Abstract: An object of the present invention is to provide an infrared lens unit having a high optical quality and an infrared camera system provided with the infrared lens unit. An infrared lens unit according to the present invention to achieve the object is the infrared lens unit to be attached to an infrared camera-module characterized in comprising a data memory for storing lens data and an image focusing condition is controlled according to the data stored in the data memory and temperature data in the infrared lens unit.

Abstract: A retroreflective sheet structure (10) comprising a transparent layer (20) having a front light-receiving surface (30) and a rear retroreflecting surface (32). Light incident on the front surface (30) will pass through the layer (20), impinge on the rear retroreflective surface (32) and reflect back out through the front surface (30) in a predetermined direction. An identifying indicia (44) is chosen and then formed on the retroreflecting surface (32). This indicia (44) can be used for identification purposes, even years after an end product incorporating the reflective sheet structure (10) has been out in the field.

Abstract: A projection device includes an optical element including a hologram recording medium where information is multiplexedly recorded in each position so as to allow a coherent light beam to be diffused to a plurality of regions, an irradiation device configured to irradiate the optical element with the coherent light beam so as to allow the coherent light beam to scan the hologram recording medium, spatial light modulators configured to be illuminated with the coherent light beam which is incident from the irradiation device to the hologram recording medium to be diffused to the plurality of regions, and projection optical systems, each projection optical system projecting modulation image obtained on each spatial light modulator on corresponding screen. The coherent light beam, which is incident to each position of the hologram recording medium to be diffused, is illuminated on a plurality of the spatial light modulators.

Abstract: A light tunnel for use in an optical projection system, comprising: a plurality of reflecting plates, each said reflecting plate being disposed between and connected to the other two said reflecting plates, so that a light passage with a hollow structure is defined by said plurality of reflecting plates. At least one of said reflecting plates has a first surface in an inclined structure, said reflecting plate having said first surface is disposed between and obliquely connected to the other two said reflecting plates for forming said light passage having a non-rectangular cross section, and said first surface of said reflecting plate is abutted against an adjoined reflecting plate to form a junction with no gap between said first surface of said reflecting plate and said adjoined reflecting plate.

Abstract: A method and apparatus for resonant rotational oscillator have been disclosed. In one version a moving coil is mounted on a rotating member. By using a magnetic assembly and the moving coil the rotating member is made to rotate.

Abstract: Provided is a light source device having optical fiber arrays arranged so that different sets of RGB laser lights are focused at different depth positions, while enhancing the efficiency of light utilization. The light source device includes a plurality of optical devices each of which generate red, green, or blue laser light, a plurality of first, second, and third optical fibers through each of which the red, green, or blue laser light from a corresponding one of the plurality of optical devices is guided, and a fiber bundle combiner which forms a fiber bundle by fixedly holding together end portions of the plurality of first, second, and third optical fibers in such a manner that a plurality of optical fiber sets, each comprising three optical fibers one from the first optical fibers, one from the second optical fibers, and one from the third optical fibers, are stacked in layers.

Abstract: Imaging systems in which an undedicated optical component—i.e., a component that would be present in the system even in the absence of image stabilization—is configured to undergo corrective motion and/or other correction of image data, and thus to function as a stabilization component. The stabilization component may be a mirror and/or a lens, and a positioner may be provided to tilt, rotate, and/or otherwise precisely adjust the position and orientation of the stabilization component to improve image resolution, compensate for platform motions such as platform vibration, and/or improve image tracking. Because an undedicated optical component functions as the stabilization component, the stabilization occurs upstream, rather than downstream, from separation (if any) of the incoming image data into two or more beams.

Abstract: A holographic display device and method of generating a hologram using redundancy of 3D video are disclosed. A storage unit stores the hologram of a previous 3D image frame. A control unit generates an update map indicating an update required 3D point among 3D points included in a current 3D image frame based on the current 3D image frame and the previous 3D image frame and modifies the update map to further include information indicating the update of a 3D point related to the update required.

Abstract: A method and system for displaying information on an electronic paper (or “e-paper”) is included herein. The method includes passing the e-paper through an e-paper printer. Additionally, the method includes changing a status of a pixel on the e-paper.

Abstract: The invention concerns a scanning device for focusing a beam of rays in defined regions of a defined volume, comprising an input optics wherein the beam of rays penetrates first, having at least one first optical element; a focusing optics for focusing the beam of rays exiting from the input optics; and a deflecting device arranged between the first optical element and the focusing optics, for deflecting the beam of rays after it has passed through the first optical element, based on a position of the focus to be adjusted in lateral direction. In order to adjust the position of the focus of the beam of rays in the direction of the beam of rays, and optical element of the input optics can be displaced relative to the deflecting device.

Abstract: A vehicle folding rear view mirror support mechanism having first (15) and second (16) pivotally interconnected support arm means. A first end (15b1) of the first support arm means is pivoted on a mounting bracket (18) for attachment to the vehicle, a second end (15c1) of the first support arm means is pivotally connected with a first end (16b1) of the second support arm means, and a mirror mount (22) is pivotally connected to a second end (16c1) of the second support arm means. The first and second arm means (15, 16) are movable between a retracted reduced width position in which the two arm means are in a side by side substantially parallel relationship and an extended increased width position in which the two arm means are substantially end to end and the mirror mount (22) is supported at its maximum distance from the mounting bracket (18).

Abstract: Techniques and architecture are disclosed for implementing an optical dome bezel to interface an optical dome/window and a housing of differing coefficients of thermal expansion (CTEs), In some embodiments, the bezel may comprise a material (e.g., Ti-6Al-4V) that is CTE-matched to the optical dome material (e.g., silicon, germanium, sapphire, ALON), thereby mitigating temperature effects on system performance. In some embodiments, the bezel may include a radially compliant flexure feature (e.g., flexure blades, spring-form S-channels), which mitigates physical stress effects (e.g., vibration, thermal expansion/contraction, etc.) on system performance. In some embodiments, the bezel may include an integral environmental sealing feature (e.g., O-ring gaskets), which protects internal optics/electronics from external environmental hazards (e.g., moisture, corrosive substances, particulates, debris).

Abstract: An off-axial three-mirror system includes a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. The secondary mirror is located on a reflective optical path of the primary mirror. The tertiary mirror is located on a reflective optical path of the secondary mirror. The image sensor is located on a reflecting optical path of the tertiary mirror. The primary mirror and the tertiary mirror are formed as one piece. The surface type of both the primary mirror and the tertiary mirror is a freeform surface.

Abstract: An optically bistable element is described. The optically bistable element has an arrangement of nano-particles configured to propagate localized plasmon-polaritons (LLPs). The optically bistable element may act as switch. A computing structure is also described, where the computing structure comprises one or more of the optically bistable elements acting as switches.

Abstract: An exposed lens retroreflective article that includes a binder layer; a layer of spaced apart optical elements that are partially embedded in the binder layer; a penetrated colored layer that is located between the spaced apart optical elements; and a reflective layer that is located functionally behind the layer of optical elements and the penetrated colored layer.

Abstract: Systems, methods, and computer-readable media for thermally managing electronic devices using dynamic optical components are provided. At least one of the reflectance and the transmittance of incident electromagnetic radiation of a dynamic optical component on an electronic device may be adjusted based on a detected variable device characteristic of the device, such as a temperature of a device component. By adjusting the reflectance and/or the transmittance of the dynamic optical component, different portions of the incident electromagnetic radiation may be directed from the dynamic optical component for changing the variable device characteristic.

Abstract: A holographic three-dimensional (3D) printing apparatus and a method of driving the same are provided. The holographic 3D printing apparatus includes a light source configured to emit a beam, a beam splitting and expanding unit configured to split the emitted beam into a reference beam and a signal beam and expand the signal beam, an illumination unit configured to extract the expanded signal beam and collimate the extracted signal beam, a spatial light modulator (SLM) configured to modulate the collimated signal beam, an objective lens unit configured to emit the modulated signal beam to a holographic recording medium, and a reference beam forming unit configured to emit the reference beam to the holographic recording medium.

Abstract: A solar concentrator is composed of the cascading of the first light guiding module and a second light guiding module. The solar light is collected and guided simultaneously toward the light propagation destination by the light guiding modules. By cascading the light guiding modules in the direction of guiding, the solar concentrator has thinner thickness than the traditional concentrator and has a zero back focal distance to reduce the assembly cost. The solar concentrator utilizes the optical design concept of coincident image points from both the relay and converging optics such that the optical flux is increased in the cascading light guiding modules while the light propagation direction within the concentrator is maintained.

Abstract: Disclosed are a light reflective material which shows the color and texture of a base material thereof in the daytime and acts as a light reflector at night, and a preparation method thereof. According to embodiments of the present invention, the preparation method includes preparing an extrusion base material such as plastic or synthetic wood, and supplying a light reflecting element such as glass beads on the surface of the extrusion base material and passing the extrusion base material through an extruder to form a light-reflective layer on the surface of the extrusion base material.

Abstract: An optical filter includes a first substrate, a first mirror formed on the first substrate, a second substrate coupled to the first substrate, the second substrate including a concave portion, a second mirror formed on the concave portion and facing the first mirror, and an electrode formed on the second substrate and around the second mirror. The first substrate includes a plurality of first hinge portions and a plurality of second hinge portions inside the plurality of first hinge portions.