Largan Precision Co., Ltd.

Fuh-Shyang Yang

Chun-Che Hsueh

Tsung-Han Tsai

Hsiang-Chi Tang

Yu Jie Hong

Hsin-Hsuan Huang

Kuan-Ming Chen

Jin Sen Wang

An optical system includes an aperture stop, an image surface, a reflective polarizer, a partial reflector, first and second quarter-wave plates and first, second and third lens elements. The aperture stop and the image surface are respectively at a front side and a rear side of the optical system. The reflective polarizer is between the aperture stop and the image surface. The partial reflector is between the reflective polarizer and the image surface. The first quarter-wave plate is between the reflective polarizer and the partial reflector. The second quarter-wave plate is between the partial reflector and the image surface. The first lens element is between the aperture stop and the image surface. The second lens element is between the first lens element and the image surface. The third lens element has negative refractive power and is between the second lens element and the image surface.

Optical system and head-mounted device

An optical lens system includes two lens elements which are, in order from an object side to an image side along an optical path: a first lens element and a second lens element. Each of the two lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of the object-side surface and the image-side surface of at least one lens element of the optical lens system is aspheric. A total number of the lens elements in the optical lens system is two.

Optical lens system and time of flight sensing module

An optical system includes an image surface, an aperture stop, a first and a second quarter-wave plate, a partial reflector, a reflective polarizer, a first and a second optical lens element. The image surface and the aperture stop are respectively at a front side and a rear side of the optical system. The first quarter-wave plate is between the image surface and the aperture stop. The partial reflector between the first quarter-wave plate and the aperture stop has an average light reflectivity of 35%. The second quarter-wave plate is between the partial reflector and the aperture stop. The reflective polarizer is between the second quarter-wave plate and the aperture stop. The first optical lens element between the image surface and the aperture stop has a convex front-side surface. The second optical lens element between the first optical lens element and the aperture stop has a concave rear-side surface.

A light engine includes an image surface, a projected light surface, a projection lens assembly, and a plurality of folding elements. The image surface has three image areas. The projected light surface has three light sources that provide light with different wavelengths. The plurality of folding elements are arranged along a light emitting axis. The image surface and the projected light surface are substantially in parallel with the light emitting axis, and there is an air gap located between the image surface and the projected light surface. The three light sources respectively correspond to the plurality of folding elements and respectively correspond to the three image areas, and the light emitting axis and the projection lens assembly are disposed on the same optical path.

Light engine and projection device

A head-mounted device includes a first light field camera, a second light field camera, a first light field display, a second light field display and a supporting structure. Each of the first light field camera and the second light field camera includes, in order from an object side to an image side, a lens group, a collimator and an image sensor. Each of the lens groups includes a plurality of lens units. The lens units are arranged in a two-dimensional lens array, and each of the lens units includes a lens container and a plurality of lens elements. A first engaging structure is disposed between at least two adjacent lens elements of the lens elements.

Head-mounted device

A head-mounted device includes a plurality of front camera modules, a display device, an in-display camera module and an image-processing unit. The front camera modules include a first camera module and a second camera module that are respectively disposed at the left and right sides of the head-mounted device. The in-display camera module is disposed within the boundary of the display device. The image-processing unit is in communication connection with the front camera modules and the display device. The display device and the in-display camera module face a user side of the head-mounted device.

An optical fingerprint identification system includes a base, a photo sensor, a light emitting layer and a cover. The photo sensor is disposed on the base. The light emitting layer is disposed above the photo sensor, and the light emitting layer includes a light emitting element. The cover is disposed above the light emitting layer. The optical fingerprint identification system further includes a light path adjusting element between the photo sensor and the cover. The light emitting element is disposed away from the light path adjusting element and the photo sensor in a sideway direction that is different from a stack direction of the optical fingerprint identification system.

Optical fingerprint identification system and optical fingerprint identification device

An optical fingerprint identification system includes a cover, a light emitting layer, an optical layer, an image sensor and a base that are sequentially disposed from top to bottom. The cover has a fingerprint contact surface on top. The image sensor has an image surface. The optical layer includes a first array layer and a second array layer, and the first array layer is stacked on top of the second array layer. The first array layer and the second array layer respectively include a plurality of first array lens elements and a plurality of second array lens elements respectively arranged at equal intervals in a first direction. Each of the first array lens elements and a corresponding second array lens element of the second array layer are coaxial along an optical axis and form an imaging unit.

Optical fingerprint identification system

An optical fingerprint identification system includes a base, a photo sensor, a light emitting layer and a cover. The photo sensor is disposed on the base. The light emitting layer is disposed above the photo sensor, and the light emitting layer includes a light emitting element. The cover is disposed above the light emitting layer. The optical fingerprint identification system further includes a condenser unit and a light receiving element between the photo sensor and the cover. The condenser unit is disposed above the photo sensor. The light receiving element is disposed above the condenser unit. The light emitting element is disposed away from the photo sensor, the condenser unit and the light receiving element in a sideway direction that is different from a stack direction of the optical fingerprint identification system.

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Taichung, Taiwan

Fuh-Shyang Yang