A lens device for inspecting an object having at least one end surface and at least one lateral surface, substantially orthogonal to the end surface, is provided.

A lens device for inspecting an object having at least one end surface and at least one lateral surface, substantially orthogonal to the end surface, is provided.

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.

The present invention provides a lens module and an electronic device. The lens module includes a lens barrel, a lens group and a supporting portion. The lens barrel is provided with a cavity inside. The lens group includes a first lens and a second lens arranged along an extension direction of an optical axis, one side of the first lens adjacent to the second lens is provided with a first clamping portion, one side of the second lens adjacent to the first lens is provided with a second clamping portion, the first clamping portion is clamped with the second clamping portion.

The present disclosure discloses a projection lens assembly. The projection lens assembly includes, sequentially from an image-source side to an image side along an optical axis, a first lens having a positive refractive power; and a second lens having a positive refractive power. At least one of the first lens or the second lens is a glass lens. A total effective focal length f of the projection lens assembly and an effective focal length f2 of the second lens satisfy: 1<f/f2<1.5.

The present disclosure discloses a projection lens assembly. The projection lens assembly includes, sequentially from an image-source side to an image side along an optical axis, a first lens having a positive refractive power; and a second lens having a positive refractive power. At least one of the first lens or the second lens is a glass lens. A total effective focal length f of the projection lens assembly and an effective focal length f2 of the second lens satisfy: 1<f/f2<1.5.

An ophthalmic imaging system comprises a photographing optical system including an ophthalmic lens module including a first positive lens and a first converging lens sequentially arranged from the examinee's fundus and a projection lens module including a negative meniscus with a convex surface facing in an opposite direction of the examinee's fundus, a second positive lens, a diverging lens, and a second converging lens sequentially arranged from the examinee's fundus wherein the following conditional expression is satisfied, S′p/Sp≥2.8, Sp≥30 mm, wherein Sp, Sp′ is a first distance from a paraxial plane of the ophthalmic lens module to an entrance pupil plane and a second distance from a paraxial plane of the ophthalmic lens module to an exit pupil plane.

An ophthalmic imaging system comprises a photographing optical system including an ophthalmic lens module including a first positive lens and a first converging lens sequentially arranged from the examinee's fundus and a projection lens module including a negative meniscus with a convex surface facing in an opposite direction of the examinee's fundus, a second positive lens, a diverging lens, and a second converging lens sequentially arranged from the examinee's fundus wherein the following conditional expression is satisfied, S′p/Sp≥2.8, Sp≥30 mm, wherein Sp, Sp′ is a first distance from a paraxial plane of the ophthalmic lens module to an entrance pupil plane and a second distance from a paraxial plane of the ophthalmic lens module to an exit pupil plane.

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.