3206 results about "Plane mirror" patented technology

A multicolor optical image-generating device comprised of an array of grating light valves (GLVs) organized to form light-modulating pixel units for spatially modulating incident rays of light. The pixel units are comprised of three subpixel components each including a plurality of elongated, equally spaced apart reflective grating elements arranged parallel to each other with their light-reflective surfaces also parallel to each other. Each subpixel component includes means for supporting the grating elements in relation to one another, and means for moving alternate elements relative to the other elements and between a first configuration wherein the component acts to reflect incident rays of light as a plane mirror, and a second configuration wherein the component diffracts the incident rays of light as they are reflected from the grating elements. The three subpixel components of each pixel unit are designed such that when red, green and blue light sources are trained on the array, colored light diffracted by particular subpixel components operating in the second configuration will be directed through a viewing aperture, and light simply reflected from particular subpixel components operating in the first configuration will not be directed through the viewing aperture.

Apparatus for automatically inspecting a stream of matter comprises lamps which emit a detection medium, such as IR or visible light, to be active at the matter, a rotary polygonal mirror which receives from a multiplicity of detection zones at the matter detection medium which has been varied by variations in the matter, an optical detection device which receives the varied medium by reflection from the mirror, to detect a plurality of wavelengths of the varied medium substantially simultaneously, and to generate detection data in respect of that plurality of wavelengths substantially simultaneously and in dependence upon the variations in the medium, and a microprocessor which obtains the detection data from the device. The beams of the varied medium which are received at the device and emanate from the zones travel along respective paths from the matter to the mirror 9 which paths converge continuously with respect to each other from the matter to the mirror. Those paths may extend to the mirror indirectly by way of at least one planar mirror, or directly to the mirror, in which latter case the axis of the mirror would be substantially parallel to the direction of advance of the matter.

A mirror that, when used as a side view mirror, greatly increases the driver's field of view and eliminates the blind spot that is inherent in traditional side view mirrors. The mirror comprises two halves, the first half consisting of a plane mirror and the second half being a mirror with a convex shape. The plane mirror can be used to view other vehicles at a distance. The half with the convex shape is used to view vehicles that are close to the driver's vehicle. The increased field of view, and elimination of the blind spot, makes lane changes safer for the driver and other vehicles on the road.

The display apparatus of the present invention is a display apparatus for a head-up display, and is provided with a liquid crystal display which has a single display region including a first display region and a second display region, a half mirror which reflects first exit light exiting from the first display region of the liquid crystal display, and a plane mirror which reflects second exit light exiting from the second display region of the liquid crystal display toward the half mirror. The first exit light which has been reflected by the half mirror and the second exit light which has penetrated the half mirror are led out of the apparatus in an overlapping state.

A photovoltaic device operable to convert light to electricity, comprising a substrate, a plurality of structures essentially perpendicular to the substrate, one or more recesses between the structures, each recess having a planar mirror on a bottom wall thereof. The structures have p-n or p-i-n junctions for converting light into electricity. The planar mirrors function as an electrode and can reflect light incident thereon back to the structures to be converted into electricity.

A laser consolidation apparatus for manufacturing precise three dimensional structures disclosed. The apparatus comprises means for feeding a stream of material to an area on a surface to be built up, at an angle normal to the surface and means to direct a converging laser beam on the surface at an angle of 25 to 30° to the normal to the surface from a plurality of directions surrounding the material feed. Discrete mirror segments direct the laser beam on to movable plane mirrors producing reflected beams which combine to illuminate an area on the work surface.

The invention discloses a star sensor calibrator and a method for calibrating a high-precision star sensor. The star sensor calibrator has the structure that a two-dimensional adjustable plane mirror is arranged on the optical path between a single-star simulator and a star sensor to be calibrated; the position forming an included angle of 90+/-15 degrees with the two-dimensional adjustable plane mirror is provided with a laser device of a laser angle measuring device; the position 50-200 cm away from the center of the two-dimensional adjustable plane mirror is provided with a high-precision two-dimensional guide rail which can vertically and horizontally move on an optical hover platform; a laser detector of the laser angle measuring device is installed on the high-precision two-dimensional guide rail; after being reflected by the two-dimensional adjustable plane mirror, the laser emitted by the laser device is incident into the laser detector; and a data processing computer is respectively communicated with the star sensor to be calibrated and the laser detector. The invention does not need to rotate the star sensor, increases the tangential distortion and the deflection angle of the installation error, and can meet the requirements for very-high-precision (sub-arcsec) star sensors. The invention has the advantages of simple method and small amount of calculation.

The invention relates to a high-precision laser photocuring 3D (three dimensional) printer. The high-precision laser photocuring 3D printer comprises a shell and a pedestal. The high-precision laser photocuring 3D printer has the beneficial effects that one end of a high-precision ball screw is connected with a servo motor, the control precision of the servo motor is guaranteed by a rotary encoder at the rear end of a motor shaft and is accurate, and the high-precision laser photocuring 3D printer utilizes the servo motor, so that the printer is stable, and the energy consumption is reduced; as the ball screw has the characteristics of high positioning precision, small friction force, high rigidity and strong load capacity, the molding precision of the printer is high; a circuit control module is connected with a touch screen and a power supply switch respectively through data wires to intelligently control the printer, so that the control precision and processing efficiency are increased; a digital projection device comprises a digital projector horizontally fixed on the upper side of the pedestal, and a plane mirror, so that the structure of the printer is compact; the digital projection device comprises an ultraviolet source and a focusing lens, and the focusing lens is arranged above the ultraviolet source, so that the realizing theory is simple, and the cost performance is high.

The invention relates to a device and a method for measuring lens focal length as well as a method for evaluating optical quality, wherein the device for measuring the lens focal length is composed of a plane mirror, a lens to be measured, a point light source, a vertical incision, a one-dimensional precise flat movable guide rail, a laser distance measuring instrument, a CCD detector and a display, and the method for measuring the lens focal length is as follows: (1) adjusting the autocollimation of the point light source and the lens to be measured; (2) adjusting the plane mirror to make the transflective convergent beam enter the CCD detector; (3) measuring the focal depth of the lens to be measured; (4) measuring the distance L from the point light source to the geometric main plane of the lens to be measured; (5) calculating the focal length f = L + d of the lens to be measured, and the d is the distance between the geometric main plane of the lens and the optical main plane. The optical processing quality of the lens to be measured is qualitatively evaluated through the observation of shape of the far-field focal spot. The device and the method are applied to the measurement and evaluation of the small-bore short-focus and large-bore long-focus lens, and have the advantages of the intuitionism, the high measuring precision and the simple mechanism.

The invention discloses a method and a device for measuring surface topographies of mirror and mirror-like objects. Phase measurement deflectometry is adopted to measure mirror and mirror-like surface shapes, a combination between a liquid crystal display and a planar mirror serves as a calibration plate, the liquid crystal display is fixed and can not move, the planar mirror moves freely for four times, an image reflected by the planar mirror is photographed by a CCD detector, linear solution and beam method adjustment are then used for completing calibration on inner parameters of the camera, global pose estimation is used for completing calibration on the relative relation between the liquid crystal display and the camera, and finally, a three-dimensional topography of a to-be-detected mirror surface is calculated and obtained through a gradient integral of the phase measurement deflectometry. According to the device and the method of the invention, defects that the calibration plate is needed and a precise positioning control point is attached to the planer mirror during the calibration process in the traditional method are overcome, the measurement cost is low, and he measurement speed is quick; and constraint conditions such as rotation matrix orthogonality during a perspective imaging process and a fourier transform method are introduced for corresponding point matching, and influences by high noise and multiframe processing on three-dimensional topography recovery can be overcome.

The invention relates to a plane mirror being capable of projecting sunlight directionally which is the usually-called Tingri mirror and belongs to the solar energy application technical field. In the device, positioning plus elevation tracking or auto-rotating plus elevation tracking is adopted; the device comprises a plane mirror, a frame with a dimension small enough to be formed at one time, an adjusting device, a positioning and guiding pipe arranged a center tower and the Tingri mirror, a positioning sensor and a control system which carries out control and error judgment according to signals produced by reflection light reaching a mirror surface of a four-quadrant photosensitive element through the positioning and guiding pipe. If the invention is adopted, as long as sunlight, no matter where the sun move, the reflection light of the Tingri mirror can always project into a collector. Due to the adoption of the positioning and guiding pipe, the positioning sensor and DCS (distributed control system), a mirror with a small area can be used, reducing the difficulty in production, installation and commissioning and thus reducing the cost significantly.

The invention discloses a rotary Fourier transform interference imaging spectrometer, which includes a front collimation objective, a cube corner reflector, a beamsplitter, a rear imaging objective, a detector and a control and processing module, aims to reduce the light energy loss of a target, and has the characteristics of high luminous flux and detection sensitivity. The traditional rectilinear motion scanning manner of a moving mirror is substituted by the rotary scanning manner of the beamsplitter or the cube corner reflector, so as to avoid series of technical difficulties brought by precise rectilinear scanning of the moving mirror; a lateral shear interferometer based on the Michelson interference principle is adopted, and the characteristic of common path is obtained, so that the interference effect cannot be influenced even if the beamsplitter slightly shakes during the rotation; a planemirror in the traditional Fourier transform imaging spectrometer is substituted by the cube corner reflector, so that the problem brought by the inclined planemirror is avoided; therefore, the stability, reliability and vibration and impact resistance of the instrument are improved, and the structure of the spectrometer is more compact.

The laser scan tracker with six-freedom measurement function comprises double-frequency laser interferometer, two-D position sensitive detection device, spectroscope, two-D rotation plane mirror and coordinate bearing measuring target. Its coordinate bearing measuring target comdprises main shaft, axial plane rotating mechsniam in upper end of the main shaft and equipped with corner cube, main shaft circumagitating mechanism positioned in middle portion of main shaft and equipped with photoelectric measuring head or hollow tetrahedron measuring head and positioing mechanism which is positioned in lower end of main shaft and is composed of measuring bar and contact ball. The outer end of rotation arm is equipped with corner cube, said rotation is controlled by positioing plate.

The invention provides a laser processing device and a method of the laser processing device. The laser processing device comprises a laser, a lens set, a Dove prism, a plane mirror, a focus lens and a workpiece to be processed which are all sequentially arranged in the direction of an optical axis, wherein the lens set is composed of two lenses, and the distance between the two lenses can be adjusted so that the spot sizes and the divergence angles of outgoing beams of the laser can be adjusted; the Dove lens is installed in a rotary motor and rotates with the optical axis as the center, and the beams going out from the Dove lens also rotate with the optical axis as the center; the plane mirror is used for deflecting the transmission direction of the beams; the position of the focus lens in the beam transmission direction can be adjusted, and the beams are focused on the surface of the workpiece to be processed after passing through the focus lens; the workpiece to be processed is placed on an electric displacement platform and can make two-dimensional movement in the plane perpendicular to the transmission direction of the beams.

The invention provides a sweeping robot and a walking control method for the same. The method comprises the following steps of: mounting a plane mirror on a wall of a room to be swept, wherein a vertical non-reflective surface is arranged in the center of the plane mirror; the normal direction of the non-reflective surface is the positive direction of an X axis; a horizontal direction parallel to the plane mirror is the direction of a Y axis; and the central point of the vertical non-reflective surface is the original point of the X axis and the Y axis; calibrating the walking direction of the sweeping robot and the position of the original point according to the change of reflected laser which is transmitted to the plane mirror by a laser transmitter and received by a photoelectric conversion receiving head; calculating the walking distance of the sweeping robot in the X and Y directions by using a control module of the sweeping robot and positioning the sweeping robot on an indoor ground; and according to the positioning in a walking process, recording swept areas and identifying un-swept areas to finish the full sweeping of the indoor ground. The sweeping robot and the walking control method can realize a high-efficiency cleaning task and have a low cost.

The invention relates to a device for detecting the wave front of a large-aperture optical system. The device comprises an interferometer, a five-dimensional adjustment platform, a numerical-control turntable, a numerical-control electric displacement platform, a self-collimation standard plane mirror, a two-dimensional adjustment rack and a computer control and data processing system. The device is characterized in that: the wave front of the large-aperture optical system is divided into a plurality of sub-aperture wave fronts, the interferometer and the self-collimation standard plane mirror detect the sub-aperture wave fronts of the large-aperture optical system, the numerical-control turntable and the numerical-control electric displacement platform control the standard plane mirror to move so as to scan the sub-aperture wave fronts, the interferometer detects and records the sub-aperture wave fronts, so that the detected sub-aperture wave fronts cover the whole large-aperture optical system; and the computer control and data processing system stitches the sub-aperture wave fronts through algorithms, so that the full-aperture wave front of the large-aperture optical system is obtained, and the detection on the wave front of the large-aperture optical system is finished. The device has the advantages of simple structure, low cost and capability of detecting the image quality of the wave front of a large-aperture optical system with the aperture of not less than 1000 mm.

The invention discloses mid-infrared spectroscopy-based trace gas detection method and device combining a long-optical-path open light path with a wavelength modulation technique. The detection device mainly consists of a continuous wave quantum cascade laser (CW-QCL), a laser driving and controlling unit, a plane mirror, a beam splitter, a visible laser, a reference gas pool, mercury, tellurium and cadmium (MCT) detector, an off-axis parabolic mirror, a corner reflector, a digital lock-in-amplifier and a computer. By using the CW-QCL as a light source, long-optical-path open light path is combined with the wavelength modulation technique to detect multi-component trace gas with high sensitivity.

The invention discloses a systematic geometric demarcation method for reflection three-dimensional measurement of a stripe, and relates to systematic geometric demarcation during the three-dimensional appearance measurement of an object with a mirror reflection characteristic. As a stripe display device appears in a viewing field range of a video camera indirectly, the conventional systematic geometric demarcation process is fulfilled by adopting a method of sticking a marking point on a plane mirror. However, the physical coordinates of the marking point are required to be pre-measured through other precision measurement means. To solve the problem, the systematic geometric demarcation method adopts the scheme that the operation of sticking the marking point on the plane mirror is eliminated, the stripe on the stripe display device is reflected three times by the plane mirror, and analysis and linear calculation are conducted on the coordinates of the characteristic point and the imaging point of the stripe, so that the original value evaluation of the systematic geometric demarcation process is fulfilled; and then the evaluation result is optimized by adopting bundle adjustment, so as to obtain the final systematic geometric demarcation result. The systematic geometric demarcation method has the advantages of simplicity and flexibility; and only a plane mirror with a proper size is required for fulfilling the systematic geometric demarcation of the reflection three-dimensional measurement of the stripe. The systematic geometric demarcation method provides an efficient systematic demarcation way for phase position measurement deflection methods, stripe reflection photogrammetric survey and like which are based on stripe reflection three-dimensional measuring methods, thereby having a wide application prospect.

The invention relates to a two-dimensional high load-bearing large-caliber rapid control reflector. An outside surface of a rotating body and an inside surface of a supporting reflector frame of the reflector are both one part of a sphere surface. The two components are assembled in a mode that the spheres share the same spherical center and are in rigid connection with each other by a ball to form a rotary assembly similar to a bearing. The rotating body can universally rotate in the supporting reflector frame. Therefore, under the driving of a linear voice coil motor, the invention can realize high-frequency rapid two-dimensional rotation of the rotating body in the reflector frame and guarantees working stability and reliability of the rapid control reflector. On the other hand, the loads of rotating parts including a plane mirror is rigidly supported by the supporting reflector frame through the ball, which greatly improves bearing capacity and environmental suitability of the rapid control reflector.

Method and apparatus are presented for manufacturing transparent mirrored spheroidal mini-balls for solar energy and related applications such as optical switches. For these applications it is imperative to provide accurate specular reflection from the mirror. Various means are described for maintaining the desired mirror flatness and avoiding warping, buckling, etc. of the mirror surface during manufacture. The mini-balls are in the size range of 4 microns (4×10⁻⁶ m) to 10 centimeters (10⁻¹ m), and are transparent in at least one hemisphere. They preferably have a reflecting mid-plane mirror, though they can also be mirrored on a flat top of the ball.

The invention discloses a single-pixel terahertz holographic imaging device and method. Monochromatic terahertz light emitted by a terahertz laser source is transformed into parallel light with larger beamwidth by a beam expander device, and then divided into object light and reference light through a beam splitter; the object light is encoded by a modulation device in airspace after irradiating an object; the reference light passes through an adjustable phase shifter on the light path after being reflected by a plane mirror; the object light is converged with the reference light on a second beam splitter after being reflected by the plane mirror, enters a single-pixel detector at the focus point of a condenser lens after being converged by the condenser lens; a signal output by the single-pixel detector is fed to a control module to carry out image reconstruction; and terahertz holographic compression sensing imaging of the object is achieved by changing combination of a space code on the modulation device and a phase on the adjustable phase shifter for a plurality of times. The single-pixel terahertz holographic imaging device and method have the advantages that real three-dimensional imaging of the tested object is achieved by combining phase-shifting digital holography with a compression sensing principle, and the single-pixel terahertz holographic imaging device and method are pioneering inventions in the field of terahertz imaging.

A non-scanning 3D imaging laser radar optical system based on an APD array is arranged in a shell of a laser radar system. The non-scanning 3D imaging laser radar optical system is composed of a laser, a Galilean telescope, an optical splitter, an emitting optical unit consisting of an emitting-receiving spectroscope and an emitting lens with the focal length of f1 and a receiving optical unit consisting of a receiving lens with the focal length of f2 and the emitting-receiving spectroscope; the inner wall of the tail part of the shell of the laser radar system is provided with the laser, the Galilean telescope is arranged in front of the laser, the optical splitter is arranged in front of the Galilean telescope, the emitting-receiving spectroscope is arranged in front of the optical splitter, is a plane mirror with a hole provided at the center thereof, is positioned between a light spot and the receiving lens with the focal length of f1 and placed at 45 degrees to an optical axis, a port on the shell of the laser radar system is provided with the receiving lens with the focal length of f2, the emitting lens is positioned in the hole at the center of the receiving lens, and the emitting-receiving spectroscope reflects beams at 90 degrees to a detector at a focal plane position of the receiving lens. The optical system has simple structure and high accuracy, and can be applicable to the fields of plotting, navigation and astronautics.

An improved lithographic interferometer system, is presented herein. The lithographic interferometer system comprises a beam generating mechanism, mirrors which reflect those beams, and detection devices for detecting an interference pattern of overlapping reflected beams. The beam generating mechanism comprises a beam-splitter, which splits the beams into reference beams and measuring beams, a reference mirror that provides a plane mirror interferometer, and a reflective surface that emits at least one reference beam used in a differential plane mirror interferometer.