Abstract: A compact augmented reality (AR) display system is described herein. The AR display system includes an eyeglass frame and a pair of near-eye pupil forming catadioptric optical engines mounted to the eyeglass frame. The pair of near-eye pupil forming catadioptric optical engines are mounted to the eyeglass frame and spaced along the longitudinal axis. Each of the near-eye pupil forming catadioptric optical engines includes an image generator forming a 2D image, an optical imaging assembly, and an optical image relay assembly, which includes the image generator and the lenses or other optics to present the image correctly to the user. The pair of near-eye pupil forming catadioptric optical engines enable viewing the 2D image binocularly in 3D.

Abstract: An optical combination device for projecting an image onto an impingement region. The device includes at least a first and a second layer which are mutually spaced apart at a distance. The first layer has a shorter distance to the impingement region than the second layer. The first layer has at least two functional regions which are mutually spatially separate. The first and the second layers are formed to transmit a portion of the beam, which is incident on a first functional region, in the direction of the second layer, and to propagate the transmitted portion between the first and second layers at least partially along a direction of extent of the at least two layers, and to provide the at least partially propagated beam as outgoing beam in the direction of the impingement region via a second functional region of the first layer.

Abstract: Head-worn computers with eye-imaging systems include a camera system positioned in a head-worn computer, wherein the camera system is further positioned to capture eye-image light that originates as reflections from a user's eye, wherein the camera system is further positioned to capture eye-image light as a reflection from a partially reflective surface that is positioned in front of an image display in the head-worn computer, wherein image light, from the image display, is transmitted through the partially reflective surface. A processor is adapted to cause the camera system to capture the eye-image light. The processor is further adapted to cause a comparison of the captured eye-image light with a pre-stored eye image of a known user of the head-worn computer. In the event the comparison confirms the identity of the known user, the user is granted permission to view content to be presented in a display of the head-worn computer.

Abstract: An image display apparatus that makes it possible to improve the tracking accuracy, while making the image display apparatus smaller in size. An image display apparatus includes a light source section that emits image display light OL used to display an image, and light CL conjugate to the image display light OL; an optical system that projects the image display light OL emitted by the light source section onto a pupil of an eye of a user, and projects the conjugate light CL emitted by the light source section onto a portion around the pupil of the eye of the user; a detector that detects reflected light that corresponds to the conjugate light CL projected by the optical system to be reflected off the portion around the pupil; and a controller that controls a position of a display-target image on the basis of the reflected light detected by the detector.

Abstract: A meteorological lidar performs highly precise meteorological observation by primarily removing elastically scattered light and by detecting rotational Raman-scattered light without filtering it out. The meteorological lidar according to embodiments measures scattered light of a laser beam, and includes: a diffraction grating diffracting rotational Raman-scattered light contained in scattered light in accordance with the wavelength of rotational Raman-scattered light; a detector detecting the diffracted rotational Raman-scattered light; and a removing element primarily removing elastically scattered light of a specific wavelength contained in the scattered light.

Abstract: A system including a steerable mirror, a waveguide, first optics, intermediate optics, and final optics. The system includes a first light path for a foveal image element, the first light path including the first optics, the steerable mirror to steer a position of the foveal image element to a particular orientation, intermediate optics, and the final optics to direct the foveal image element to an in-coupling region of the waveguide. The system further includes a second light path for a field image element, the second light path including final optics.

Abstract: A spreading optics system distributes electromagnetic (EM) waves emitted by an emitter having an emission vector. The spreading optics system includes reflective surfaces. The reflective surfaces include concave first reflector having a concave cross section in a plane substantially perpendicular the emission vector. The reflective surfaces further include a convex second reflector arranged further from the emitter than the concave first reflector. The convex second reflector has a convex cross section in a second plane substantially parallel the first plane. The reflective surfaces are configured to divergently redirect the EM waves into a vector fan at a predetermined angle relative to the emission vector.

Abstract: A method for providing position information for controlling at least one function of an environment provided with an environment coordinate system comprises the steps of receiving image information associated with at least one image of at least one part of the environment captured by a camera of a mobile device, the mobile device being separate from the environment, determining a position associated with the mobile device in the environment coordinate system according to the image information associated with the at least one image, and providing position information indicative of the position associated with the mobile device in the environment coordinate system to control at least one function of the environment according to the position. There is also provided a method and system which provides movement information indicative of a movement associated with the mobile device relative to the environment coordinate system to control at least one function of the environment according to the movement.

Abstract: A virtual image display device includes: a projection member that projects an image; and a projection optical system that forms a virtual image. A virtual image distance from an observer to the virtual image is not less than 2,500 mm. The projection optical system has one or more reflectors. A reflection surface of a final reflector that is included in one or more reflectors and finally reflects a light ray satisfies the following Conditional Relation 1: 10°?|?z max??z min|?30°??Conditional Relation 1 where ?z is an angle between a normal vector perpendicular to a tangent plane passing through an origin of the final reflector and a normal vector with respect to a tangent plane at any given point on the final reflector, ?z max is a maximum value of ?z, and ?z min is a minimum value of ?z. This arrangement provides a small-size virtual image display device.

Abstract: The present invention as described herein is a compact and portable ballet training station or kit. The training station comprises a collapsible bane with supporting bases, a foldable ballet mat, a folding mirror, and a compact carrying case. The collapsible barre is comprised of three bars, each bar with semi detachable segments positioned equidistant along each bar. Upon assembly the bars connect to each other to form a bane which is supported by bases. The foldable mat is made of one contiguous flexible matter which is sufficient to support and cushion the weight of a ballerina. The foldable mirror is made of one contiguous material capable of being coated with reflective material on one side and opaque material on the opposing side. These components are collapsed or folded into a hard shell quadrilateral shaped carrying case for easy storage and transport.

Abstract: A method and system for generating electrical energy, comprises a plurality of photovoltaic panels positioned in a core area, a plurality of ground mirrors positioned in a plurality of land areas and a plurality of reverse mirror systems held at each of the plurality of reflection centers for increasing the amount of solar energy falling on the core area. Each of the plurality of reverse mirror systems further comprises a high rising cylindrical pole having a hollow horizontal support and a vertical support, a plurality of adjustable supports and a reverse mirror placed in a mirror support frame and rigidly or hingedly connected to the vertical support. The plurality of ground mirrors and the plurality of reverse mirror systems are positioned to maximize the concentration of solar energy falling on the plurality of photovoltaic panels and thereby to increase the amount of electric energy produced.

Abstract: A device and method and system for utilizing confocal measurement and an optical arrangement to produce 3D color images. A color measurement optical path and a 3D measurement optical path may coincide at least at an object side of the device, and a minimal amount of light is extracted from a monitoring beam for color measurement without affecting 3D measurement.

Abstract: A general purpose image and visual effects display apparatus, with associated methods, which is comprised of an array of independently angled reflective or refractive elements wherein the varying angle pattern of each element across said array is designed to reflect or refract specifically designed as well as fortuitously located existing colors, in precisely determined patterns, to make apparent to specific viewing or receiving locations a wide range of complex emergent visual and other effects. In some embodiments very high resolution and high color fidelity image display is possible. In other embodiments moving images akin to video can be displayed, using no electronics or moving parts. In other embodiments true binocular 3D images can be displayed directly to viewers, without the need for special 3D viewing glasses. Many of the embodiments and methods are applicable to non-visible light and other reflectable wave-based phenomena.

Abstract: An internal check mirror for an overhead bin comprises a Fresnel mirror having a convex mirror function which comprises a substrate of a transparent resin, a plurality of minute grooves having V-shaped cross-sections formed on a back surface side of the substrate, a reflective film covering a surface of the plurality of minute grooves and a protective layer covering the reflective film. A thickness of the Fresnel mirror is from 0.1 to 1.0 mm and a radius of curvature based on inclined surfaces of the plurality of the minute grooves is from 200 to 1000 nm. The Fresnel mirror has a width direction dimension of from 200 to 800 mm and a longitudinal directional dimension of from 150 to 600 mm.

Abstract: Methods, systems and devices for using charged particle beams (CPBs) to write different die-specific, non-volatile, electronically readable data to different dies on a substrate. CPBs can fully write die-specific data within the chip interconnect structure during the device fabrication process, at high resolution and within a small area, allowing one or multiple usefully-sized values to be securely written to service device functions. CPBs can write die-specific data in areas readable or unreadable through a (or any) communications bus. Die-specific data can be used for, e.g.: encryption keys; communications addresses; manufacturing information (including die identification numbers); random number generator improvements; or single, nested, or compartmentalized security codes. Die-specific data and locations for writing die-specific data can be kept in encrypted form when not being written to the substrate to conditionally or permanently prevent any knowledge of said data and locations.

Abstract: Certain embodiments pertain to laser-based Fourier ptychographic (LFP) imaging systems, angle direction devices used in the LFP imaging systems, optical switches used in the LFP imaging systems, and LFP imaging methods. The LFP systems include an angle direction device for directing laser light to a sample plane at a plurality of illumination angles at different sample times. The LFP systems also include an optical system and a light detector. The optical system receives light issuing from the sample being imaged and propagates and focuses the light to the light detector acquiring raw intensity images.

Abstract: A motor vehicle lighting system including: a lighting device capable of emitting a light beam, a projection device having a projection lens, and an array of micro-mirrors having micro-mirrors mounted in a pivoting manner about a pivot axis. Each micro-mirror is capable of pivoting to the maximum by an angle, referred to as the maximum pivoting angle. The light beam emitted by the lighting device exhibits an angle at the upper vertex greater than the maximum pivoting angle and wherein the at least one projection lens viewed in a frontal section has the form of a rectangle having a longitudinal side extending in a direction that is substantially parallel to the pivot axis of the micro-mirrors.

Abstract: An example assembly includes a top ring, a bottom ring, and a brace connected to the top and bottom rings. The brace spaces the top ring from the bottom ring, such as along a longitudinal axis of the assembly. The assembly further includes a sidewall extending from the top ring to the bottom ring and defining at least part of an interior space of the assembly. The assembly also includes at least one mirror disposed external to the interior space and opposite the sidewall. The mirror is moveable, and is configured to direct ambient light to the interior space via the sidewall.

Abstract: An enclosure for a portable computing device can include a cover glass affixed to an enclosure without trim pieces disposed between the cover glass and the disclosure. In one embodiment, the enclosure can include an edge profile that can define a relatively large contact pad about the enclosure. The contact pad can distribute impact forces over a relatively large area and thereby protect the cover glass integrity.

Abstract: An example optical device includes a first optical element and a second optical element. The first optical element has first and second surfaces. A first light emitted by a display is incident on the first surface. The first optical element includes transmissive portions and non-transmissive portions. Each of the transmissive portions extends in a first direction parallel to the first surface. The non-transmissive portions are respectively disposed in regions between the transmissive portions. A light transmittance of the non-transmissive portions is lower than that of the transmissive portions. A second light emitted from the second surface is incident on the second optical element, which emits a third light by condensing the second light. An optical axis of the third light is tilted with respect to an optical axis of the second light in a plane parallel to the first direction.

Abstract: A general purpose image and visual effects display apparatus, with associated methods, which is comprised of an array of independently angled reflective or refractive elements wherein the varying angle pattern of each element across said array is designed to reflect or refract specifically designed light and color sources as well as fortuitously located existing colors, in precisely determined patterns, to make apparent to designated viewing or receiving locations a wide range of complex visual effects.

Abstract: Multiple mirror panels are stowed for transport within an interior of a transport case and at a point of use are mounted on a support structure which is erected on the transport case to form a partial or complete full-length mirror at the point of use.

Abstract: A solar trough system of the invention comprises at least one trough-shaped reflector surface (1) directing beams coming from the sun to the focal axis (F); at least one thermal receiver (2) disposed at the focal axis (F) and extending along the reflector (1). Furthermore, the system comprises at least one first arm (L1) and a second arm (L2), one end of each of which are connected to two fixed points (P1, P2) with swivel joint; at least one third arm (L3) which is connected to the other ends of these two arms (L, L2) from two points (P3, P4) with swivel joint wherein the thermal receiver (2) is connected with swivel joint to a linear movement point (E1) on the third arm (L3) which moves with rotation of the first and second arms (L1, L2).

Abstract: Provided is a safety confirmation mirror whereby a blind spot near a corner of a passageway can be easily seen more clearly. The safety confirmation mirror includes, as a reflective surface (2), a portion of a Fresnel mirror (3) offset to one side of the widthwise center (C1). Accordingly, when the safety confirmation mirror is installed on a wall surface of a passageway at a T-shaped, L-shaped, or cross intersection, the reflective surface 2 reflects the blind spot of a passageway in one direction that a person is going to turn, and the person can see the conditions thereof. Moreover, the reflective surface 2 does not reflect the conditions in the unnecessary direction. Accordingly, the person looking at the safety confirmation mirror (1) is not confused by the unnecessary image and can easily see the blind spot near the corner of the passageway more clearly.

Abstract: A camera for a vehicle, in particular for monitoring the exterior environment. The camera having: an imager having a plurality of pixels, having different imager regions for different object distances, and an objective situated before the imager. Between the objective and the imager there is provided an additional optical unit that has in particular optical microelements, e.g., microlenses, the additional optical unit having different imaging properties for the imager regions of the imager, in particular for the compensation of different object distances and/or image distances.

Abstract: An optical device is disclosed including: a non-imaging secondary concentrator having an entry aperture and an exit aperture, and configured to receive light focused by a primary focusing element from a source onto the entry aperture. The non-imaging secondary concentrator includes: a first portion proximal the entry aperture; and a second portion proximal the exit aperture which is not rotationally symmetric about an optic axis. The optical device further comprises a means for homogenizing the light focused onto the entry aperture of the secondary concentrator.

Abstract: A color conversion substrate and liquid crystal display device of the present invention simplify the manufacturing process thereof and reduce deviations in intensity distribution of emitted light. The color conversion substrate includes a transparent substrate having a first main surface, a phosphor layer having a plurality of phosphors arranged along the first main surface and a plurality of transparent first boundary parts formed so as to surround the respective phosphors, and a plurality of first reflective parts formed on the outer peripheral surface of the respective plurality of first boundary parts. The portions of the first boundary parts where the respective first reflective parts are formed are curved, and the curvature thereof is 0.50/d1 to 0.83/d1, where d1 is the thickness of the respective first boundary parts.

Abstract: An apparatus (10) for deflecting and for widening a visible range of a camera (24) is provided, wherein the apparatus (10) has a first mirror element (12) which is tilted with respect to the optical axis of the camera (24) in a longitudinal direction in order to supply light to the camera (24) from a visible range lying laterally with respect to the optical axis. In this connection the first mirror element (12) is additionally tilted in a transverse direction perpendicular to the longitudinal direction and the apparatus has a second mirror element (14) besides the first mirror element (12) which is tilted in the longitudinal direction and in the transverse direction with respect to the first mirror element (12).

Abstract: Illumination optical unit for illuminating an object field in a projection exposure apparatus, comprising a first facet mirror with a structure, which has a spatial frequency of at least 0.2 mm?1 in at least one direction, and a second facet mirror, comprising a multiplicity of facets, wherein the facets are respectively provided with a mechanism for damping spatial frequencies of the structure of the first facet mirror.

Abstract: Structures for representing images comprise a plurality of tile elements which, when illuminated by a light source, each direct an amount of light toward an observer at a viewing location dependent on their orientation angles. The orientation angles of each tile element may be selected based on a characteristic of a corresponding pixel of an image, such that the observer sees a representation of that image created by the varying amount of light directed to the viewing location by the tile elements.

Abstract: System for manufacturing facets comprising a frame a series of mirrors and multiple securing parts in which said parts are the key to the invention and are formed by a rod and a circular metal sheet provided with a series of small circular perforations, where the rod and the circular sheet are attached by electric arc welding or any other equivalent fixation and the purpose of which is to secure a curved mirror to the rear structure or frame of a heliostat.

Abstract: A magnifying imaging optical unit has at least four mirrors to image an object field in an object plane into an image field in an image plane. An absolute value of the Petzval radius of the image field is greater than 500 mm. The imaging optical unit can be used to inspect with sufficient imaging quality relatively large mask sections of lithography masks used during projection exposure to produce large scale integrated semiconductor components.

Abstract: An imaging element array includes a plurality of imaging elements that are arranged side by side. Each imaging element is integrally molded and includes an incident surface, an emission surface, and a plurality of reflective surfaces which is provided between the incident surface and the emission surface. The imaging element includes a first reflective element. In the first reflective element, at least one of the plurality of reflective surfaces is formed on a top of a convex portion which protrudes outwardly and has reflective sidewalls extending therefrom. In the first reflective element, a width of the reflective surface, which is formed on the top of the convex portion, in an arrangement direction thereof is less than a distance from an entrance into the concave portion to the top of the convex surface.

Abstract: The sliding mirror system permits a 360° view of an object or subject to be viewed. The system includes a plurality of panels, at least one panel being movable relative to the other panels. The movable panel(s) is mounted on rails or the like for sliding movement. Each panel is configured as a portion of an arc. Multiple mirrors are mounted on the face of each panel. Each mirror may also assume an arc-shaped configuration.

Abstract: A light trapping optical cover employing an optically transparent layer with a plurality of light deflecting elements. The transparent layer is configured for an unimpeded light passage through its body and has a broad light input surface and an opposing broad light output surface. The light deflecting elements deflect light incident into the transparent layer at a sufficiently high bend angle with respect to a surface normal and direct the deflected light toward a light harvesting device adjacent to the light output surface. The deflected light is retained by means of at least TIR in the system formed by the optical cover and the light harvesting device which allows for longer light propagation paths through the photoabsorptive layer of the device and for an improved light absorption. The optical cover may further employ a focusing array of light collectors being pairwise associated with the respective light deflecting elements.

Abstract: A semiconductor laser driver includes a light detection circuit to detect a quantity of light as a detected light emission intensity and output the detected light emission intensity to the control circuit, and a control circuit to control a light emission intensity for the semiconductor laser based on the detected light emission intensity and on a predetermined light emission intensity setting value. The light detection circuit includes a photoelectric conversion element to convert the quantity of light emitted from the semiconductor laser into an electrical current and output the converted electrical current, a current magnification setting circuit to amplify the electrical current output from the photoelectric conversion element to a predetermined amplified current at one of multiple different predetermined magnifications, a detection resistor to convert the amplified current output from the current magnification setting circuit into a voltage and output the voltage as the detected light emission intensity.

Abstract: An illumination optical unit for projection lithography has a first polarization mirror device to reflect and polarize of illumination light. A second mirror device, which is disposed downstream of the polarization mirror device reflects an illumination light beam. At least one drive device is operatively connected to at least one of the two mirror devices. The two mirror devices are displaceable relative to one another via the drive device between a first relative position, which leads to a first beam geometry of the illumination light beam after reflection at the second mirror device, and a second relative position, which leads to a second beam geometry of the illumination light beam after reflection at the second mirror device, which is different from the first beam geometry. This results in a flexible predefinition of different illumination geometries, in particular of different illumination geometries with rotationally symmetrical illumination.

Abstract: An electronic device may be provided with a display mounted in a housing. The display may have an array of display pixels that provide light to a user. The array of display pixels may form active display structures with a rectangular shape. The rectangular active display structures may be surrounded by an inactive border region. Reflector structures may be used to reflect light that is emitted from peripheral portions of the active display structures to a portion of the display overlapping the inactive border region, thereby providing the display with an effective active area that is larger than the area of the active display structures. The reflector structures may include rotatable reflectors. Control circuitry may use a rotatable positioner to rotate rotatable reflector structures in synchronization with controlling which pixel data is displayed by the display pixels in the peripheral portions of the active display structures.

Abstract: An optical device is disclosed including: a non-imaging secondary concentrator having an entry aperture and an exit aperture, and configured to receive light focused by a primary focusing element from a source onto the entry aperture. The non-imaging secondary concentrator includes: a first portion proximal the entry aperture which is rotationally symmetric about an optic axis; and a second portion proximal the exit aperture which is not rotationally symmetric about the optic axis.

Abstract: A solar concentrator comprises a pair of concentric reflectors having a spindle toroid geometry for focusing the collected solar radiation into a ring-shaped focal area, as opposed to the “point” or “line” focus of prior art configurations. In a preferred embodiment, each reflector is formed of a plurality of curved petals that are disposed in a contiguous, keystone arrangement that requires no additional fixturing to hold the petals in place. Such an arrangement reduces the weight, complexity and cost of the final solar concentrator structure.

Abstract: A mirror ball adapted to engage the socket of a ceiling mounted electric light fixture in order to be suspended and powered therefrom. A tubular stem having a proximal portion threaded in the manner of an Edision screw is provided extending downward from the fixture to a lower base. A lightweight mirrored sphere or globe having a void through its (vertical) polar axis is rotatably engaged on the stem and retained in place by the lower base which houses power systems, a controller and a motor engaged to an annular gear at the lower pole of the mirrored sphere in order to slowly rotate the globe. A power supply is used to reduce line voltage to 12 v DC to drive the motor and operate one or more LED lighting elements directed at the mirrored surface and mounted at the ends of one or more arms radiating from the lower housing.

Abstract: Asymmetric sectioned mirrors are presented. The mirrors include, for example, constant radius of curvature sections that are selected to increase the sizes and improve the definitions of images, for example images of children milling, walking and/or standing about either the front or alongside regions of a school bus. The mirrors may be asymmetric in either or both the horizontal and vertical directions. The mirrors may include a mounting system capable of using both ball mounts and tunnel mounts.

Abstract: A fly's eye mirror including first and second complementary M×N arrays, each including a plurality of faceted reflective surfaces arranged along both the first and the second axes. When assembled, the two complementary arrays are integrated together and mounted onto a common base plate. With the increased lineal length of each array along both axes, the faceted reflective surfaces of each array are in rotational or tilt alignment with a base plate along both axes.

Abstract: The present invention relates to an optical component for a maskless exposure apparatus, and more particularly, to a micro-prism array or a micro-mirror array which is an optical component capable of screening diffused light such that the image of a pixel of a digital micro-mirror display (DMD) formed by a first image-forming lens in the maskless exposure apparatus has no influence on the image of a neighboring pixel and of totally reflecting the light after reflection or diffraction at the same time, thus improving exposure performance by using the quantity of light being transmitted without a loss and increasing numerical apertures (NAs) at the same time.

Abstract: A decorative film having a wood-like 3-dimensional appearance includes a plurality of Fresnel mirrors extending generally parallel to an in-plane axis, a diffuser disposed to scatter light reflected by the Fresnel mirrors, and wood-grain indicia disposed to cover the Fresnel mirrors. Embodiments of the film can be made to simulate highly figured wood such as flame maple, also called fiddleback maple. Other decorative articles that utilize Fresnel mirrors are also disclosed. At least some of these other articles do not have a wood-like appearance, and they may include a Fresnel mirror film in combination with other components such as a Fresnel lens film or other light-transmissive film(s).

Abstract: A Micromirror Array Lens with self-tilted micromirrors comprising a plurality of self-tilted micromirrors and configured to form a designed optical surface profile by self-tilted micromirrors. Each self-tilted micromirror comprises a substrate, at least one stiction plate configured to be attracted to the substrate by adhesion force, a micromirror plate having a reflective surface, coupled to the stiction plate elastically and configured to have a required motion when the stiction plate is attracted to the substrate, and at least one pivot structure disposed between the substrate and the micromirror plate and configured to provide a tilting point or area for the motion of the micromirror plate. The designed optical surface profile determines the required motion of the micromirror plate and a surface profile shape memory is built in the structure of the micro-mechanical elements of the self-tilted micromirrors so that each micromirror plate has the required motion.

Abstract: Embodiments described herein generally relate to apparatus for heating substrates. The apparatus generally include a process chamber having a substrate support therein. A plurality of lamps is positioned to provide radiant energy through an optically transparent dome to a substrate positioned on the substrate support. A light focusing assembly is positioned within the chamber to influence heating and temperature distribution on the substrate and to facilitate formation of a film on a substrate having uniform properties, such as density. The light focusing assembly can include one or more reflectors, light pipes, or refractive lenses.

Abstract: A planar collimator has first and second sections each intersecting at a junction between a first axis and a second axis normal to the first axis. Each of the first and second sections have geometries configured to receive light from a source point located on the first axis and collimate the light at respective positive and negative tilting angles relative to the second axis. The first and second sections direct the collimated light to respective first and second sides of a focusing mirror and away from a gap between the first and second sides of the focusing mirror.

Abstract: Provided is a safety confirmation mirror whereby a blind spot near a corner of a passageway can be easily seen more clearly. The safety confirmation mirror includes, as a reflective surface (2), a portion of a Fresnel mirror (3) offset to one side of the widthwise center (C1). Accordingly, when the safety confirmation mirror is installed on a wall surface of a passageway at a T-shaped, L-shaped, or cross intersection, the reflective surface 2 reflects the blind spot of a passageway in one direction that a person is going to turn, and the person can see the conditions thereof. Moreover, the reflective surface 2 does not reflect the conditions in the unnecessary direction. Accordingly, the person looking at the safety confirmation mirror (1) is not confused by the unnecessary image and can easily see the blind spot near the corner of the passageway more clearly.

Abstract: An apparatus for concentrating solar radiation includes a number of modules. Each module has three receivers for receiving reflected radiation and a reflecting surface. The receivers form a triangle in a plane approximately parallel to the reflecting surface. The reflecting surface has a number of reflectors. Each of the reflectors includes three mirrored facets which are each oriented such that light reflected from the facet is directed to one of the three receivers. Further, each of the reflectors is positioned with respect to the receivers and the other reflectors to reduce facet shading.