Abstract: A display apparatus comprises a display panel and a reflection member. The display panel comprises an array of pixels, the array having a quadrangular shape. The reflection member is disposed in a position not to overlap at least a portion of the array when viewed in a normal direction substantially perpendicular to a major surface of the display panel, the reflection member being configured to reflect light that is emitted from the display panel in a direction slanted with respect to the normal direction. The combination of light emitted from the display panel in the normal direction and the reflected light is configured to form an image having a shape other than a quadrangular shape.

Abstract: A support structure for an optical reflecting telescope including a beam inlet a primary support for a primary mirror, a secondary support for a secondary mirror, struts which extend between the primary support and the secondary support, and a beam outlet. The support structure has a contour of a single shell hyperboloid. The primary support, the secondary support and the struts are configured so that they support the primary mirror and the secondary mirror so that a z-shaped beam path is provided between the beam inlet, the primary mirror, the secondary mirror and the beam outlet. The struts have identical length.

Abstract: A display device comprising a radiation source and a glazing unit is disclosed. The glazing unit comprises a glazing function substrate and a coating that prevents reflection of incident monochromatic laser radiation emitted by the radiation source, which scans a portion of the gazing unit. The coating comprises a stack of two layers, namely, a first layer made of a material based on zinc oxide, tin oxide, silicon nitride, zinc tin oxide or zirconium silicon oxide; and a second layer made of a material based on a silicon oxide, in which the respective geometric thicknesses Ep1 and Ep2 of the layers are substantially equal to: Ep1=26+0.07(?)?0.007(?)2??(1) Ep2=83?0.1(?)+0.01(?)2??(2), in which ? is the mean angle of orientation of incident monochromatic laser radiation to the normal to the glazing unit in the scanned portion thereof.

Abstract: Aspects of the present disclosure are directed to providing and/or controlling electromagnetic radiation. As may be implemented in accordance with one or more embodiments, an apparatus includes a first structure that contains an object, and a second structure that is transparent at solar wavelengths and emissive in the atmospheric electromagnetic radiation transparency window. The second structure operates with the first structure to pass light into the first structure for illuminating the object, and to radiatively cool the object while preserving the object's color.

Abstract: A lens module includes a lens barrel having a top wall that has a bottom surface, and a lens group received by the lens barrel. The lens group includes a first lens adjacent to the top wall and a second lens attached to the first lens. A first complementary configuration is arranged between the first lens and the top wall of the lens barrel for ensuring a concentricity between the lens group and the lens barrel, and a second complementary configuration is arranged between the first lens and the second lens for ensuring a concentricity between the first lens and the second lens.

Abstract: A lens module includes a lens barrel having a top wall that has a bottom surface, and a lens group received by the lens barrel. The lens group includes a first lens adjacent to the top wall and a second lens attached to the first lens. A first complementary configuration is arranged between the first lens and the top wall of the lens barrel for ensuring a concentricity between the lens group and the lens barrel, and a second complementary configuration is arranged between the first lens and the second lens for ensuring a concentricity between the first lens and the second lens.

Abstract: A display device has a first, see-through mode of operation (30), (34) in which the display panel does not emit light and the display device blocks the light of a first polarization (state A) but allows light of a second polarization (state B) to pass through in both opposite directions. In a second, 3D display mode, the emissive pixels output light of the first polarization (state A) from the display output face and a view forming arrangement forms multiple views (36) in one output direction.

Abstract: A double-vision-device alignment device and a double-vision-device alignment method are provided. The double-vision-device alignment device is configured to accurately align a display panel with a double-vision device, and comprising: a first chromaticity detecting unit, configured to detect a color in a first viewing region; a second chromaticity detecting unit, configured to detect a color in a second viewing region, wherein the first viewing region and the second viewing region are formed by light splitting of the double-vision device, and the first viewing region and the second viewing region correspond to different display regions of the display panel, respectively. It is judged whether an alignment is accurate by detection of a chromaticity detecting unit, which can prevent an alignment result from being affected by human factors, improve accuracy and efficiency, and reduce labor intensity, and the device can be operated by non-professionals.

Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. In some examples, a skew mirror has substantially constant reflective axes across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.

Abstract: A compact low-cost imaging lens with an F-value of 2.5 or less which achieves both low-profileness and a wide field of view and corrects various aberrations properly. It includes elements arranged from an object side to an image side as follows: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power having a concave object-side surface; a third lens with positive refractive power having convex object-side and image-side surfaces and having at least one aspheric surface; a fourth lens with positive refractive power as a double-sided aspheric lens having a convex image-side surface; and a fifth lens with negative refractive power as a double-sided aspheric lens having a concave image-side surface. The imaging lens satisfies a conditional expression 20<?d1??d2<50, where ?d1 denotes Abbe number of the first lens at d-ray, and ?d2 denotes Abbe number of the second lens at d-ray.

Abstract: A laminate body (1) is provided with a transparent substrate (10) and a refractive layer (11) which refracts incident light towards the top of the substrate (10). The refractive layer (11) contains, at least, one kind of fluorine compound (ss) selected from a group consisting of fluoro-silsesquioxane and fluoro-silsesquioxane polymers, and a resin (pl) having a refractive index higher than that of the aforementioned fluorine compound (ss). Of the side of the substrate (10) (the side of the back surface s2) and the side opposite thereof (the side of the front surface s1), the concentration of the fluorine compound (ss) in the refractive layer (11) is higher on said side opposite (the side of the front surface s1), and the refractive layer (11) forms a graded structure layer of high refractive indices and low refractive indices inside the layer.

Abstract: Provided is an observation optical system including: an objective lens; an image inverting unit; and an ocular lens, the objective lens including, in order from object side to observation side: a positive first lens unit; a negative second lens unit; and a positive third lens unit, wherein the first lens unit consists of a positive front unit and a positive rear unit separated by an air interval, which is largest along optical axis, wherein the second lens unit moves to have a component orthogonal to optical axis for image blur correction, and wherein a lateral magnification of second lens unit, a curvature radius of a lens surface of second lens unit closest to observation side, a curvature radius of a lens surface of third lens unit closest to object side, the air interval between front and rear units, and a focal length of first lens unit are appropriately set.

Abstract: The near-infrared reflective film has, on a base material, a high refractive layer containing a water-soluble polymer and a metal oxide particle having a refractive index higher than the refractive index of the water-soluble polymer, and a low refractive layer containing a water-soluble polymer and a metal oxide particle having a refractive index lower than the refractive index of the water-soluble polymer are alternately laminated individually in two or more layers. The total number of the layers of the high refractive layer and the low refractive layer is n. The total film thickness of the component layers from the region of n/2 to the base material is ?d1, and the total film thickness of the component layers from the region of n/2 to the outermost layer is ?d2. The film thickness ratio ?d1/?d2 is from 1.05 to 1.80.

Abstract: A finder is a reverse Galileo type finder comprising, in order from the object side to the eye point side: an objective lens group having a negative refractive power; and an eyepiece lens group having a positive refractive power. The distance between the objective lens group and the eyepiece lens group is the longest distance from among distances between lenses, as an air converted length, in an observation optical system from the objective lens group to the eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power. The first lens and the third lens are fixed while the second lens moves in the direction of the optical axis during diopter adjustment.

Abstract: An antireflection film, comprising a film including: hollow particles; and a binder bonding the particles, wherein: the binder contains voids; and the binder contains 10 or less voids each having a cross-sectional area of 1,000 nm2 or more with respect to 1 ?m2 of a cross-sectional area of the binder. A method of producing the film, comprising: forming a paint into a film by applying the paint onto a substrate, the paint containing hollow particles, a binder, and a solvent, in which a content of the particles is 50-85 wt % and a content of the binder is 15-40 wt % with respect to a total weight of a solid content of the paint, and the paint has a viscosity of 1.3-2 mPa·s at its film-forming temperature; and drying the film.

Abstract: A zoom lens has, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; and a fourth lens group having positive refractive power. Zooming is performed by changing an air gap between the lens groups. The fourth lens group includes, in order from the object, a first positive lens component, a second positive lens component having a convex surface facing the object, and a negative lens component. A specified conditional expression is satisfied.

Abstract: A three-piece optical lens for capturing image and a three-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: A display device includes a first substrate having a display region and a peripheral region, a display structure in the display region, a second substrate parallel to the first substrate, the second substrate including a light scattering structure in the display region, the light scattering structure being configured to scatter light generated in the display structure, and a shielding member adjacent to the light scattering structure.

Abstract: A stereoscopic display device is provided. The stereoscopic display device comprises: a display panel (100), comprising a plurality of first display units (101) and a plurality of second display units (102) which are alternately arranged; and a grating (200) positioned on a light exiting side of the display panel (100) and including a plurality of light-transmitting regions (a) and a plurality of light-shielding regions (b), wherein the stereoscopic display device comprises a lens (300) with a light divergence action at a position corresponding to each of the light-transmitting regions (a) of the grating (200). Therefore, when the stereoscopic display device is viewed at a short distance, a mechanical performance of the stereoscopic display device is improved.

Abstract: A transparent adhesive sheet for optics, which is capable of satisfying both adhesion and rework property, in view of the above problems of prior art. A production method of a silicone-based transparent adhesive sheet for optics for assembling the optical components, includes a step of forming a surface activation treated surface, in which peel strength after laminating onto an adherend increases with time, as compared with peel strength before lamination. The surface activation treatment is performed by using UV-ray irradiation on at least a part or the entire surface of an adhesive face contacting with the adherend of said transparent adhesive sheet for optics.