Abstract: The presently disclosed subject matter relates to devices and methods for reflective and holographic displays. In particular, the presently disclosed subject matter provides a device comprising a first layer, a second layer for reflecting light, and at least one metal disposed on the second layer. The first layer can include a partially reflective membrane and can be coupled to the at least one metal. The first layer and the second layer can be separated by a gap ranging from about 10 nm to about 1000 nm in size.

Abstract: This polarization plate is a polarization plate with a wire grid structure, having a transparent substrate, a plurality of projections which are formed on a first surface of the transparent substrate, extend in a first direction, and are arrayed at a pitch that is shorter than the wavelength of the used light region, and an antireflection layer which is formed on a second surface of the transparent substrate on the opposite side from the first surface, wherein surfaces of the plurality of projections and a surface of the antireflection layer are covered with protective films respectively formed from a second dielectric material.

Abstract: An optical thin film filter may include a first set of filter layers with a first refractive index. The optical thin film filter may include a second set of filter layers with a second refractive index. A first set of thicknesses of the first set of filter layers, a second set of thicknesses of the second set of filter layers, the first refractive index, and the second refractive index may be configured to cause the optical thin film filter to achieve less than a threshold angle shift at a particular wavelength. The optical thin film filter may have an effective refractive index greater than or equal to 95% of a refractive index of a highest refractive index component material of the optical thin film filter.

Abstract: A deep learning-based digital holographic continuous phase noise reduction method for microstructure measurement is provided. A MEMS microstructure is simulated to generate an object phase image through generation of random matrix superposition, noise in a digital holographic continuous phase map is simultaneously simulated to generate a noise grayscale image, and a simulation data set is thus created. An end-to-end convolutional neural network is designed, and a trained convolutional neural network is trained and obtained. A holographic interference pattern of an object under measurement is collected by photographing, and after spectrum extraction, angular spectrum diffraction, phase unwrapping, and distortion compensation, a continuous phase map containing only the object phase and noise is obtained and input into the trained convolutional neural network to obtain an object phase map.

Abstract: Provided is a lens unit that is for an infrared region and that allows occurrence of a tilt error to be easily suppressed. A lens unit (4) is a lens unit which is used for an infrared region that includes at least any one of wavelengths in a range of 7 ?m to 14 ?m, and includes: at least one lens (1, 2, 3) that has a surface on which a coating film is formed; a lens barrel (6) that has a hole (61, 62, 63) in which the at least one lens is fitted; a ring part (65, 66, 67) that is a member which is in contact with a circumferential edge part (1c, 2c, 3c) of the at least one lens and which is for causing the at least one lens fitted in the hole to be located at a given position on an optical axis of the lens barrel (6) or fixing, at a given position on the optical axis of the lens barrel, the at least one lens fitted in the hole.

Abstract: A system may include a first polarizer to create polarized light having a polarization, a substrate that maintains the polarization and allows a first pass-through of the polarized light, and a graphic layer that maintains the polarization and allows a second pass-through of the polarized light, the graphic layer including a first image. The system may include a second polarizer separate from the substrate and the graphic layer and configured to enable a visualization of a second image different than the first image. The graphic layer may include perforations to allow the second pass-through of the polarized light. The first polarizer and substrate may be embodied in a display. The graphic layer may be placed on the display, such as on the substrate.

Abstract: An optical system includes a lightguide and an image projecting arrangement. The image projecting arrangement includes a polarizing-beam-splitter prism having a diagonal polarizing beam splitter surface reflecting light from an image-generating matrix to reflective collimating optics. A coupling prism is deployed between the polarizing beam splitter surface and a lightguide entrance, providing a coupling surface that is coplanar with, or parallel to, one of the parallel major surfaces of the lightguide. A reference length RL is defined as a distance along the optical axis from a principal plane of the collimating optics to the polarizing beam splitter surface. Both a first light path from the image plane to the principal plane and a second light path from the principal plane to the lightguide entrance have a length less than 3×RL.

Abstract: An exit pupil expander (EPE) has entrance and exit pupils, a back surface adjacent to the entrance pupil, and an opposed front surface. In one embodiment the EPE is geometrically configured such that light defining a center wavelength that enters at the entrance pupil perpendicular to the back surface experiences angularly varying total internal reflection between the front and back surfaces such that the light exiting the optical channel perpendicular to the exit pupil is at a wavelength shifted from the center wavelength. In another embodiment a first distance at the entrance pupil between the front and back surfaces is different from a second distance at the exit pupil between the front and back surfaces. The EPE may be deployed in a head-wearable imaging device (e.g., virtual or augmented reality) where the entrance pupil in-couples light from a micro display and the exit pupil out-couples light from the EPE.

Abstract: Optical devices having multi-functional coatings.

Abstract: A partial reflector including a plurality of optical repeat units where each optical repeat unit includes first and second polymer layers is described. A refractive index difference between the first and second polymer layers along a first axis may be ?ny, a refractive index difference between the first and second polymer layers along an orthogonal second axis may be ?nx, where |?nx| is at least 0.1 and |?ny| is no more than 0.04. The optical repeat units may have a smallest optical thickness T1 proximate a first side of the optical stack and a largest optical thickness T2 proximate an opposite second side of the optical stack, where (T2?T1)/(T2+T1) can be a range of 0.05 to 0.2, and T2 can be at least 350 nm and no more 1250 nm. The partial reflector may be used in a circular polarizer for correcting color shift with view angle in a display.

Abstract: A polarization film includes: a base substrate in which a folding axis and a stretched axis are defined; and a deformation portion located at an edge of the base substrate. The stretched axis forms an angle of less than about 45° with respect to the folding axis. The display device, in which a folding area at which a folding axis is located and a non-folding area neighboring the folding area are defined, includes a display panel; a first adhesive layer on the display panel; and a polarization film on the first adhesive layer, where a stretched axis is defined in the polarization film. An angle between the folding axis and the stretched axis is less than about 45°.

Abstract: Embodiments of this application provide a camera module and an electronic device. The camera module is configured to be mounted in the electronic device. The camera module includes a bracket, an optical image stabilization motor, an automatic focus motor, a reflecting prism, a camera lens, and a lens holder. The reflecting prism is disposed in the optical image stabilization motor, the camera lens is disposed in the automatic focus motor, and the camera lens is connected to the lens holder. The optical image stabilization motor, the automatic focus motor, and the lens holder are disposed within the bracket and are sequentially arranged in a first direction. The first direction is an optical axis direction of the camera lens, and a plane on which the lens holder is located is disposed perpendicular to the optical axis direction.

Abstract: A camera module includes a lens module including at least one lens, a housing accommodating the lens module, and a driving magnet including first and second magnets disposed on the lens module at an interval. The lens module is supported by the housing with a ball member interposed therebetween. The ball member includes two ball members disposed between inner sides of the first and second magnets in an optical axis direction. The first and second magnets are both disposed on one surface of the lens module.

Abstract: The disclosure introduces a technique to expand the aperture of an optical system like an Autocollimator by interconnecting two or more rhomboidal prisms in a sequential manner. This method involves securing the initial rhomboid to the autocollimator's aperture using a rotating component at its base. Subsequently, a second rotating component is attached to the exit end of the first rhomboid, enabling individual rotation for both rhomboids. These prisms are coated with distinct partial mirror coatings. The processing of the reflected image from these rhomboids are conducted to ascertain the deviation in the line of sight caused by their presence and positioning. A microprocessor computes the measurement of the back reflected beams concerning the rhomboids' positions, determining beam deviations resulting from imperfections in the manufacturing of the rhomboids.

Abstract: A light control film includes a first portion and a second portion laminated to the first portion. The first portion includes a first functional substrate and a plurality of first louvers formed on the first functional substrate. The first functional substrate includes at least one of an optically active layer and a barrier layer. The second portion includes a second functional substrate disposed distal to the first functional substrate and a plurality of second louvers formed on the second functional substrate. The second functional substrate includes at least one of an optically active layer and a barrier layer. The plurality of first louvers extend along a first direction and the plurality of second louvers extend along a second direction. The first direction and the second direction are inclined to each other at an angle that lies within a range from about 70 degrees to about 110 degrees.

Abstract: The present application provides a light-ray modulating element, an eyeglass and a 3D displaying system. The light-ray modulating element is applied to a 3D displaying system, the 3D displaying system includes a 3D displaying device, and the 3D displaying device includes a display panel, and a lens unit disposed at a light exiting side of the display panel; light rays emitted by the display panel pass through the lens unit, are shot to the light-ray modulating element, and form two first viewpoint units at a light entering side of the light-ray modulating element, wherein each of the first viewpoint units includes at least two first viewpoints; and the light-ray modulating element is configured for converging light rays emitted by each of the first viewpoint units to form a second viewpoint unit.

Abstract: A transparent wear-resistant, in particular scratch and/or impact-resistant, element is provided. The element includes a substrate, a layer system on a first surface of the substrate, and a reflectance at a second surface of the substrate of 2% in a visible spectral range of wavelengths from 380 nm to 780 nm. The glass or glass ceramic substrate is transparent in the visible spectral range. The layer system has two successive layers deposited on the first surface, where the two successive layers are each made of inorganic compounds. The two successive layers include a first layer with a first refractive index (n1) and a second layer with a second refractive index (n2), where the second refractive index (n2) is a value of at least 1.60. The first refractive index (n1) is greater than the second refractive index (n2) and a difference of the first and second refractive indices (n1?n2) is at least 0.05.

Abstract: In one aspect, a night vision recording and display module for removably attachment to night vision monocular device is provided. In another aspect, a night vision recording and display module further includes an integrated camera, preferably a thermal camera, which produces a video image which can be superimposed with the night vision display output. In yet further aspects, combinations or kits comprising the modular night vision systems disclosed herein in combination with the night vision devices are provided.

Abstract: Methods and systems are provided for an automatic lens cleaning system incorporated into a system. The system includes an imaging device, a reversibly coupled table configured to reversibly couple to the imaging device, a communication interface including a first lens of the imaging device and a second lens of the reversibly coupled table, and the automatic lens cleaning system. The automatic lens cleaning system includes a bellow positioned at a coupling interface between the imaging device and the reversibly coupled table, and at least one nozzle fluidly coupled to the bellow and configured to direct a flow of gas towards at least one of the first lens or the second lens.

Abstract: Provided are a display apparatus, a method for controlling a display apparatus, and a holographic three-dimensional (3D) display screen. The display apparatus includes a display module and an adjustment module. A deflection device of the display module is configured to make an image move at least in a first direction. An actuation device of the adjustment module is configured to move or rotate the display module so that the image moves at least in a second direction. The actuation device is added in the display apparatus. The deflection device is controlled to follow the movement direction of the human eye to make the image move in at least a part of the component directions of the movement direction of the human eye on the plane where the deflection device is disposed.