A beam scanner for a near-eye display includes a beam-folded pupil relay configured for receiving a light beam reflected from a tiltable reflector and relaying the light beam to an exit pupil while preserving the beam angle of the reflected beam. The beam-folding pupil relay includes a beamsplitter, e.g. a polarization beam splitter configured to redirect the beam to a curved reflector, which sends the beam towards the exit pupil. Polarization of the light beam reflected from the curved reflector may be changed to an orthogonal polarization by a waveplate disposed in an optical path of the light beam between the polarization beam splitter and the curved reflector, enabling the reflected light beam to propagate through the polarization beam splitter towards the exit pupil. A pupil-replicating waveguide may be disposed proximate the exit pupil. A 2D tiltable reflector or a pair of 1D tiltable reflectors may be used.

A reading module has a light source, an optical system having a mirror array and an aperture stop portion, a sensor in which a plurality of image regions where the image light is converted into an electrical signal are arranged; a housing; and a light-shielding wall shielding stray light striking the image regions. In the mirror array, a plurality of reflective mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction. The optical system is fixed to on the case housing at one point in the main scanning direction, and the light shielding walls are arranged at a positions displaced deviated by a predetermined amount from boundaries between the image regions in the direction opposite to the fixed side of the optical system.

An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.

A detection system for a vehicle in an environment includes a reflective member configured to rotate about a first axis, the reflective member having a plurality of reflective sides. The detection system has a LiDAR system with at least one light transmitter and at least one light receiver. A wedge mirror deflects light between the LiDAR system and the reflective member to change the field of view of the LiDAR system in an elevation direction and in an azimuth direction. The reflective member is positioned such that rotation of the reflective member changes the field of view of the LiDAR system in an azimuth direction.

A light guide device includes a first light guide part, a polygon mirror, and a second light guide part. The first part reflects and guides a laser light emitted from a laser generator. The polygon mirror rotates and includes reflective parts. The reflective parts are arranged to form a regular polygonal reflective surface when viewed in a rotation axis direction, the polygon mirror reflecting the light guided by the first part by the reflective part while rotating. The second part reflects the light reflected at the reflective part and guides the light so that the light is irradiated to the workpiece at each of the reflective parts. The reflective part reflects the incident light so that the optical axis of the incident light offset in the rotation axis direction. At least two reflective parts differ from each other in position in the rotation axis direction.

The present disclosure describes a system and method for coaxial LiDAR scanning. The system includes a first light source configured to provide first light pulses. The system also includes one or more beam steering apparatuses optically coupled to the first light source. Each beam steering apparatus comprises a rotatable concave reflector and a light beam steering device disposed at least partially within the rotatable concave reflector. The combination of the light beam steering device and the rotatable concave reflector, when moving with respect to each other, steers the one or more first light pulses both vertically and horizontally to illuminate an object within a field-of-view; obtain one or more first returning light pulses, the one or more first returning light pulses being generated based on the steered first light pulses illuminating an object within the field-of-view, and redirects the one or more first returning light pulses.

A beam director, typically comprises a first mirror rotating about a longitudinal axis, with a reflective surface at an acute angle to the longitudinal axis, which enables a laser beam to be transmitted along the longitudinal axis and redirected onto a work surface, which is typically perpendicular to the longitudinal axis. A second stationary arcuate mirror segment may be used to reflect the beam along an arcuate path on the work surface. Previous beam director systems can be improved or simplified by: 1) elimination of the second mirror with a 90 reflection to the work surface; 2) fixing the Tangent factor when drawing/rendering/sintering/cutting using f-theta like lens; and 3) fixing the Tangent factor by controlling the amount and/or the duration of energy.

A scanner having: a first mirror having multiple concavities configured to reflect light from a document; a sensor configured to sense light reflected by a concavity of the first mirror; and a wall disposed to the first mirror and protruding from between the multiple concavities.

The present disclosure describes a system and method for coaxial LiDAR scanning. The system includes a first light source configured to provide first light pulses. The system also includes one or more beam steering apparatuses optically coupled to the first light source. Each beam steering apparatus comprises a rotatable concave reflector and a light beam steering device disposed at least partially within the rotatable concave reflector. The combination of the light beam steering device and the rotatable concave reflector, when moving with respect to each other, steers the one or more first light pulses both vertically and horizontally to illuminate an object within a field-of-view; obtain one or more first returning light pulses, the one or more first returning light pulses being generated based on the steered first light pulses illuminating an object within the field-of-view, and redirects the one or more first returning light pulses.

A reading module has a light source, an optical system having a mirror array and an aperture stop portion, a sensor in which a plurality of image regions where the image light is converted into an electrical signal are arranged; a housing; and a light-shielding wall shielding stray light striking the image regions. In the mirror array, a plurality of reflective mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction. The optical system is fixed to on the case housing at one point in the main scanning direction, and the light shielding walls are arranged at a positions displaced deviated by a predetermined amount from boundaries between the image regions in the direction opposite to the fixed side of the optical system.