A prism includes a first intermediate imaging position at which a component in a first direction of the light flux is imaged and a second intermediate imaging position at which a component in a second direction orthogonal to the first direction of the light flux is imaged, different from the first intermediate imaging position. At least one of the first intermediate imaging position and the second intermediate imaging position lying within a first range from the second surface between the first surface and the second surface or lying within a second range from the second surface between the second surface and the third surface. The first range has a length less than one-half of an optical path length from the first surface to the second surface, and the second range has a length less than one-half of the optical path length from the second surface to the third surface.

An optical assembly includes at least one substrate that provides a first curved surface and a second surface. The optical assembly also includes a beam splitter on the first curved surface, a reflector on the second surface, and an optical retarder disposed between the beam splitter and the reflector. The optical assembly is configured to transmit the first light through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light through peripheral portions of the optical assembly at a second optical power that is less than the first optical power. The first light includes light having a first polarization and wavelengths within a predetermined wavelength range. The second light includes light having wavelengths within the predetermined wavelength range and a second polarization orthogonal to the first polarization, as well as light having wavelengths outside the predetermined wavelength range.

An optical module in the present disclosure includes a first image display panel including a first display part and a first coupling part, a second image display panel including a second display part and a second coupling part, a third image display panel including a third display part and a third coupling part, and a cross dichroic prism configured to synthesize first, second, and third image light. The cross dichroic prism has a cross axis at which a two of photosynthesis surfaces cross each other. The first, second, and third image display panel are respectively bonded to different surfaces of the cross dichroic prism in a state where a long side of each of the first, second, and third display part extends along the cross axis and where the first, second, and third coupling part are each positioned on an outer side of the cross dichroic prism.

A display device includes a light source, a spatial light modulator, and an optical assembly. The light source is configured to provide illumination light and the spatial light modulator is positioned to receive the illumination light. The optical assembly includes a first reflective surface with an aperture and a second reflective surface that is opposite to the first reflective surface. The optical assembly is positioned relative to the light source so that at least a first portion of the illumination light received by the optical assembly is reflected by the second reflective surface toward the first reflective surface, is reflected by the first reflective surface toward the second reflective surface, and is transmitted through the second reflective surface. A method performed by the display device is also disclosed.

A display device includes a light source, a spatial light modulator, and an optical element. The optical element includes a reflective surface. The optical assembly is positioned relative to the light source so that at least a portion of the illumination light received by the optical element is reflected at the reflective surface back toward the light source. The spatial light modulator is positioned to receive at least a portion of the illumination light reflected by the reflective surface. A method performed by the display device is also disclosed.

A display device has a display, operable to generate a real image, and an optical system, comprising one or more lenslets, arranged to generate a virtual sub-image from a partial real image on the display, by each lenslet projecting light from the display to an eye position. The sub-images combine to form a virtual image viewable from the eye position. At least one lenslet is symmetric with respect to a plane, and the display surface is cylindrical with its axis perpendicular to that plane.

Methods of manufacturing eyeglasses are provided. The method may include providing a blank (63) with an outcoupling element (25) and machining the blank to provide a light receiving surface based on the at least one physiological parameter. Corresponding blanks and sets of eyeglasses are also provided.

This application provides a lens module. The lens module includes a first lens module and a second lens module, and the first lens module and the second lens module are arranged along an optical axis. The first lens module is configured to implement a long focal length, and the second lens module is configured to implement focusing. During specific disposition, the first lens module includes a first lens, and a light incident side surface of the first lens includes a light transmission region and a first reflection region; a light outgoing side surface of the first lens includes a second reflection region and a light outgoing region; and the first reflection region and the second reflection region are configured to refract light incident into the first lens. The second lens module includes at least one second lens, and the at least one second lens is a focusing lens.

The present disclosure provides an optical imager and a method for imaging electromagnetic radiation. In one aspect, the optical imager includes an object array substantially located at an object plane, a first catadioptric element configured to substantially collimate, at a central plane, electromagnetic radiation emanating from the object array, a second catadioptric element configured to image the substantially collimated electromagnetic radiation from the central plane onto an image plane, and a detecting element substantially located at the image plane. The first catadioptric element includes at least one refractive surface and at least one reflective surface, and the second catadioptric element includes at least one refractive surface and at least one reflective surface.

A display device includes a light source, a spatial light modulator (SLM), and an optical assembly that includes a first reflective surface and a second reflective surface that is opposite to the first reflective surface. The light source is configured to provide illumination light. The optical assembly is configured to receive the illumination light. At least a first portion of the illumination light received by the optical assembly is transmitted through the first reflective surface toward the second reflective surface, is reflected by the second reflective surface toward the first reflective surface, is reflected by the first reflective surface toward the second reflective surface, and is transmitted through the second reflective surface. The SLM is configured to receive and modulate the portion of the illumination light transmitted through the optical assembly, and to output the modulated light. A method performed by the display device is also disclosed.