An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.

An additive manufacturing apparatus includes a platform, a dispenser configured to deliver a plurality of successive layers of feed material on a platform, a light source configured to generate a light beam, an auxiliary polygon mirror scanner configured to receive the light beam from the light source and reflect the light beam, and a primary mirror scanner to receive the light beam reflected by the auxiliary polygon mirror scanner and direct the light beam to impinge on an exposed layer of feed material.

An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.

Systems and methods for convergent 3D displays. In one embodiment, the 3D display has a display screen that includes a convergent reflector and a horizontally narrow angle diffuser. The convergent reflector focuses 2D images projected on the diffuser from an array of 2D image projectors to form viewpoints in an eyebox where one viewpoint corresponds to one projector. At a particular viewpoint, the viewer's eye sees a full-screen field of view from a corresponding projector in the array. The narrow angle diffuser diffuses incident rays projected from the 2D image projectors into narrow angular slices so that the views in the eyebox are continuously blended together. The system and methods provide advantages in that only a few projectors are required in the array to provide the viewer with a full-screen field of view and a sufficiently large eyebox for comfortable viewing.

A scanning optical system, includes a mirror unit having a first mirror surface and a second mirror surface which incline to a rotation axis; and a light projecting system having a light source. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit. In the case where a virtual plane is set in a range including the object, a light flux reflected on the second mirror surface has, upon entering the virtual plane, a cross sectional shape in which a length in a direction orthogonal to the main scanning direction is longer than a length in the main scanning direction.

A scanner having: a first mirror having multiple concavities configured to reflect light from a document; a sensor configured to sense light reflected by a concavity of the first mirror; and a wall disposed to the first mirror and protruding from between the multiple concavities.

The embodiments described herein provide scanning laser devices that include an output optic configured to reduce image distortion. Specifically, the output optic is configured to reduce the distortions that could otherwise occur at relatively short projection distances, while also providing good image quality at relatively long projection distances. In general, the output optic includes a prism having a first surface, a second surface, and a third surface. The prism is configured such that the laser light interacts with each of these three surfaces while being transmitted through the prism and outputted to the display surface. The first, second, and third surfaces are each formed to have a freeform rotationally asymmetric shape, and these freeform rotationally asymmetric shapes are configured to work together to correct distortion in projected images.

The present disclosure describes a system and method for coaxial LiDAR scanning. The system includes a first light source configured to provide first light pulses. The system also includes one or more beam steering apparatuses optically coupled to the first light source. Each beam steering apparatus comprises a rotatable concave reflector and a light beam steering device disposed at least partially within the rotatable concave reflector. The combination of the light beam steering device and the rotatable concave reflector, when moving with respect to each other, steers the one or more first light pulses both vertically and horizontally to illuminate an object within a field-of-view; obtain one or more first returning light pulses, the one or more first returning light pulses being generated based on the steered first light pulses illuminating an object within the field-of-view, and redirects the one or more first returning light pulses.

The present invention provides a scanning system (100) comprising a first port for receiving or emitting a stationary beam (60) of electromagnetic radiation, a second port for emitting or receiving a scanning beam of electromagnetic radiation, the scanning beam scanning in a main scanning direction, a scanning element (61) for relaying the stationary beam (60) into the scanning beam or vice versa, an optical system between the scanning element (61) and the second port, wherein the optical system comprises at least a first mirror (63) and a second mirror (64) having a rotationally symmetric curved mirror surface around their optical axis, at least one of the first and the second curved mirror surface having an aspheric shape, and wherein the first and the second mirror (63, 64) have an off-axis decentered aperture and are offset in position in a direction perpendicular to the main scanning direction.

A beam director, typically comprises a first mirror rotating about a longitudinal axis, with a reflective surface at an acute angle to the longitudinal axis, which enables a laser beam to be transmitted along the longitudinal axis and redirected onto a work surface, which is typically perpendicular to the longitudinal axis. A second stationary arcuate mirror segment may be used to reflect the beam along an arcuate path on the work surface. Previous beam director systems can be improved or simplified by: 1) elimination of the second mirror with a 90 reflection to the work surface; 2) fixing the Tangent factor when drawing/rendering/sintering/cutting using f-theta like lens; and 3) fixing the Tangent factor by controlling the amount and/or the duration of energy.