Abstract: A lens assembly comprises a first lens, a second lens, a third lens, a fourth lens, a sixth lens, a seventh lens and an eighth lens which are arranged sequentially from an object side to an image side along an optical axis. The first lens is a meniscus lens with negative refractive power and comprises a convex surface facing an object side and a concave surface facing an image side. The second lens is with negative refractive power. The third lens is with refractive power. The fourth lens is with positive refractive power. The fifth lens is with positive refractive power and comprises a convex surface facing the image side. The sixth lens is with refractive power. The seventh lens is with positive refractive power. The eighth lens is with refractive negative power and comprises a concave surface facing the object side.

Abstract: The invention concerns a diffractive waveguide element for a personal display device, the element comprising a waveguide body (21), and at least two grating regions (23, 24) arranged on the waveguide body (21), at least some of the grating regions adapted to expand the exit pupil of the element. According to the invention, the grating regions (23, 24) are positioned with respect to each other so that and are provided with gratings having different grating vectors so that the grating regions (23, 24) interact to combine the functions of exit pupil expansion and outcoupling on at least some parts of the element. The invention allows for efficient use of waveguide area.

Abstract: An optical light package includes an optical output lens, an optical filter located thereunder and between the output lens and LEDS, a tray of LEDs arrayed on a stage mounted on a linear comb based MEMS device that is distributed in such a way that the stage is movable, and a driver that controls movement of the stage.

Abstract: A shortwave to midwave infrared (SWIR-MWIR) optical window includes a substrate formed from a nanocomposite optical ceramic material and a coating disposed on the substrate to provide electromagnetic interference (EMI) protection. The coating is electrically conductive and SWIR-MWIR transparent and comprises a doped zinc oxide material. A method of protecting an EO/IR sensor from electromagnetic interference (EMI) includes depositing a thin film electrically conductive and SWIR-MWIR transparent coating over a surface an optical window of the EO/IR sensor. The optical window is formed from a nanocomposite optical ceramic material and has a curved surface. The thin film electrically conductive and SWIR-MWIR transparent coating comprises an electrically conductive zinc oxide material.

Abstract: A compact eyeprint imaging device is provided. The device includes a plano-convex lens, a right angle triangular prism, a micro lens array, an imaging detector and an external package. The plano-convex lens and the micro lens array are glued on an inclined face of the right angle triangular prism and two right angle faces of the right angle triangular prism are coated with reflecting films, so as to form an integrated combined optical unit, which is inserted into the external package together with the imaging detector. The device is wholly installed on a glasses frame. Light emitted by the eyeprint passes through the plano-convex lens to form parallel light beams, which are reflected twice through the two right angle faces of the right angle triangular prism and then focused through the micro lens array, so as to form a multi-aperture eyeprint image array on the imaging detector.

Abstract: A display system includes an optical system and a curved display disposed to emit light toward the optical system. The optical system includes at least a first optical lens, a partial reflector and a reflective polarizer. The optical system has an optical axis such that a light ray propagating along the optical axis passes through the first optical lens the partial reflector and the reflective polarizer without being substantially refracted. At least one major surface of the optical system can be rotationally asymmetric about the optical axis. A major surface of the optical system may have a first portion defined by a first equation and a second portion adjacent the first portion defined by a different equation. The first optical lens may have a contoured edge adapted to be placed adjacent an eye of a viewer and substantially conform to the viewer's face.

Abstract: The present invention provides a lens barrel capable of changing the aperture diameter according to a zoom position while having a short length. A lens barrel 1 according to the present invention comprises: a aperture unit 20 having a cam follower 21a; and a moving tube 7 having a cam groove 7b for engaging the cam follower 21a, the moving tube being provided at the outer circumference of the aperture unit 20 and able to move along the optical axis direction.

Abstract: The present invention discloses a fiber optic connector comprising a housing, a spring, a ferrule assembly and a crimping seat. Before being inserted into the housing, the ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. The spring is pre-assembled into the housing before the ferrule assembly is inserted into the housing. After the pre-assembled ferrule assembly and crimping seat are inserted into the housing, the crimping seat is snap-fitted in the housing, and the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat. Before inserted into a housing of the fiber optic connector, some components may be pre-assembled together to form an integral assembly having a size less than that of a housing of the fiber optic connector. Accordingly, the integral assembly may be smoothly pulled through a small long pipe.

Abstract: Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a source of image modulated light; a waveguide having an eye-facing surface and an external surface facing the outside world; an input coupler for coupling the light into a total reflection internal path in the waveguide; at least one grating for providing beam expansion and extracting light from the waveguide towards an eyebox; a polymer grating structure comprising a modulation depth and a grating pitch. The modulation depth is greater than the grating pitch across at least a portion of the polymer grating structure. Advantageously, the polymer grating structure is configured to diffract light entering the waveguide from the outside world or stray light generated within the waveguide away from optical paths that are refracted through the external surface into the outside world.

Abstract: The present disclosure discloses an optical imaging system, along an optical axis from an object side to an image side, sequentially includes: a first lens having negative refractive power; a second lens having positive refractive power, and an object-side surface of the second lens being a convex surface; a third lens having refractive power; and a fourth lens having refractive power, and an object-side surface of the fourth lens being a concave surface. A total effective focal length f of the optical imaging system and half of a maximum field-of-view Semi-FOV of the optical imaging system satisfy: f×tan(Semi-FOV)?4.0 mm; and the total effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD<2.35.

Abstract: A multiview display employs an array of multibeam elements configured to provide directional light beams having different principal angular directions corresponding to different view directions of the multiview display. Moreover, the multiview display includes an array of light valves configured to modulate the directional light beams as a multiview image to be displayed by the multiview display, where a multiview pixel of the multiview display includes a set of light valves of the light valve array corresponding to a multibeam element of the multibeam element plurality and being configured to modulate directional light beams from the multibeam element. Furthermore, a shape of the multiview pixel is dynamically reconfigurable to provide the multiview image having a dynamic field of view (FOV). The FOV may be modified based on a monitored orientation of the multiview display, a monitored position of a user relative to the multiview display, or both.

Abstract: An optical unit is provided and includes: a movable body having an optical module; a fixed body; a support mechanism turnably supporting the movable body with respect to the fixed body; a flexible circuit board whose one end is connected with a connection part provided in the movable body and which is disposed on a side in a first intersecting direction intersecting an optical axis direction with respect to the movable body; and a positioning part being disposed on the side in the first intersecting direction with respect to the movable body and positioning an other end of the flexible circuit board in the optical axis direction. The flexible circuit board is folded to be overlapped with each other when viewed in the optical axis direction. A position in the optical axis direction of a turning axis is located within a range from the connection part to the positioning part.

Abstract: A driving mechanism is provided for moving an optical element, including a fixed module, a movable module holding the optical element, a driving assembly for driving the movable module to move relative to the fixed module, a position-sensing element, and a 3D circuit. The fixed module has a base, and the position-sensing element is disposed on the base to detect the movement of the movable module relative to the fixed module. The 3D circuit is embedded in the base and electrically connected to the position-sensing element.

Abstract: The present disclosure relates to an image generator device (100) for changing the direction of at least one emitted light cone at a surface (113), comprising an image generator (130) and a fibre optical faceplate (110) having a first (112) and a second surface (113), the fibre optical faceplate (110) being arranged to transmit light from the image generator (130) so at least a part of light entering the first surface (112) of the fibre optical faceplate (110) exits through the second surface (113) of the fibre optical faceplate (110) and pass through an aperture, wherein the fibre optical faceplate (110) comprises a multitude of optical fibres (111) and light exiting the second surface (113) through optical fibres (111) each form an emitted light cone.

Abstract: The optical system includes, a first lens having a positive refractive power, an object side surface thereof being convex near an optical axis, and an image side surface thereof being concave near the optical axis; a second lens having a negative refractive power, an object side surface thereof being convex near the optical axis, and an image side surface thereof being concave near the optical axis; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power, an object side surface thereof being convex near the optical axis; a seventh lens having a negative refractive power, an object side surface thereof being convex near the optical axis, and an image side surface thereof being concave near the optical axis; the optical system satisfies the following condition: 1?TTL/ImgH?1.12.

Abstract: A reinforcement sleeve heating device is a reinforcement sleeve heating device heating a reinforcement sleeve put on a connecting site to shrink the reinforcement sleeve in order to reinforce the connecting site of optical fibers fusion-spliced to each other. The reinforcement sleeve heating device includes: a heating element forming a housing space, the housing space extending in a predetermined direction, the housing space being opened in one direction intersecting with the predetermined direction, the housing space being capable of disposing the reinforcement sleeve, and a cover disposed at a position at which at least a part of the opening of the housing space. In a state in which the reinforcement sleeve is disposed in the housing space, the cover includes a contact surface brought into contact with the reinforcement sleeve in a direction of pushing the reinforcement sleeve into an inside of the housing space.

Abstract: An optical lens assembly includes at least two optical lens elements. At least one of the optical lens elements includes a long wavelength absorbing material, the optical lens element including the long wavelength absorbing material is made of a plastic material, and the long wavelength absorbing material is evenly mixed with the plastic material. At least one of the optical lens elements includes a long wavelength filter coating, the optical lens element including the long wavelength filter coating is made of a plastic material, and the long wavelength filter coating is arranged on an object-side surface or an image-side surface of the optical lens element. The long wavelength filter coating includes a plurality of high refractive index coating layers and a plurality of low refractive index coating layers, and the high refractive index coating layers and the low refractive index coating layers are stacked in alternations.

Abstract: Provided is a monitor device used with a Fabry-Perot interference filter having a pair of mirror parts and a pair of driving electrodes, and having a distance between the mirror parts changed in accordance with charges stored between the driving electrodes. The monitor device includes: a current application unit that applies an AC current having a frequency higher than a resonant frequency of the mirror parts across the driving electrodes; a voltage detection unit that detects a temporal development of a voltage generated between the driving electrodes during application of the AC current; a control unit that controls the AC current across the driving electrodes, based on an evaluation of a DC component of the voltage detected by the voltage detection unit; and a monitor unit that monitors the distance between the mirror parts based on an AC component of the voltage detected by the voltage detection unit.

Abstract: Systems and methods for incoupling light into a waveguide. A system includes a transfer optic and an optical scanner being configured to receive light from an optical engine. The optical scanner includes a first scan mirror positioned close to the transfer optic. The system further includes a waveguide with an incoupler positioned close to the transfer optic, which is configured to direct the light from the optical engine to the first scan mirror and to transmit light reflected from the first scan mirror to one of a second scan mirror or the incoupler of the waveguide.

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-3), (i-6) to (i-8), and (i-10) to (i-13).