A polygon mirror includes a resin member, a first surface, a second surface facing the first surface, an inner surface joining the first and second surfaces to surround a through hole extending from the first to the second surface, and includes outer surfaces joining the first and second surfaces. A first segment between the first surface and the outer surfaces is defined as a first reference of a height in a direction from a second segment between the second surface and the outer surfaces to the first segment. The first surface includes a projection that forms the inner surface and projects from the first reference toward a side opposite to the second surface. The second segment is defined as a second reference of the height in the direction. The second surface includes a depressed portion distant from the outer surfaces and depressed from the second reference toward the first surface.

A detection system, and method of using the same, for a vehicle in an environment. The system includes a line detector with a plurality of optical receiver elements arranged in a line. The optical receiver elements receive light from the environment and the line detector captures an image of the environment in a series of line scans. An optical scanning element rotates around an axis to change a field of view of the line detector with respect to the environment. The optical scanning element has a glass body defined by four glass sides and a reflective member within the glass body.

A detection system, and method of using the same, for a vehicle in an environment. The system includes a line detector with a plurality of optical receiver elements arranged in a line. The optical receiver elements receive light from the environment and the line detector captures an image of the environment in a series of line scans. An optical scanning element rotates around an axis to change a field of view of the line detector with respect to the environment. The optical scanning element has a glass body defined by four glass sides and a reflective member within the glass body.

A multi-line laser radar includes a first radar component, where the first radar component includes n lasers, an optical collimating unit, a scanning rotating mirror, and a detector, where n is greater than 1. Each laser is configured to emit one laser beam to the optical collimating unit. The optical collimating unit is configured to collimate n laser beams, where the collimated n laser beams are incident on a target reflector of the scanning rotating mirror. The scanning rotating mirror includes m reflectors rotating around a rotation axis, where a rotation plane of the rotation axis is perpendicular to an arrangement direction of the collimated n laser beams, and m is greater than 1. The target reflector reflects the received collimated n laser beams to a detection area of the first radar component. The detector receives echo signals of the reflected n laser beams in the detection area.

A wavefront sensor includes a splitting element configured to split an incident light beam into a plurality of light beams, an image sensor configured to receive the plurality of light beams, and a processing unit configured to calculate a wavefront of the incident light beam based on an intensity distribution of the plurality of light beams received by the image sensor. The splitting element is either in direct contact with the image sensor or in contact with the image sensor via a plate glass. In the calculation of the wavefront, the processing unit corrects a relative positional deviation between the splitting element and the image sensor by calculating a rotation about a rotation axis.

A mirror device includes a frame body, a shaft member provided inside the frame body and connected to the frame body at both end portions, and a reflection member fixed to the shaft member and provided so as to be capable of swinging around an axis of the shaft member. The reflection member has a base portion provided along an axial direction of the shaft member and a reflection portion provided on the base portion. The base portion has a three-dimensional uneven structure including a bottom wall portion having a main surface provided along the axial direction of the shaft member and a plurality of side wall portions extending from the bottom wall portion on the side opposite to the reflection portion.

A mirror device includes a frame body, a shaft member provided inside the frame body and connected to the frame body at both end portions, and a reflection member fixed to the shaft member and provided so as to be capable of swinging around an axis of the shaft member. The reflection member has a base portion provided along an axial direction of the shaft member and a reflection portion provided on the base portion. The base portion has a three-dimensional uneven structure including a bottom wall portion having a main surface provided along the axial direction of the shaft member and a plurality of side wall portions extending from the bottom wall portion on the side opposite to the reflection portion.

Augmented reality headsets. A plurality of tilted pin-mirrors imbedded between an inner surface and an outer surface of a combiner, where the plurality of tilted pin-mirrors are configured to reflect the guided image light towards the eye box, and wherein the plurality of pin-mirrors include one or more gaps between them wherein the one or more gaps allow the passage of an ambient light through the combiner towards the eye box.

Augmented reality headsets. A plurality of tilted pin-mirrors imbedded between an inner surface and an outer surface of a combiner, where the plurality of tilted pin-mirrors are configured to reflect the guided image light towards the eye box, and wherein the plurality of pin-mirrors include one or more gaps between them wherein the one or more gaps allow the passage of an ambient light through the combiner towards the eye box.

To provide a laser irradiation apparatus which suppresses adhesion of foreign matters to an optical element, a laser irradiation device includes: emission optical systems, which form a beam in which laser light generated by a laser oscillator converges on a predetermined beam spot, and continuously change an irradiation direction or the like of the beam; and a protective member which is arranged between the emission optical system and the beam spot, and protects the emission optical system from foreign matters scattered from an irradiation object side, and the protective member has an aperture through which the beam passes and moves in connection with a change of the irradiation direction or the like of the beam so that the aperture is positioned on a path of the beam.