Abstract: A projection apparatus includes: multiple scanning optical systems each including: a light source to emit a light beam; a scanner to deflect the light beam from the light source to form a scanning light beam; a magnifier including: at least one positive lens; and at least one negative lens, to magnify a scanning angle of the scanning light beam from the scanner; and a board having: a mounting surface; and a perpendicular line perpendicular to the mounting surface, the board mounting multiple scanners including the scanner of the multiple scanning optical systems on the mounting surface. Multiple scanning light beams have the scanning light beam from the scanner are arranged in rotational symmetry with respect to the perpendicular line with different angles in a plane of the mounting surface of the board, and the multiple scanning optical systems project the multiple scanning light beams to different regions from each other.

Abstract: An imaging device includes a first imager having a first imaging range; and a second imager having a second imaging range, the second imager being asymmetrical relative to the first imager with respect to a centerline of an overlapping area between the first imaging range and the second imaging range to have a first disparity. The first disparity is smaller than a second disparity of an imaging device comprising a third imager having a third imaging range and a fourth imager having a fourth imaging range. The fourth imager is symmetrical relative to the third imager with respect to the centerline of an overlapping area between the third imaging range and the fourth imaging range.

Abstract: A light projection device includes a light source to emit light, and an optical system to project pattern light to an object. The pattern light is obtained from the light emitted from the light source. The optical system includes a first lens group on which the light emitted from the light source incident, the first lens group having a positive power, an optical element to form the pattern light from the light passing through the first lens group and incident on the optical element, and a second lens group on which the pattern light emitted from the optical element incident, the second lens group having a positive power. The second lens group includes a third lens group having a positive power, and a fourth lens group having a negative power.

Abstract: An image-capturing device includes: a casing elongated in one direction; a light receiver on one end of the casing in said one direction, a support on another end of the casing in said one direction; and a light emitter between the light receiver and the support in said one direction of the casing, to emit patterned light to a target object. The light receiver receives the patterned light reflected from the target object.

Abstract: A projection apparatus includes: multiple scanning optical systems each including: a light source to emit a light beam; a scanner to deflect the light beam from the light source to form a scanning light beam; a magnifier including: at least one positive lens; and at least one negative lens, to magnify a scanning angle of the scanning light beam from the scanner; and a board having: a mounting surface; and a perpendicular line perpendicular to the mounting surface, the board mounting multiple scanners including the scanner of the multiple scanning optical systems on the mounting surface. Multiple scanning light beams have the scanning light beam from the scanner are arranged in rotational symmetry with respect to the perpendicular line with different angles in a plane of the mounting surface of the board, and the multiple scanning optical systems project the multiple scanning light beams to different regions from each other.

Abstract: An image-capturing device includes: an imager extending along a first axis, the imager configured to capture an image; and a grip coupled to the imager, extending along a second axis tilted to the first axis, and having an elongated shape to have a periphery thereof gripped with hand of an operator of the image-capturing device.