A digital exposure apparatus includes a lens array, the lens array at least including a first lens unit and a second lens unit, a light transposition assembly arranged on an exit light path of the second lens unit, and the light transposition assembly being used for controlling a light exiting from the second lens unit to be transposed with respect to an exposure direction of the digital exposure apparatus. When the digital exposure apparatus is used for exposure, a light passing through the first lens unit and a light penetrating through the second lens unit are needed to expose the same position for multiple times.

An off-axis three-mirror optical system with freeform surfaces comprised an aperture, a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The aperture is located on an incident light path. The primary mirror is located on an aperture side. The secondary mirror is located on a primary mirror reflected light path.

The tertiary mirror is located on a secondary mirror reflected light path. The detector located on a tertiary mirror reflected light path. The primary mirror and the tertiary mirror have a same fifth-order polynomial freeform surface expression. The primary mirror reflected light path, the secondary mirror reflected light path and the tertiary mirror reflected light path overlap with each other.

An apparatus for measuring a fundus of a subject. The apparatus includes a focusing unit which adjusts a defocus of the apparatus. The focusing unit includes a first focusing mirror and a second focusing mirror. The first focusing mirror and second focusing mirror are arranged so that an incident beam from the light source entering the focusing unit and an emitted beam exiting the focusing unit are substantially parallel to each other. Adjustment of the defocus is accomplished by moving both first focusing mirror and second focusing mirror such that incident beam and emitted beam remain substantially parallel to each other. The apparatus includes a wavefront sensor for detecting a shape of a wavefront. The apparatus includes a wavefront correction device. The wavefront correction device adjusts a wavefront of the light from the light source based on the shape of the wavefront detected by the wavefront sensor.

An imaging device includes two imaging optical systems each of the imaging optical systems including a wide-angle lens having an angle of view wider than 180 degrees, and an imaging sensor configured to image an image by the wide-angle lens, so as to obtain an image in a solid angle of 4π radian by synthesizing the images by the respective imaging optical systems, wherein the wide-angle lens of each of the imaging optical systems includes, in order from an object side to an image side, a front group having a negative power, a reflection surface and a back group having a positive power, and is configured to bend an optical axis of the front group by the reflection surface at 90 degrees toward the back group.

A mirror structure permitting an undistorted view of the blind spots of a vehicle include a first lens module and a second lens module. The first lens module is mounted on an A-pillar of a vehicle and located outside of the vehicle; the second lens module is opposite the first lens module and mounted inside of the vehicle on the A-pillar. The first lens module focuses light beams which would otherwise be blocked by the A-pillar of the vehicle and transmits the light beams to a front windshield of the vehicle, the light beam passing through the front windshield to reach the second lens module, the second lens module diffusing the light beams into the vision of a driver.

Aspects relate to an array camera exhibiting little or no parallax artifacts in captured images. For example, the planes of the central mirror surfaces of the array camera can be located at a midpoint along, and orthogonally to, a line between the corresponding camera location and the virtual camera location. Accordingly, the cones of all of the cameras in the array appear as if coming from the virtual camera location after folding by the mirrors. Each sensor in the array “sees” a portion of the image scene using a corresponding facet of the central mirror prism, and accordingly each individual sensor/mirror pair represents only a sub-aperture of the total array camera. The complete array camera has a synthetic aperture generated based on the sum of all individual aperture rays.

Disclosed is a fingerprint input device using a portable terminal equipped with a camera, and an external optical device for inputting a fingerprint. According to the present invention, a fingerprint image may be generated by an optical fingerprint input method by using the external optical device of the present invention even when an existing portable terminal does not have a configuration for an optical fingerprint input. To this end, the external optical device is provided as an external type to be mounted in the existing portable terminal provided with a camera, and has an optical refractor and a mirror. The external optical device may generate a user's fingerprint image by an optical fingerprint input method, in accordance with circumstances, without interrupting the main use of a camera and an LED of the existing portable terminal.

The invention relates to a scan light device for a motor vehicle, comprising at least one light source capable of emitting light rays, characterized in that it comprises a wavelength conversion element arranged to receive the light rays on a zone and to re-emit a light radiation to produce a light beam, in that the device further comprises an element for folding the light rays back to the conversion element, and scan means configured to scan the folding element with the light rays in a first direction, the scan of the light rays being performed between extreme positions of these light rays in said first direction, the folding element being configured to deflect the light rays when they are at these extreme positions to a central part of the zone of the conversion element so as to form the central part of the light beam.

Disclosed is a head-up display device for a vehicle including at least one light source, a liquid crystal display, and at least one polarization converter disposed between the light source and the liquid crystal display and configured to convert unpolarized light generated by the light source into single linearly polarized light and to provide the single linearly polarized light to the liquid crystal display.

Disclosed is a head-up display device for a vehicle including at least one light source, a liquid crystal display, and at least one polarization converter disposed between the light source and the liquid crystal display and configured to convert unpolarized light generated by the light source into single linearly polarized light and to provide the single linearly polarized light to the liquid crystal display.