Disclosed are an optical path changing unit and a lens assembly comprising same. The optical path changing unit comprises: a base; a prism unit a part of which is connected to the base and the other part of which is arranged to be movable within the base; and first to third optical image stabilizing (OIS) drive units which change the prism unit into a tiltable position.

The present specification discloses a mirror assembly having an image viewing surface which resists fogging caused by condensation of water vapor on the viewing surface and a fogless mirror system comprising such a mirror assembly and an attachment system as well as methods and uses for such mirror assembly and fogless mirror system.

A camera module includes a housing having an internal space, a printed circuit board disposed in the housing, and a reflective module disposed in the internal space of the housing and comprising a reflective member configured to change a path of incident light, and a reflective holder supporting the reflective member; and a noise prevention unit disposed on either the housing or the printed circuit board and configured to prevent the reflective holder from contacting the housing.

A facet assembly is a constituent part of a facet mirror for an illumination optical unit for projection lithography. The facet assembly has a facet with a reflection surface for reflecting illumination light. A facet main body of the facet assembly has at least one hollow chamber. A reflection surface chamber wall of the hollow chamber forms at least one portion of the reflection surface. An actuator control apparatus of the facet assembly is operatively connected to the hollow chamber for the controlled deformation of the reflection surface chamber wall. The result is a facet assembly that is usable flexibly as a constituent part of a facet mirror equipped therewith within an illumination optical unit for projection lithography.

The present invention is directed to an optical device for augmented reality using total internal reflection, the optical device including: an optical means for transmitting at least part of real object image light toward the pupil of an eye of a user; wherein a total internal reflection space configured to transfer augmented reality image light, output from an image output unit, toward the pupil of the eye of the user is formed inside the optical means; and wherein the total internal reflection space is filled with a medium having an index of refraction lower than the index of refraction of the optical means, and the augmented reality image light transferred to the total internal reflection space through the inside of the optical means is reflected by total internal reflection on the total internal reflection space and then transferred toward the pupil of the eye of the user.

A method for producing a plurality of optical prisms comprises: providing at least one manufacturing intermediate; and dividing the at least one manufacturing intermediate into a plurality of individual triangular prisms. The manufacturing intermediate comprises a main body in the form of a triangular prism having three rectangular surfaces and two triangular surfaces. The main body is formed from a light-transmitting material. A layer of opaque material is provided on two of the three rectangular surfaces of the main body, the layer of opaque material having a plurality of axially spaced apertures on each of the two of the three rectangular surfaces, each one of the apertures on one of the two surfaces being disposed at substantially the same axial position as one of the apertures on the other one of the two surfaces. The at least one manufacturing intermediate is divided into a plurality of individual triangular prisms such that each individual triangular prism has one of the apertures on each of two sides thereof.

An optical assembly includes a first prism and a second prism. The first prism has a first surface. The first surface includes a first optical region. The second prism has a second surface. The first and the second surface are disposed facing each other. The second surface includes a second optical region, in which on a first reference plane, an orthographic projection of the first optical region overlaps an orthographic projection of the second optical region, and the first reference plane is substantially parallel to the first surface or the second surface. When the optical assembly is at a first temperature, at least one of the first optical region and the second optical region is concave, and a vertical distance between the first and the second optical region gradually decreases from a first center point of the first optical region to a first edge of the first optical region.

A light direction adjustment mechanism and an imaging device that enables size reduction are provided. The adjustment mechanism includes a first optical element (201), a second optical element (202) having a same optical axis as that of the first optical element (201), and a rotation mechanism (63). The rotation mechanism (63) allows the first optical element (201) to rotate while the rotation mechanism (63) changes a rotation angle of the first optical element (201) relative to the second optical element (202) when the first optical element (201) is rotated about the optical axis in a first direction. The rotation mechanism (63) allows the first optical element (201) to rotate while the rotation mechanism (63) does not change the rotation angle of the first optical element (201) relative to the second optical element (202) when the first optical element (201) is rotated about the optical axis in a second direction.

A camera module, a camera assembly, and an electronic device are disclosed, which relate to the field of smart devices. The camera module includes a fixing member, a lens assembly, an image sensor, and a focusing assembly. The image sensor is configured to receive light transmitting through the lens assembly. In the focusing assembly, a first light-redirecting member is configured to redirect the light transmitting from the lens assembly to the image sensor; a second light-redirecting member is configured to redirect the light redirected by the first light-redirecting member, and configured to be movable relative to the fixing member to change a transmission distance of the light from the lens assembly to the image sensor.

A thermally actuated adaptive optic includes a base, a reflector, and a plurality of actuators coupled therebetween. The reflector has a light-receiving front surface, and a back surface facing the base. Each actuator includes a bracket rigidly bonded to the reflector at a perimeter of the reflector, and an inner rod and an outer rod. Each rod is rigidly connected between the bracket and the base, with the inner rod being closer to a center of the reflector. The length of each rod is temperature dependent. In another adaptive optic, the rods are instead bonded directly to the reflector. This adaptive optic may be modified to implement an integrally formed, thermally actuated support. The disclosed adaptive optics are suitable for use in laser systems, allow for significant cost savings over piezoelectric devices, provide a reflective area free of surface-figure perturbations caused by the actuator-interfaces, and are relatively simple to manufacture.