An image forming apparatus includes plural photosensitive members, a scanner unit for scanning the photosensitive members, and a fixing unit for fixing toner images. The scanner unit includes a rotatable polygonal mirror for reflecting laser beams emitted in correspondence to respective photosensitive members, reflecting members for reflecting the laser beams, and a box for accommodating the polygonal mirror and the reflecting members. The box includes plural outlets for the laser beams. Of the reflecting members, first and second reflecting members reflect laser beams toward corresponding first and second outlets respectively positioned farthest from and closest to the fixing unit. A distance between the first outlet and its corresponding photosensitive member is longer than a distance between the second outlet and its corresponding photosensitive member, whereas a distance between the first reflecting member and the polygonal mirror is shorter than a distance between the second reflecting member and the polygonal mirror.

Implementations described herein generally relate to scanning beam display systems and more specifically, to systems and methods for improved image alignment of such scanning beam display systems. The method comprises providing a display system comprising a display screen having a plurality of display screen region each with a corresponding light engine module having a servo laser beam and an excitation laser beam, scanning the servo laser beam of a light engine module in an outer scanning region outside of the light engine module's corresponding display screen region, detecting servo laser beam feedback light to measure an alignment error of the light engine module relative to the light engine module's corresponding display screen region, and adjusting alignment of the excitation laser beam based on the measured alignment error.

The present invention relates to a head device of a three-dimensional modelling equipment, and a modelling plane scanning method using the same, the head device of a three-dimensional modelling equipment comprising: a modelling light source array having a plurality of modelling light sources; a light guide part, installed at a given position above a modelling plane, having a function of reflecting modelling rays from the modelling light source array so as to be incident on the modelling plane; and a controller for controlling the operations of the modelling light source array and the light guide part in a conjoined manner, wherein a plurality of modelling rays generated from the plurality of modelling light sources are irradiated while forming one line scan having a first axial direction on the modelling plane, and the light guide part continuously or intermittently moves the one line scan on the modelling plane to irradiate the modelling light rays across the modelling plane. The present invention has the effects of enabling high-speed scanning to be performed, and modelling precision to be enhanced through precise scanning control.

A first supporting unit configured to movably support, in a direction intersecting with A length direction of A first reflecting mirror, an end of the first reflecting mirror in the length direction of the first reflecting mirror; a second supporting unit configured to movably support, in a direction intersecting with the length direction of a second reflecting mirror, an end of the second reflecting mirror in the length direction of the second reflecting mirror; a first drive source; a first transmission unit configured to transmit, when the first drive source provides a drive source in a first direction, the movement of the first drive source to a first supporting unit; and a second transmission unit configured to transmit, when the first drive source provides a drive source in a second direction, a movement of a second drive source to the second supporting unit.

The present disclosure provides an optical scanning apparatus and an electronic image-forming apparatus. The optical scanning apparatus includes a light source; a first optical unit; an optical deflector, configured to deflect the light beam emitted from the first optical unit; and a second optical unit, configured to guide the light beam deflected by the optical deflector on a scanned target surface for forming an image. An image height on the scanned target surface satisfies an expression: Y=fc×tan(B×θ), where Y denotes the image height on the scanned target surface, fc denotes an image-forming characteristic coefficient of the second optical unit, B denotes a scanning coefficient of the second optical unit, θ denotes an effective scanning angle of the optical scanning apparatus, and all region or a partial region in effective scanning range of the second optical unit satisfies a condition: 0.7≤B≤0.9.

Aspects of the technology employ sensors having high speed rotating mirror assemblies. For instance, the sensors may be Lidar sensors configured to detect people and other objects in an area of interest. A given mirror assembly may have a triangular or other geometric cross-sectional shape. The reflective faces of the mirror assembly may connect along edges or corners. In order to minimize wind drag and torque issues, the corners are rounded, filleted, beveled, chamfered or otherwise truncated. Such truncation may extend the length of the mirror side. The mirror assembly may employ one or more beam stops, light baffles and/or acoustic/aerodynamic baffles. These sensors may be employed with self-driving or manual driven vehicles or other equipment. The sensors may also be used in and around buildings.

Aspects of the technology employ sensors having high speed rotating mirror assemblies. For instance, the sensors may be Lidar sensors configured to detect people and other objects in an area of interest. A given mirror assembly may have a triangular or other geometric cross-sectional shape. The reflective faces of the mirror assembly may connect along edges or corners. In order to minimize wind drag and torque issues, the corners are rounded, filleted, beveled, chamfered or otherwise truncated. Such truncation may extend the length of the mirror side. The mirror assembly may employ one or more beam stops, light baffles and/or acoustic/aerodynamic baffles. These sensors may be employed with self-driving or manual driven vehicles or other equipment. The sensors may also be used in and around buildings.

A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.

An optical scanner is provided with a light source, a deflector, an optical element, an imaging lens, a fixing structure, and a housing. The optical element has a reflecting surface. The fixing structure has a first support wall, a second support wall and a biasing member. The first support wall has a support projection with a tip part protruding along a thickness direction toward a rear surface and abutting on the rear surface, and an inclined surface extending from a tip part to a side opposite to the second support wall. A first angle between a first straight line extending in the perpendicular direction orthogonal to a bottom surface of the housing and a surface of the optical element is smaller than a second angle between the first straight line and the inclined surface. The second angle is less than 90 degrees.

Implementations described and claimed herein provide a mechanically-scanning 3-dimensional light detection and ranging (3D LiDAR) system including a galvo mirror assembly, wherein the galvo mirror assembly includes a mirror attached to an armature of a galvanometer to reflect a light signal generated by a light generator and received from a target, at least one permanent magnet, and at least one coil configured to carry a current to move the armature.