A high-speed device, for inspecting a large area of an object, which includes: a terahertz wave generation portion configured to generate a terahertz wave; a ring beam forming portion configured to form a ring beam by using the terahertz wave incident from the terahertz wave generation portion; a rotary mirror configured to reflect the ring beam formed by the ring beam forming portion while rotating to allow the ring beam to be incident on an inspection target object; and a detector configured to detect a ring beam generated from the inspection target object.

An image forming apparatus includes first and second light sensors positioned in a laser scanning system of at least one color, such that scanned light is detected by the first light sensor and then by the second light sensor and light sensing surfaces of the first and second light sensors are not parallel, and a control unit connected to the first and second light sensors and configured to determine a time difference in the timing of light detection by the first and second light sensors and to execute a color position shift operation upon determining that the time difference is greater than a first threshold value.

An optical scanning unit includes a rotatable multi-faceted mirror having a plurality of faces reflecting light flux emitted from a light source to scan a scanning area in a main scanning direction. A width of the light flux striking the rotatable multi-faceted mirror is smaller than a length of a face of the rotatable multi-faceted mirror. The entire of light flux striking the rotatable multi-faceted mirror is reflected at a first face when the light flux reflected by the rotatable multi-faceted mirror is directed to the center portion of the scanning area. A part of the light flux striking the rotatable multi-faceted mirror is reflected at the first face while the remaining of the light flux is reflected at a second face when the light flux reflected by the rotatable multi-faceted mirror is directed to a least one of the two end portions of the scanning area.

In an image forming apparatus that employs a laser scanning optical system that does not use an fθ lens, in the case where magnification correction by insertion/removal of an auxiliary pixel is performed based on the premise of digital PWM, an insertion/removal position of an auxiliary pixel is controlled in accordance with a purpose of each piece of image processing.

The present invention introduces a scanning arrangement and a method suitable for coating processes applying laser ablation. The arrangement is suited to prolonged, industrial processes. The arrangement comprises a target, which has an annular form. The laser beam direction is controlled by a rotating mirror locating along the center axis of the annular target. The scanning line will rotate circularly along the inner target surface when the mirror rotates. The focal point of the laser beams may be arranged to locate on the inner target surface to ensure a constant spot size. A ring-formed, a cylinder-shaped or a cut conical-shaped target may be used. The inner surface of the target may thus be tapered in order to control the release direction of the ablated material towards a substrate to be coated.

Embodiments of the disclosure include a receiver of an optical sensing system. The receiver may include a Hadamard mask configured to resonate during a scanning procedure performed by the optical sensing system. The Hadamard mask may include a frame beginning pattern corresponding to a start of a frame captured during the scanning procedure. The Hadamard mask may also include a coded pattern configured to provide sub-pixelization of the frame. The receiver may also include a photodetector array positioned on a first side of the Hadamard mask. The photodetector array may be configured to detect light that passes through the Hadamard mask during the scanning procedure to generate the frame.

Embodiments of the disclosure include a mask apparatus used in an optical sensing system. The apparatus may include an optical encoding mask configured to facilitate a scanning procedure of the optical sensing system, wherein the scanning procedure comprises a plurality of scanning lines. The apparatus may further include an actuator coupled to the optical encoding mask and configured to generate a force to drive the optical encoding mask to resonate in a direction perpendicular to the scanning lines during the scanning procedure.

Embodiments discussed herein refer to a relatively compact and energy efficient LiDAR system that can be mounted to a windshield on the interior cabin portion of a vehicle. In order to accommodate the relatively compact size of the LiDAR system, multiple moveable components are used to ensure that a desired resolution is captured in the system's field of view.

Provided are an light scanning device capable of adjusting the position of optics and an image forming apparatus including the light scanning device. The light scanning device includes first and second light sources configured to emit first and second light beams, respectively; optics including first and second lenses for transmitting the first and second light beams therethrough and a lens holder configured to support the second lens; and a housing configured to support the first and second light sources and the optics, wherein the first and second light sources and the first lens are supported to be fixed to the housing, and the second lens is supported to be able to move with respect to the first lens.

A laser irradiation device includes: a beam generation unit generating a laser beam; a scan mirror unit adjusting a direction of the laser beam transmitted from the beam generation unit; and a rotating mirror reflecting the laser beam of which the direction is adjusted by the scan mirror unit. The rotating mirror is provided to be rotatable so that the direction-adjusted laser beam is irradiated to an object to be processed while forming a linear laser beam on the object.