324 results about "Optical flat" patented technology

A two piece lens mount system for mounting a lens in correct focus and alignment relative to a CMOS imaging device such that the optical axis of the lens is coincident with and perpendicular to the center of the active area of the imager array. The lens is secured by the axial pressure of flexible ribs that are symmetrically spaced around the internal bore of a lens holder and act on a smooth surface on the outside of the lens. This arrangement eliminates translation of the lens across the imager array. Another portion of the body of the lens is threaded such that the lens, when rotated about its optical axis may be focused or axially aligned. When a focus or axial alignment point is reached, a staking fluid may be added to the lens thread, through a hole in the lens holder to prevent de-focusing. The second component of the lens mount system, the lens mount base, is fixedly secured to an imager board on which is mounted a CMOS imager. The upper wall of the lens mount base is in close, parallel proximity to the optical flat of the imager and has a rectangular opening which restricts light from the lens to the active area of the imager, and more specifically prevents light from falling on the column amplifiers of the imaging device. The design of both components is such that they may be moved relative to each other with external fixturing, in front of a known target, until it is decided that the lens is directly over the center of the imager array. The lens holder and the lens mount base are then fixed together permanently using a laser weld process or any other plastic bonding technique.

A circuit for implementing a registration-free, contiguous conductive plane. A circuit may include a plurality of conductive structures in a first plane. The circuit may further include a contiguous conductive equipotential surface in a second plane parallel to the first plane. The circuit may further include activation means configured to adjust an electric field between the first and second planes thereby activating one or more structures in the first plana by increasing a potential difference between the first and second planes to a threshold level deemed to constitute an active state. The circuit may further include deactivation means configured to adjust the electric field between the first and second planes thereby deactivating one or more structures in the first plane by decreasing the potential difference between the first and second planes below a threshold level deemed to constitute a deactivation state.

The invention relates to a borderless display device and a large screen displayer, wherein the borderless display device comprises a display screen and an optical element covering the display screen; the optical element comprises an optical flat and a light guide component arranged at periphery of the optical flat; the light guide component comprises a plurality of superposed light guide films which are arranged in a direction of being far away from the optical flat from a side of the optical flat; the light guide films are superposed in expanding form, and air gaps are formed among the light guide films; the light emitted from an edge display region of the display screen enters into the bottom surface of the light guide component and is output from a top surface of the light guide component after being guided by the light guide films of the light guide component, so as to form a light-emitting surface which is bigger than the bottom surface of the light guide component and is used for covering the border; and the large screen displayer is spliced by a plurality of borderless display devices. The borderless display device provided by the invention has the advantages of simple structure, excellent display effect and the like.

A combined interference device for measurement of aspheric surface includes a laser, a spatial filter, two beam expanding systems, a beam shrinking system, a spectroscope, a convertible lens, three polarizers, two optical plates, four circular optical wedges with small wedge angle, a beam-dividing grating, a 1/4 wave plate, a polarizer group and a CCD. In the device, real-time measurement is realized through simultaneous phase-shifting method, and frequency conversion function is realized through rotating two pairs of double optical wedges. The experimental device adopts common optical elements, so the cost is low, and the device can measure aspheric surfaces of different diameters and is suitable for the plane and the sphere. The real-time high precision measurement in conventional environment can be realized, and the invention has frequency conversion function, which is very effective for treating the mirror surface with discontinuous regions.

The invention relates to a time-resolved spectrum measurement instrument, in particular to a modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer. The modularized femtosecond time-resolved transient absorption and fluorescence depletion two-in-one spectrometer comprises an instrument optical flat, a pumping light path system and a probing light path system consisting of a plane mirror, a convex lens, a light diaphragm, a light filter, a time delay line, nonlinear optical crystals and a sample system, and also comprises a spectrum detection system. Since the spectrometer uses the optical flat as a bottom plate and various optical components, the modularization of the instrument is realized and the instrument can be moved on the whole; since a femtosecond time-resolved transient absorption spectrometer and a femtosecond time-resolved fluorescence depletion spectrometer are integrated into one, working personnel can conveniently conduct adjustment and the spectrometer can be widely popularized and used.

An improved apparatus (20) and method are provided for effective, high speed contact planarization of coated curable substrates such as microelectronic devices to achieve very high degrees of planarization. The apparatus (20) includes a planarizing unit (28) preferably having an optical flat flexible sheet (88) and a backup optical flat body (82), and a curing assembly (30). In operation, a substrate (78) having a planarizable coating (76) is placed within a vacuum chamber (26) beneath sheet (88) and body (82). A pressure differential is created across sheet (88) so as to deflect the sheet into contact with a central region C of the coating (76), whereupon the coating (76) is brought into full planarizing contact with sheet (88) and body (82) by means of a support (114) and vacuum chuck (120); at this point the coating (76) is cured using assembly (30). After curing, a pressure differential is established across sheet (88) for sequentially separating the sheet from the peripheral portion P of the coating, and then full separation of the sheet (88) and coating (76).

The system comprises: a X-Y precise stepping platform used for placing the optical component under test; using two laser beams to illuminate the surface of the optical component from both vertical and inclined directions; the generated scattered lights are collected by multi photoelectric detectors from different azimuth angles; converting the collected scattered lights into the electrical signals which are inputted into the computer; the computer controls the X-Y precise stepping platform to drive the optical component under test; making scan measurement, and comparing the scattered light signals with the scattered light signals used for showing the faults on the optical flat surface in order to realizing the location, classification and level of the faults on the optical flat surface.

The invention discloses a surface incidence graphene photoelectric detector based on one-dimensional optical grating. The surface incidence graphene photoelectric detector based on the one-dimensional optical grating comprises a silicon-on-insulator (SOI) substrate, the one-dimensional optical grating, a graphene layer (8), a first interdigital electrode (4) and a second interdigital electrode (5), wherein the SOI substrate sequentially includes silicon, a buried oxide layer and top layer silicon from bottom to top; the top layer silicon is etched to form the one-dimensional optical grating, and the one-dimensional optical grating is formed by alternate distribution of a plurality of silicon dioxide strips (6) and a plurality of silicon strips (7) and used for modulating the space distribution of an optical field which acts with the graphene layer; the graphene layer (8) is formed on the one-dimensional optical grating and serves as an active layer to act with the surrounding optical field to generate an electron hole pair; the first interdigital electrode (4) and the second interdigital electrode (5) are formed on the graphene layer (8), the first interdigital electrode (4) and the second interdigital electrode (5) are both in contact with graphene so as to form a built-in electric field on a contact surface, and the built-in electric field is used for effectively collecting photon-generated carriers to form light current. By means of the surface incidence graphene photoelectric detector based on the one-dimensional optical grating, the optical field of incident light around the graphene is modulated through a grating structure, and thereby, high response degree and high bandwidth of infrared detection can be achieved.

The invention relates to a method for manufacturing multi-wavelength VBGs. The method particularly includes the steps that an ultraviolet light passes through a trapezoid prism to irradiate photosensitive dielectric PTR glass; incoming recording light is reflected through an auxiliary optical flat or the PTR glass, the reflected recording light and the incoming recording light are intervened in the PTR glass to form standing waves; the wavelength of a tuning laser source or a rotary laser reflection element enables the incoming angle of the recording light to be changed, and exposure in different periods is achieved; heat processing and cutting are carried out on the PTR glass obtained after exposure, and the multi-wavelength VBGs are finally obtained. The method for manufacturing the multi-wavelength VBGs is concise and practical, continuous tuning of the VBG working wavelength can be achieved under the condition that a recording device is kept unchanged; the clear aperture of the manufactured VBGs is not limited by sample absorption or other kinds of performance of materials; incoming of only one beam of recording light is needed, so that the recoding device is greatly simplified, and the large-amount efficient manufacturing of the VBGs is facilitated.

The invention discloses a suspended 360-degree optical field three-dimension display device and method based on a flat plane display. The device comprises a flat plane display array, a first lens group array, a second lens and a scattering screen which are arranged in sequence, wherein the flat plane display array is formed by splicing a plurality of flat plane displays; each flat plane display is used for displaying one part of various 360-degree sub-images around one circle of a three-dimension object, namely a sub-image sequence; various sub-images in the image sequences displayed by the flat plane display array, each first lens group in the first lens group arrays and various view points of an observation area correspond to one another. One observer can only see one sub-image at one view point. Through controlling the parameters such as the number of the sub-images displayed by the flat plane display array, an optical axis inclined angle of the overall system and the scattering angle of the scattering screen, the eyes of the observer in the observation area can be located in different view points, so that the two different sub-images displayed on the flat plane display array can be observed, and binocular parallax can be produced, thereby reaching the effect of watching three-dimension scenes.

A part-holding fixture is adapted for rotation about a work spindle axis and includes a mounting land that seals a back surface of an optical flat for securing the optical flat to the part-holding fixture and that inclines the back surface of the optical flat through a wedge angle for grinding wedged optical flats at repeatable wedge angles.

A photovoltaic conversion assembly comprises an optical slab with first and second major surfaces and an intermediate surface therebetween. Light energy to be collected impinges as incoming photons on the first major surface. At least one PV cell is mounted to receive light energy from the intermediate surface of the optical slab and convert such light energy to electrical energy. The PV cell has a highest band gap E. A down-converting structure is located on the second major surface of the slab for converting to lower energy light received through the slab, with at least about 75 percent of the converted light having an energy level above the band gap E. A two-way spectrally selective reflector, located proximate the first major surface, cooperates with the down-converting structure for preventing high angle light from undesirably exiting the optical slab via the first major surface.

The invention relates to a phase-controllable birefringence space light bridge, which uses a combined birefringence optical flat to achieve light splitting synthesis of two input light beams, wherein a quarter-wave plate performs phase-shift control and is used for space compounding of a laser communication signal light beam and a local oscillation laser beam in a coherent optical communication receiver and outputting four paths of synthesized light beams with a required phase-shift relation so as to achieve 2*4 space light bridging. The quarter-wave plate makes two perpendicular polarized components generate 90-degree phase shift, and the phase difference between the two components can be changed by rotating the optical axis direction so as to compensate phase errors generated by errors of processing, assembling, calibration and the like, thus the phase-controllable birefringence space light bridge has the advantages of simple structure, stable performance and controllable phase. The phase-controllable birefringence space light bridge is applicable in the field of free space laser coherent communication and laser radar.

The invention discloses a method for manufacturing a sensitized extrinsic F-P optical fiber temperature sensor, which belongs to the technical field of a sensor. The method is characterized by comprising the following steps that: deficiency is generated by carving, and a flat end surface of an optical fiber is formed by tensing carved deficiency and using the characteristic that stress on the carved deficiency is concentrated; and a metal capillary tube and a bare optical fiber of an extrinsic F-P interface cavity are bonded together by a bonding agent, and the sensitized extrinsic F-P optical fiber temperature sensor is formed by two optical flat end surfaces and the metal capillary tube which has thermal expansion coefficients more than those of a glass capillary tube. The method has the advantages that the sensitized extrinsic F-P optical fiber temperature sensor which has excellent optical end surface and has no impurities in the interference cavity can be obtained, has fast temperature response, high temperature sensitivity, small volume, simple structure, high reliability, flexible manufacture, and the like, and can be used for high accuracy temperature measurement in strong electromagnetic radiating, inflammable and explosive and other situations.

The invention relates to the field of laser marking. The invention discloses a laser marking device for section steel, which includes a computer system, a laser, and an optical flat-field mirror located below the light-emitting part of the laser. It is characterized in that it also includes a main workbench trolley , workpiece, laser X-direction precision sliding table, laser Y-direction precision lifting mechanism, guide rail, driven work trolley, among which, the main workbench trolley and the slave work trolley are on the guide rail, and the workpiece is placed on the main workbench trolley and the slave work trolley The upper surface of the trolley is located below the optical flat field mirror. The invention has high efficiency, does not affect the performance of workpieces, can realize laser marking on large workpieces, changes the operation mode of manual painting on section steel for model marking, and can mark permanent pictures and texts on section steel.

The invention discloses a light projection device used for the three-dimensional measurement of an object surface. Laser generated by a laser generates polarized light through an optical expansion unit, a mirror and a first polarizing piece. The polarized light is projected to front and back surfaces of a first sensitive optical flat plate, and forms two light paths through the sensitive optical flat plate. The first light path forms vertical polarized light through a second polarizing piece, and the vertical polarized light is projected onto a second sensitive optical flat plate through a first optical wedge pair. The second light path forms vertical polarized light through a third polarizing piece, and the vertical polarized light is projected onto the second sensitive optical flat plate through a second optical wedge pair. Two light paths form combined beam through the second sensitive optical flat plate, and the combined beam is enlarged sequentially through a 1/4 wave piece, an adjustable polarizing piece and a projection objective, and is projected onto the measured object surface. According to the invention, a polarization technology and a phase shift stripe technology are combined; the three-dimensional topography of the surface of various objects of different structures is measured by a machine/off-machine; and the light projection device has strong abilities of vibration resistance and noise dynamic, and especially has strong robustness for the surface measurement of molds with complex structures.

The invention relates to a method for realizing beam orbital angular momentum spectrometry, which belongs to the technical field of laser application. The invention consists of a light source to be tested, two polarization dispersion prisms, 1/2 wave plate, two parallel optical flats, two pieces of 1/4 wave plates, a total reflector, a rectangular prism, a Porro prism, a Pi/2 phase delay piece and a power detector. The invention adopts the two parallel optical flats and the rectangular prism to realize the beam splitting and the beam combining of the beams, ensure the good parallelism of beam splitting light and the coaxiality of beam combining light, and realize the complete identical optical paths and attenuation of the two bunches of light. The invention adopts the polarization dispersion prism, the total reflector, the Porro prism and the two 1/4 wave plates to realize the beam splitting, and the two bunches of light obtained by the beam splitting rotate coaxially to further realize the coaxial superimposition of the beam and a rotating mirror image thereof. The orbital angular momentum spectrum of an incident beam can be analyzed by measuring the relation between the power of the beam combining light and the rotation of the Porro prism. The method of the invention has application value in the laser intelligence processing field.

The invention discloses a tuning method for an optic tunable filter, wherein the optic tunable filter is a thin or ultrathin optic parallel plate and the tuning of the optic tunable filter is realized by changing the optical path difference of lights in the optic plate. The ultrathin optic parallel plate is a micron-level ultrathin plate, which is made of materials having a certain optical band and the refractive index or thickness of which can change following the change of temperature field, electric field or magnetic field; a better filtering property also can be achieved under the condition of being free from plating a high-reflectance coating, by utilizing the characteristics that the reflectance is high when the light enters into a natural optical surface in grazing incidence manner (theta is more than 80 degrees); and the ultrathin optic parallel plate also can be made of common materials, through which a certain optical band can permeate, and the tuning of the optic tunable filter can be realized by changing the incident angle of the light by rotating the plate. The invention designs a grazing incidence optic filter, aiming at the difficulty of plating film on the ultrathin plate, thereby solving the difficulty of plating film as well as realizing filtering the optical wave of full-transmission light.

The invention discloses an absolute measurement method of homogeneity of an optical flat, belonging to the field of optical interferometry. The method comprises the following steps: 1. putting detected optical flat into a measurement light path, and measuring the wave surface deviation of interference cavities formed by the front and back surfaces of the optical flat; 2. putting the optical flat into an interferometry cavity formed by reference optical flat working surfaces and reflection optical flat working surfaces, and measuring the aberration of waves reflected by the optical flat; 3. removing the detected optical flat from the interferometry cavity, and measuring the wave surface deviation of the interferometry cavity formed by the reference optical flat working surfaces and reflection optical flat working surfaces; and calculating the homogeneity distribution of the detected optical flat according to the three measurement results. The method has the advantages of fewer steps and high accuracy, is simple to operate, and can be used for high-precision measurement of refractivity homogeneity distribution of the optical flat for laser working materials and spacecraft window glass.

The invention provides an optical flat structure achieving air imaging. The optical flat structure is characterized by comprising an upper lens and a lower lens which are overlaid in a closely attached mode; the upper lens and the lower lens are both formed by multiple reflecting bars which are perpendicular to the lens surface and arranged in parallel, reflecting films are arranged on the two side faces of each reflecting bar respectively, and the reflecting bars of the upper lens and the reflecting bars of the lower lens are arranged in an orthogonal mode. According to the optical flat structure, through an optical panel reconstructed through a special precise microstructure, a two-dimensional or three-dimensional light source can form a real image in air directly to realize a real holographic image; the structure is simple, a real image can be directly formed before a user's eyes, and real holographic interaction can be achieved through system integration in the later stage.

The invention belongs to the field of optical precision measurement technology and relates to a reflection cavity type confocal measuring method of super-large radius of curvature. According to the method, by a confocal focusing theory in cooperation with parallel optical flat, a focal position of a measured surface is positioned accurately so as to further realize high-precision measurement of super-large radius of curvature. The method combining the confocal focusing theory and a reflection cavity type folded optical path theory has advantages as follows: displacement distance of a measured piece is small; optical path is simple; measurement precision is high; measuring speed is fast; environmental disturbance resistance is strong; and the measured surface is not damaged. The method provided by the invention can be used in high-precision non-contact measurement of super-large radius of curvature.

The invention relates to a polarizing beam-splitting birefringence space light bridge, which is characterized by consisting of a first 1/8 wave plate, a second 1/8 wave plate, a polarizing beam splitter, a first birefringence optical flat and a second birefringence optical flat, wherein the first 1/8 wave plate, a first incident face of the polarizing beam splitter, a first emergent face and the first birefringence optical flat are arranged in turn along the advancing direction of a first light beam; the second 1/8 wave plate, a second incident face of the polarizing beam splitter, a second emergent face and the second birefringence optical flat are arranged in turn along the advancing direction of a second light beam; and the main cross section of the first birefringence optical flat is parallel to the main cross section of the first 1/8 wave plate, and the main cross section of the second birefringence optical flat is parallel to the main cross section of the second 1/8 wave plate. The polarizing beam-splitting birefringence space light bridge has the advantages of compact structure, stable performance, adjustable phase and the like, and is applicable to a coherent laser communication system with free space transmission.

A vertical shape measuring device capable of compensating shaft system errors of a wafer, which comprises a steel frame base, a platform, a support seat, a beam, a shaft system, a wafer bearing table, a contact-type length measuring device, and an optical flat, wherein the platform is arranged on the steel frame base; the support seat is arranged on the platform; the beam is arranged on the support seat; the shaft system comprises an X shaft, a Y shaft, a Z shaft, and a rotating shaft, the X shaft is arranged on the beam, the Y shaft is arranged on the platform and is perpendicular to the X shaft mutually, the Z shaft is fixed on an X shaft movable plate and is perpendicular to the motion direction of the X shaft mutually, the motion direction of the Z shaft is perpendicular to the measuring platform, and the rotating shaft is fixed on a Y shaft movable plate; the wafer bearing table is fixed on the rotating shaft; the contact-type length measuring device is fixed on a Z shaft movable plate; the optical flat is fixed on the beam parallel to the motion direction of the X shaft. The shape measuring device has simple structure, high integrated level, and full functions, and provides a solution for the measuring of wafer shape parameters.