An optical scanning device and an imaging apparatus are provided. The optical scanning device includes a light source for emitting a light beam, a first optical unit for collimating the light beam emitted by the light source in a main scanning direction and focus the light beam in an auxiliary scanning direction, an optical deflector for deflecting the light beam, and an imaging optical system for guiding the light beam to a scanned surface for imaging. When the optical deflector deflects the light beam at a maximum deflection angle, the light beam in the main scanning direction forms a maximum incident angle Φ.sub.max with a normal line of the scanned surface. A spot tilt rate e/a of a light spot on the scanned surface satisfies $\frac{e}{a}\le 10\%,$
where a is a size of the light spot in the main scanning direction and e is a spot tilt.

An optical scanning device and an imaging apparatus are provided. The optical scanning device includes a light source for emitting a light beam, a first optical unit for collimating the light beam emitted by the light source in a main scanning direction and focus the light beam in an auxiliary scanning direction, an optical deflector for deflecting the light beam, and an imaging optical system for guiding the light beam to a scanned surface for imaging. When the optical deflector deflects the light beam at a maximum deflection angle, the light beam in the main scanning direction forms a maximum incident angle Φ.sub.max with a normal line of the scanned surface. A spot tilt rate e/a of a light spot on the scanned surface satisfies $\frac{e}{a}\le 10\%,$
where a is a size of the light spot in the main scanning direction and e is a spot tilt.

Disclosed herein is an apparatus suitable for light scanning. The apparatus may comprise a light source, an optical device and a detector. The light source may be configured to generate a scanning light beam that diverges along a first dimension to illuminate a line along the first dimension in a target scene, and may be configured to scan the scanning light beam in a second dimension perpendicular to the first dimension. The optical device may be configured to converge return light waves reflected off of the target scene to generate converged return light waves. The detector may comprise a light receiving component. The light receiving component may be configured to receive the converged return light waves. The detector may be configure to detect the converged return light waves incident on the light receiving component.

Disclosed herein is an apparatus suitable for light scanning. The apparatus may comprise a light source, an optical device and a detector. The light source may be configured to generate a scanning light beam that diverges along a first dimension to illuminate a line along the first dimension in a target scene, and may be configured to scan the scanning light beam in a second dimension perpendicular to the first dimension. The optical device may be configured to converge return light waves reflected off of the target scene to generate converged return light waves. The detector may comprise a light receiving component. The light receiving component may be configured to receive the converged return light waves. The detector may be configure to detect the converged return light waves incident on the light receiving component.

A light detection and ranging (lidar) device includes: a lower base; an upper base; a laser emitting unit for emitting a laser in a form of a point light source; a nodding mirror for transforming the laser in the form of the point light source to a line beam pattern which is perpendicular to the lower base, wherein the nodding mirror reflects the laser emitted from the laser emitting unit; a polygonal mirror for transforming the line beam pattern to a plane beam pattern and receiving a laser reflected from an object; and a sensor unit for receiving the laser reflected from the object via the polygonal mirror.

A light detection and ranging (lidar) device includes: a lower base; an upper base; a laser emitting unit for emitting a laser in a form of a point light source; a nodding mirror for transforming the laser in the form of the point light source to a line beam pattern which is perpendicular to the lower base, wherein the nodding mirror reflects the laser emitted from the laser emitting unit; a polygonal mirror for transforming the line beam pattern to a plane beam pattern and receiving a laser reflected from an object; and a sensor unit for receiving the laser reflected from the object via the polygonal mirror.

An optical scanning device includes a control unit, a light deflector, light detection units, and a light source. A mirror unit of the light deflector has a flat reflection part for generating scanning light and a groove-shaped reflection part for generating twice reflected light, and performs reciprocating rotation about a rotation axis. The light detection units are disposed at positions on the scanning trajectory of the scanning light where the twice reflected light is received, and are each divided into light detectors in the scanning direction of the scanning light by a division line. The control unit detects the deflection angle θ of the mirror unit based on both the output of the light detector and the output of the light detector.

An optical scanning device includes a control unit, a light deflector, light detection units, and a light source. A mirror unit of the light deflector has a flat reflection part for generating scanning light and a groove-shaped reflection part for generating twice reflected light, and performs reciprocating rotation about a rotation axis. The light detection units are disposed at positions on the scanning trajectory of the scanning light where the twice reflected light is received, and are each divided into light detectors in the scanning direction of the scanning light by a division line. The control unit detects the deflection angle θ of the mirror unit based on both the output of the light detector and the output of the light detector.

An optical scanning device includes a light source, a beam detector that takes a main scanning start time of a light beam emitted from the light source and deflection-scanned in a predetermined main scanning direction by a deflection-scanning component, and a housing with a support portion that supports reflecting mirrors in different arrangement positions so arrangement angles are different from each other. The support portion includes a first support portion that supports a first side surface of the reflecting mirror in a plurality of arrangement positions. A second support portion supports the first side surface of the mirror with the first support portion, causing a first arrangement angle in the first arrangement position of the reflecting mirror. A third support portion supports the first side surface of the reflecting mirror with the first support portion, causing a second arrangement angle in a second arrangement position of the reflecting mirror.

A projection device according to the present disclosure includes a light emission display panel in which a plurality of pixels including a light emission element are arranged in a matrix shape, a scanning mirror configured to reflect, toward a scanned surface, imaging light emitted from the light emission display panel and performs two-dimensional scanning of the reflected imaging light on the scanned surface, and a projection optical system configured to guide the imaging light from the light emission display panel to the scanning mirror.