A lens module, constructed to include all necessary filters but retaining its wide-angle characteristic and short focal length, is comprised of a housing, a cover plate, and a filter switcher. The housing and the cover plate form a receiving cavity, the cavity containing the filter switcher. The filter switcher includes holder, two mounting frames, two first adhesive layers, and two filters, and is of minimal thickness. The two first adhesive layers fix the filters on the two mounting frames. An enlarged installation space within the lens module is not required. The disclosure also relates to an electronic device using the lens module.

Provided is a camera optical lens including first to fourth lenses. The camera optical lens satisfies: 0.10≤R1/R2≤0.20; 1.10≤R3/R4≤1.50; 5.50≤R5/R6≤6.50; and −6.50≤f2/f≤−4.50, where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; R1 denotes a curvature radius of an object side surface of the first lens; R2 denotes a curvature radius of an image side surface of the first lens; R3 denotes a curvature radius of an object side surface of the second lens; R4 denotes a curvature radius of an image side surface of the second lens; R5 denotes a curvature radius of an object side surface of the third lens; and R6 denotes a curvature radius of an image side surface of the third lens. The camera optical lens has good optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

There is provided herein an optical system for a tip section of a multi-sensor endoscope, the system comprising: a front-pointing camera sensor; a front objective lens system; a side-pointing camera sensor; and a side objective lens system, wherein at least one of said front and side objective lens systems comprises a front and a rear sub-systems separated by a stop diaphragm, said front sub-system comprises, in order from the object side, a first front negative lens and a second front positive lens, said rear sub-system comprises, in order from the object side, a first rear positive lens, an achromatic sub-assembly comprising a second rear positive lens and a third rear negative lens, wherein the following condition is satisfied: f.sub.(first rear positive lens)≤1.8f, where f is the composite focal length of the total lens system and f.sub.(first rear positive lens) is the focal length of said first rear positive lens.

There is provided herein an optical system for a tip section of a multi-sensor endoscope, the system comprising: a front-pointing camera sensor; a front objective lens system; a side-pointing camera sensor; and a side objective lens system, wherein at least one of said front and side objective lens systems comprises a front and a rear sub-systems separated by a stop diaphragm, said front sub-system comprises, in order from the object side, a first front negative lens and a second front positive lens, said rear sub-system comprises, in order from the object side, a first rear positive lens, an achromatic sub-assembly comprising a second rear positive lens and a third rear negative lens, wherein the following condition is satisfied: f.sub.(first rear positive lens)≤1.8f, where f is the composite focal length of the total lens system and f.sub.(first rear positive lens) is the focal length of said first rear positive lens.

A reflector arrangement for position determination and/or marking of target points, comprising a retroreflector and a first sensor arrangement, by means of which the orientation measurement radiation passing through the retroreflector is acquirable. The first sensor arrangement comprises a first optical assembly providing a fisheye lens, and a first sensor, wherein the retroreflector and the first sensor arrangement are arranged in such a way that orientation measurement radiation passing through the retroreflector is projectable onto the detection surface of the first sensor by means of the first optical assembly.

A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group having negative refractive power and a rear lens group; upon varying a magnification from a wide angle end state to a telephoto end state, a distance between the first lens group and the first intermediate lens group being varied, a distance between the first intermediate lens group and the second intermediate lens group being varied, and a distance between the second intermediate lens group and the rear lens group being varied; the rear lens group comprising at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object; and predetermined conditional expressions being satisfied, thereby the focusing lens group(s) being reduced in weight.

The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power, a fifth lens having a refractive power, of which an image-side surface is a concave surface; a sixth lens having a refractive power; and a seventh lens having a negative refractive power. An effective focal length f of the optical imaging lens assembly and half of a maximal field-of-view angle HFOV of the optical imaging lens assembly satisfy: 5.5 mm<tan(HFOV)*f<6.5 mm. The optical imaging lens assembly of the present disclosure has at least one of the advantages of a large imaging plane, a large wide angle, a large aperture and ultra-thinness.

The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power, a fifth lens having a refractive power, of which an image-side surface is a concave surface; a sixth lens having a refractive power; and a seventh lens having a negative refractive power. An effective focal length f of the optical imaging lens assembly and half of a maximal field-of-view angle HFOV of the optical imaging lens assembly satisfy: 5.5 mm<tan(HFOV)*f<6.5 mm. The optical imaging lens assembly of the present disclosure has at least one of the advantages of a large imaging plane, a large wide angle, a large aperture and ultra-thinness.

A reality capture device configured to perform a measuring process for generating a digital representation of an environment comprising a body defining a first axis, and an imaging unit with one or more 2D cameras configured to provide 2D image data of the environment. The device comprises a ToF camera arrangement configured for capturing 3D point-cloud data of the environment and comprising at least two time-of-flight cameras, wherein each time-of-flight camera comprises a sensor array and one or more laser emitters, the sensor array of each of the time-of-flight cameras having an optical axis and being configured to receive reflections of light pulses emitted by the one or more laser emitters of the respective time-of-flight camera, the time-of-flight cameras being arranged around the first axis so that each sensor array has one or two other sensor arrays as a neighbouring sensor array.

A reality capture device configured to perform a measuring process for generating a digital representation of an environment comprising a body defining a first axis, and an imaging unit with one or more 2D cameras configured to provide 2D image data of the environment. The device comprises a ToF camera arrangement configured for capturing 3D point-cloud data of the environment and comprising at least two time-of-flight cameras, wherein each time-of-flight camera comprises a sensor array and one or more laser emitters, the sensor array of each of the time-of-flight cameras having an optical axis and being configured to receive reflections of light pulses emitted by the one or more laser emitters of the respective time-of-flight camera, the time-of-flight cameras being arranged around the first axis so that each sensor array has one or two other sensor arrays as a neighbouring sensor array.