first viewing zone V3. In this embodiment, as shown in FIG. 6, the first optical lens 311 and the first viewing zone V3 are rectangular. In this embodiment, the second optical lens module 32 comprises a second optical lens 321, a second optical sensor 322 and a light guide element 323. The second optical lens 321 has a second optical axis A2, a second field ange .sub.A,x along the first direction, a second field angle .sub.A,y along the second direction, and a second viewing zone V4. The second optical lens 321 and the second viewing zone V4 are also rectangular. In this embodiment, the light guide element 323 is a free-type light guide element. Moreover, a metallic reflective structure (not shown) is formed on an inner surface of the light guide element 323 for facilitating guiding the ambient light L.

(29) In an embodiment, the size of the first opening 361 is determined according to a first working distance W.sub.M of the first optical lens module 31, the first field of view along the first direction (specified by the field angle .sub.M,x), the first field of view along the second direction (specified by the field angle .sub.M,y), and the size of the first optical sensor 312. In another embodiment, the size of the first opening 361 is determined according to a first equivalent focal length f.sub.M of the first optical lens module 31, the first field angle .sub.M, along the first direction, the first field angle .sub.M,y along the second direction, and the size of the first optical sensor 312. In case that the first viewing zone V3 of the first optical lens 311 is rectangular and the object to be captured is near the first optical lens module 31, the size of the first opening 361 satisfies the following mathematic formulae:
R.sub.aM,xW.sub.M.Math.tan .sub.M,xR.sub.sM,x, R.sub.aM,xR*.sub.aM,x;
R.sub.aM,yW.sub.M.Math.tan .sub.M,yR.sub.sM,y, R.sub.aM,yR*.sub.aM,y.

(30) In case that the first viewing zone V3 of the first optical lens 311 is rectangular and the object to be captured is far from the first optical lens module 31, the size of the first opening 361 satisfies the following mathematic formulae:
R.sub.aM,xf.sub.M.Math.tan .sub.M,xR.sub.sM,x, R.sub.aM,xR*.sub.aM,x;
R.sub.aM,yf.sub.M.Math.tan .sub.M,yR.sub.sM,y, R.sub.aM,yR*.sub.aM,y;

(31) In the above mathematic formulae, R*.sub.aM,x is the half length of the first opening 361 along the first direction, R*.sub.aM,y is the half length of the first opening 361 along the second direction, W.sub.M is the first working distance of the first optical lens module 31 (i.e., the sum of the first distance T.sub.M1 and the second distance T.sub.M2), R.sub.aM,x is the half length of the first optical lens 311 along the first direction, R.sub.aM,y is the half length of the first optical lens 311 along the second direction, .sub.M,x is the first field angle of the first optical lens 311 along the first direction, .sub.M,y is the first field angle of the first optical lens 311 along the second direction, R.sub.sM,x is the half length of the first optical sensor 312 along the first direction, R.sub.sM,y is the half length of the first optical sensor 312 along the second direction, and f.sub.M is the first equivalent focal length of the first optical lens module 31.

(32) In an embodiment, the size of the second opening 362 is determined according to a second working distance W.sub.A of the second optical lens module 32, the second field angle .sub.A,x along the first direction, the second field angle .sub.A,y along the second direction, and the size of the second optical sensor 322 of the second optical lens module 32. In another embodiment, the size of the second opening 362 is determined according to a second equivalent focal length f.sub.A of the second optical lens module 32, the second field angle .sub.A,x along the first direction, the second field angle .sub.A,y along the second direction, and the size of the second optical sensor 322 of the second optical lens module 32. In case that the second viewing zone V4 of the second optical lens 321 is rectangular and the object to be sensed is near the second optical lens module 32, the size of the second opening 362 satisfies the following mathematic formulae:
R.sub.aA,xW.sub.A.Math.tan .sub.A,xR.sub.LA,x, R .sub.aA,xR*.sub.aA,x;
R.sub.aA,yW.sub.A.Math.tan .sub.A,yR.sub.LA,y, R .sub.aA,yR*.sub.aA,y.

(33) In case that the second viewing zone V4 of the second optical lens 321 is rectangular and the object to be sensed is far from the second optical lens module 32, the size of the second opening 362 satisfies the following mathematic formulae:
R.sub.aA,xf.sub.A.Math.tan .sub.A,xR.sub.LA,x, R.sub.aA,xR*.sub.aA,x;
R.sub.aA,yf.sub.A.Math.tan .sub.A,yR.sub.LA,y, R.sub.aA,yR*.sub.aA,y,

(34) In the above mathematic formulae, R*.sub.aA,x is i s the half length of the second opening 362 along the first direction, W.sub.aA,y is the half length of the second opening 362 along the second direction, W.sub.A is the second working distance of the second optical lens module 32 (i.e., the sum of a second distance T.sub.A1 and a fourth distance T.sub.A2), R.sub.aA,x is the half length of the second optical lens 321 along the first direction, R.sub.aA,y is the half length of the second optical lens 321 along the second direction, .sub.A,x is the second field angle of the second optical lens 321 along the first direction, .sub.A,y is the second field angle of the second optical lens 321 along the second direction, R.sub.LA,x is the half length of a first surface 3231 of the light guide element 323 along the first direction, R.sub.LA,y is the half length of the first surface 3231 of the light guide element 323 along the second direction, and f.sub.A is the second equivalent focal length of the second optical lens module 32.

(35) It is noted that numerous modifications and alterations may be made while retaining the teachings of the invention. FIGS. 7A7F are schematic top views illustrating some examples of the arrangement of plural optical lenses of the image-capturing and light-sensing optical apparatus.

(36) As shown in FIG. 7A, a first optical lens 411, a second optical lens 412, a third optical lens 413, a fourth optical lens 414 and a fifth optical lens 415 are integrally formed on the same transparent structure, and the second optical lens 412, the third optical lens 413, the fourth optical lens 414 and the fifth optical lens 415 are arranged around the first optical lens 411. The optical lens module corresponding to the first optical lens 411 has an image-capturing function, and the optical lens modules corresponding to the second optical lens 412, the third optical lens 413, the fourth optical lens 414 and the fifth optical lens 415 have sensing functions.

(37) Some other examples of the arrangement of plural optical lenses are shown in FIGS. 7B7F. In FIG. 7B, two optical lens are integrally formed with each other. In FIGS. 7C and 7D, three optical lenses are integrally formed with each other. In FIGS. 7E and 7F, four optical lenses are integrally formed with each other.

(38) From above descriptions, the present invention provides an image-capturing and light-sensing optical apparatus. The above mathematic formulae can be used to determine the maximum field of view and generate the maximum viewing zone according to the size of the first optical lens, the size of the second optical lens, the size of the first optical sensor and the size of the light guide element. Moreover, the sizes of the corresponding openings of the casing are determined according to the sizes of these optical lenses. Since the image-capturing and light-sensing optical apparatus is designed according to the above mathematic formulae, the field of view is larger and the casing is slimmer. Under this circumstance, the image-capturing and light-sensing optical apparatus complies with the purpose of miniaturization. Consequently, the image-capturing and light-sensing optical apparatus of the present invention can be applied to a portable electronic device such as a smart phone, a tablet computer or a wearable device. It should be understood that although the conditions specified in this document are in terms of field angle (field of view), it can be deduced for a near-by object with specified imaging area A (or sensing area) at a specified distance D the correspondence mainly follows

(39) $\tan \left(\mathrm{field}\mathrm{angle}\right)\frac{\sqrt{\mathrm{imaging}\mathrm{area}A}}{\sqrt{}*D}$

(40) While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.