An imaging lens system includes sequentially from an object side, a first lens group and a second lens group. The second lens group includes a focus lens group configured to move during focusing or the first lens group and the second lens group are divided at a position of a maximum air gap. Conditional Expressions (1) and (2) are satisfied as follows:
−2.0<fL1/f<−0.95, and  (1)
1.7<NdP1Gmin_νd/L1_νd<2.5,  (2)
where fL1 is a focal length of a lens located closest to the object side of the first lens group, f is a focal length of a whole system, NdP1Gmin_νd is an Abbe number for a d-line of a positive lens having a smallest refractive index of the first lens group, and L1_νd is an Abbe number for the d-line of the lens located closest to the object side of the first lens group.

An imaging lens system includes sequentially from an object side, a first lens group and a second lens group. The second lens group includes a focus lens group configured to move during focusing or the first lens group and the second lens group are divided at a position of a maximum air gap. Conditional Expressions (1) and (2) are satisfied as follows:
−2.0<fL1/f<−0.95, and  (1)
1.7<NdP1Gmin_νd/L1_νd<2.5,  (2)
where fL1 is a focal length of a lens located closest to the object side of the first lens group, f is a focal length of a whole system, NdP1Gmin_νd is an Abbe number for a d-line of a positive lens having a smallest refractive index of the first lens group, and L1_νd is an Abbe number for the d-line of the lens located closest to the object side of the first lens group.

A micro lens assembly for short-range imaging, in order from the object side to the image side: a flat panel, a first lens group, a stop, a second lens group, and an IR cut filter. Wherein a focal length of the first lens group combined is LF, a focal length of the second lens group combined is RF, a distance from an object to be imaged to an object-side surface of a first lens element of the first lens group along an optical axis is OTL, a distance from the object to be imaged to an image plane along the optical axis is TTL, and they satisfy the relations: LF>0; RF>0; 0.65<LF/RF<1.25; OTL<2.0 mm; TTL<10 mm Such a lens assembly can obtain higher short-range imaging effect while maintaining its miniaturization and can reduce the aberration in short-range imaging.

The imaging lens consists of, in order from the object side, a front group that includes a stop and has a positive refractive power, and a rear group. During focusing, the entire front group integrally moves, and the rear group remains stationary with respect to an image plane. The rear group includes one or more air lenses formed by two concave lens surfaces facing toward each other. The imaging lens satisfies Conditional Expressions: 0.1<Bf/f<0.9 and −0.7<(Rrf+Rrr)/(Rrf-Rrr)<-0.025, where a back focal length of a whole system is Bf, a focal length of the whole system is f, and a curvature radius of an object side surface of the air lens in the rear group is Rrf and a curvature radius of an image side surface of the air lens in the rear group is Rrr.

A method and apparatus for capturing an image of at least one object appearing in a wide-angle field of view (FOV). A housing has an image sensor and a lens assembly fixedly mounted relative thereto. The lens assembly includes first and second lens groups, and a glass lens. The lens assembly and the image sensor are aligned such that light received within the FOV passes through a front aperture and the base lens assembly and impinges onto the image sensor. The light received from the FOV forms an original image prior to entering the front aperture and the lens assembly. Light from the FOV impinging onto the sensor forms an impinging image.

A method and apparatus for capturing an image of at least one object appearing in a wide-angle field of view (FOV). A housing has an image sensor and a lens assembly fixedly mounted relative thereto. The lens assembly includes first and second lens groups, and a glass lens. The lens assembly and the image sensor are aligned such that light received within the FOV passes through a front aperture and the base lens assembly and impinges onto the image sensor. The light received from the FOV forms an original image prior to entering the front aperture and the lens assembly. Light from the FOV impinging onto the sensor forms an impinging image.

A multipass scanner usable e.g. in a near-eye display is disclosed. The multipass scanner scans a light beam angularly, forming an image in angular domain. The multipass scanner includes a light source, a tiltable reflector, and a multipass coupler that couples light emitted by the light source to the tiltable reflector, receives the reflected light and couples it back to the tiltable reflector to double the scanning angle. Then, the multipass coupler couples the light reflected at least twice from the tiltable reflector to an exit pupil of the scanner. A pupil-replicating waveguide disposed at the exit pupil of the scanner extends the image in angular domain. Multiple reflections of the light beam from the tiltable reflector enable one to increase the angular scanning range and associated field of view of the display without having to increase the angular scanning range of the tiltable reflector.

A multipass scanner usable e.g. in a near-eye display is disclosed. The multipass scanner scans a light beam angularly, forming an image in angular domain. The multipass scanner includes a light source, a tiltable reflector, and a multipass coupler that couples light emitted by the light source to the tiltable reflector, receives the reflected light and couples it back to the tiltable reflector to double the scanning angle. Then, the multipass coupler couples the light reflected at least twice from the tiltable reflector to an exit pupil of the scanner. A pupil-replicating waveguide disposed at the exit pupil of the scanner extends the image in angular domain. Multiple reflections of the light beam from the tiltable reflector enable one to increase the angular scanning range and associated field of view of the display without having to increase the angular scanning range of the tiltable reflector.

An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, and a second lens unit having a positive refractive power. An interval between the first lens unit and the second lens unit changes during focusing. The second lens unit includes, in order from the object side to the image side, a first subunit having a positive refractive power, an aperture stop, and a second subunit having a positive refractive power. A predetermined condition is satisfied.

An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, and a second lens unit having a positive refractive power. An interval between the first lens unit and the second lens unit changes during focusing. The second lens unit includes, in order from the object side to the image side, a first subunit having a positive refractive power, an aperture stop, and a second subunit having a positive refractive power. A predetermined condition is satisfied.