An optical unit includes a projection lens, a prism configured to guide the image light from the projection lens, and a mirror member configured to reflect, toward a pupil position, the image light from the prism, wherein the prism includes a first surface where the image light from the projection lens is incident while being transmitted, a second surface at which the image light that passed through the first surface is reflected, and a third surface at which the image light that passed through the second surface is reflected toward the second surface, and the image light reflected at the third surface is emitted while being transmitted through the second surface.

A laser projection system utilizes a waveguide having a narrow incoupler for double-bounce mitigation and form factor reduction. An optical scanner includes an optical relay positioned in between two scan mirrors. The first scan mirror scans laser light into the optical relay in a first dimension, and the optical relay and converges the scanned laser light towards a second scan mirror. The second scan mirror scans laser light along a second dimension substantially perpendicular to a path over which the laser light is scanned across the second scan mirror, and the convergence introduced by the optical relay causes the laser light to be scanned as a line or arc path of an exit pupil plane that is coincident with the incoupler. The optical relay may include one or more lenses or may be a monolithic molded structure, which may be an Offner-style relay or a molded reflective relay.

A head-up display is configured to project an image on a transparent reflection member to cause an observer to visually recognize a virtual image, and includes a display device configured to display the image, and a projection optical system configured to project the image displayed by the display device as the virtual image for the observer. The projection optical system is configured to form the image as an intermediate image, and includes a first optical element configured to condense light, a first lens configured to condense light, and a second optical element configured to diffuse light. The first optical element, the first lens, and the second optical element are disposed in this order along an optical path from the display device.

Projection optical system for forming an image on a substrate and including an illumination relay lens and a projection lens each of which is a catadioptric system. The projection lens may include two portions in optical communication with one another, the first of which is dioptric and the second of which is catadioptric. In a specific case, the projection optical system satisfies

[00001]$4<\frac{.Math.{}_I.Math.}{.Math.{}_T.Math.}<30,$

where .sub.I and .sub.T are magnifications of the first portion and the overall projection lens. Optionally, the projection lens may be structured to additionally satisfy

[00002]$6<\frac{.Math.{}_{\mathrm{II}}.Math.}{.Math.{}_T.Math.}<20,$

where .sub.II is a magnification of the second portion. A digital scanner including such projection optical system and operating with UV light having a spectral bandwidth on the order of 1 picometer. Method for forming an image with such projection optical system.

Projection optical system for forming an image on a substrate and including an illumination relay lens and a projection lens each of which is a catadioptric system. The projection lens may include two portions in optical communication with one another, the first of which is dioptric and the second of which is catadioptric. In a specific case, the projection optical system satisfies $4<\frac{.Math.{}_I.Math.}{.Math.{}_T.Math.}<30,$
where .sub.I and .sub.T are magnifications of the first portion and the overall projection lens. Optionally, the projection lens may be structured to additionally satisfy $6<\frac{.Math.{}_{\mathrm{II}}.Math.}{.Math.{}_T.Math.}<20,$
where .sub.II is a magnification of the second portion. A digital scanner including such projection optical system and operating with UV light having a spectral bandwidth on the order of 1 picometer. Method for forming an image with such projection optical system.

A 3D imaging apparatus with enhanced depth of field to obtain electronic images of an object for use in generating a 3D digital model of the object. The apparatus includes a housing having mirrors positioned to receive an image from an object external to the housing and provide the image to an image sensor. The optical path between the object and the image sensor includes an aperture element having apertures for providing the image along multiple optical channels with a lens positioned within each of the optical channels. The depth of field of the apparatus includes the housing, allowing placement of the housing directly on the object when obtaining images of it.

The present invention relates to a mobile terminal, which includes a terminal body, an optical system located in the terminal body and being configured to receive light; a rod located at a side of the optical system; and a curved mirror located at an end portion of the rod, wherein the rod and the curved mirror are positionable between a first state and a second state, wherein in the first state the rod and the curved mirror are relatively closer to the optical system, and in the second state the rod and the curved mirror have been extended outward from the optical system, and wherein the curved mirror reflects omnidirectional light incident on the curved mirror toward the optical system when in the second state.

A 3D imaging apparatus with enhanced depth of field to obtain electronic images of an object for use in generating a 3D digital model of the object. The apparatus includes a housing having mirrors positioned to receive an image from an object external to the housing and provide the image to an image sensor. The optical path between the object and the image sensor includes an aperture element having apertures for providing the image along multiple optical channels with a lens positioned within each of the optical channels. The depth of field of the apparatus includes the housing, allowing placement of the housing directly on the object when obtaining images of it.

A projection apparatus includes an image-producing element and projection optics. The image-producing element produces at least one image, and the projection optics has free-form areas for magnifying and reflecting the image toward an viewer for observation. The projection optics includes at least a first mirror and a second mirror, the image is reflected by the first mirror and the second mirror in succession, no deflection mirror is disposed between the viewer and the second mirror, and the first mirror and the second mirror are in the form of a non-rotationally symmetrical system.

The present disclosure relates to optical system and display apparatus. An optical system guides a light beam from a display element to an exit pupil. The optical system includes a first optical element including a transmission surface, a reflection-transmission surface, and a reflection surface, and a negative lens including a concave surface on an exit pupil side. The light beam from the display element heads toward the exit pupil via the transmission surface, the reflection-transmission surface, the reflection surface, the reflection-transmission surface, and the negative lens in this order. A predetermined condition is satisfied.