In one embodiment, a LIDAR device of an autonomous driving vehicle (ADV) includes an array of light emitters to emit a number of light beams to sense a physical range associated with a target. The LIDAR device further includes a prism-shaped mirror assembly having a plurality of joining faces acting as reflective surfaces and a bottom base face. The rotatable platform is configured to rotate with respect to a vertical axis perpendicular to the bottom base face. The light emitters are configured to project the light beams onto the reflective surfaces of the mirror assembly, which are deflected towards the target. The mirror assembly rotates along with the rotatable platform while the array of light emitters remains steady. The LIDAR device further includes one or more light detectors to receive at least a portion of the light beams reflected from the target.

An apparatus include a motor, a first scanner, and a second scanner. The first scanner is coupled to the motor, and the motor is configured to rotate the first scanner at a first angular velocity about a rotation axis to deflect a first beam incident in a third plane on the first scanner into a first plane different from the third plane. The second scanner is coupled to the motor, and the motor is configured to rotate the second scanner at a second angular velocity different from the first angular velocity about the rotation axis to deflect a second beam incident in the third plane on the second scanner into a second plane different from the third plane.

An apparatus include a motor, a first scanner, and a second scanner. The first scanner is coupled to the motor, and the motor is configured to rotate the first scanner at a first angular velocity about a rotation axis to deflect a first beam incident in a third plane on the first scanner into a first plane different from the third plane. The second scanner is coupled to the motor, and the motor is configured to rotate the second scanner at a second angular velocity different from the first angular velocity about the rotation axis to deflect a second beam incident in the third plane on the second scanner into a second plane different from the third plane.

An apparatus include a motor, a first scanner, and a second scanner. The first scanner is coupled to the motor, and the motor is configured to rotate the first scanner at a first angular velocity about a rotation axis to deflect a first beam incident in a third plane on the first scanner into a first plane different from the third plane. The second scanner is coupled to the motor, and the motor is configured to rotate the second scanner at a second angular velocity different from the first angular velocity about the rotation axis to deflect a second beam incident in the third plane on the second scanner into a second plane different from the third plane.

A light scanning type object detecting device includes a mirror unit in which first and second mirror surfaces are formed so as to incline in respective directions intersecting with a rotation axis and to face each other with a predetermined angle, a light source; and a light receiving element. On the assumption that H represents a distance between an intersection point of extension lines of lateral sides and a bottom side in the first mirror surface, r represents a radius of a received light flux, h represents a distance between the center of the received light flux and the bottom side, and H represents a distance between a top side and the bottom side, formulas (1) and (2) are satisfied.
when r<0.4H, 0.1<h/H(Hr)/H(1)
when r0.4H, 0.2<h/H(Hr)/H(2)

An optical unit contains an optical element made of resin obtained by integrally forming a reflector in which a reflecting surface which reflects a light flux is formed on an outer peripheral side surface, and a flange extending in a direction orthogonal to the reflector to support the reflector; a rotary driving body which rotates the optical element; and a connecting device which connects the flange of the optical element to the rotary driving body, the optical element being capable of rotating around a rotational axis of the rotary driving body.

A pixel clock generating device includes a high-frequency clock generator, a comparer, a pixel clock generator, and a value switcher. The high-frequency clock generator is configured to generate a high-frequency clock. The comparer is configured to measure a time interval between a leading-end synchronizing signal and a trailing-end synchronizing signal in a main scanning and calculate an error between the time interval and a target value. The pixel clock generator is configured to generate a pixel clock based on the high-frequency clock and a pixel clock frequency and correct the pixel clock based on the error. The value switcher, including a plurality of groups of values with which the pixel clock is generated, is configured to switch between the plurality of groups of values according to a switching signal after the trailing-end synchronizing signal is inputted, the comparer calculates the error, and the pixel clock generator corrects the pixel clock.

A measurement device 100 is provided with a MEMS mirror 4 which radiates projection light L1 while changing the radiating direction of the projection light L1, a convex mirror 6A which reflects the projection light L1 radiated during a first time period in a cycle, and a concave mirror 6B which reflects the projection light L1 radiated during a second time period in the cycle. At this time, the projection light L1 reflected by the convex mirror 6A and the return light L2 reflected by the concave mirror 6B are radiated towards different heights that are different in a predetermined direction (Z axis direction).

In one embodiment, a LIDAR device of an autonomous driving vehicle (ADV) includes an array of light emitters to emit a number of light beams to sense a physical range associated with a target. The LIDAR device further includes a prism-shaped mirror assembly having a plurality of joining faces acting as reflective surfaces and a bottom base face. The rotatable platform is configured to rotate with respect to a vertical axis perpendicular to the bottom base face. The light emitters are configured to project the light beams onto the reflective surfaces of the mirror assembly, which are deflected towards the target. The mirror assembly rotates along with the rotatable platform while the array of light emitters remains steady. The LIDAR device further includes one or more light detectors to receive at least a portion of the light beams reflected from the target.

An optical apparatus is provided. The apparatus comprises a rotatable reflecting member including a first reflecting surface and a second reflecting surface, an optical system configured to sequentially reflect, by a plurality of reflecting surfaces included therein, light reflected by the first reflecting surface and cause the light to be incident on the second reflecting surface, and an adjusting device configured to change a rotation angle of the reflecting member to adjust an optical path of light that is reflected by the second reflecting surface and exits the second reflecting surface.