81 results about "Optical path" patented technology

An optical system is provided, for example for use with a display device, for varying the shape of a surface in which an image displayed by the display device is perceived. The optical system comprises first and second spaced-apart partial reflectors, at least one of which is switchable between a first non-flat shape and a second different shape, which may be flat or non-flat. The reflectors, together with polarisation optics, provide a light path such that light from the display is at least partially transmitted by the first reflector, partially reflected by the second reflector, partially reflected by the first reflector and partially transmitted by the second reflector. Light which does not follow the light path is prevented from leaving the optical system.

A laser processing apparatus including a laser beam branching mechanism provided between a laser oscillator and a focusing unit. The laser beam branching mechanism includes a spread angle adjusting unit for adjusting the spread angle of a laser beam and a branching unit for branching the laser beam into a plurality of laser beams. The branching unit includes a half-wave plate, a first polarization beam splitter for separating the laser beam into P polarized light and S polarized light, a first mirror for reflecting the P polarized light, a second mirror for reflecting the S polarized light, and a second polarization beam splitter for leading the P polarized light reflected by the first mirror and the S polarized light reflected by the second mirror to different optical paths extending in the same direction.

A coupling lens arranged on an optical path of an optical beam from a VCSEL, which has a refraction plane and a diffraction plane that respectively change a power according to a temperature change and suppresses a beam-waist position change in a main-scanning direction and a sub-scanning directions on the scanning surface caused by the temperature change, by a wavelength change of the optical beam caused by power changes of the refraction plane and the diffraction plane and the temperature change. A deflecting unit deflects the optical beam that passed through the coupling lens. A scanning optical system condenses a deflected optical beam on the scanning surface.

The present invention is an image display device in which a two-dimensional image displayed on an image display element is observed by an observer as a magnified virtual image through a virtual image optical system. The second optical plane (15c) on the side of the optical pupil (19) and the reflection and transmission of the optical axis having an angle greater than or equal to 30 degrees and less than 90 degrees with the normal line of the first optical plane or the second optical plane surface (16), which reflects or transmits the image light incident from the incident optical surface (15a), and the incident optical surface makes the relay optical system (12) shown in the image display element (11) ) transited image light incident; reflective optical element (18), reflecting so that the image light reflected on the reflective transmission surface and emitted from the first optical plane is directed to the reflective transmission surface and becomes parallel light; and the phase difference optical element (17), arranged in the optical path between the first optical plane and the reflective optical element, to convert the polarization state of the image light.

A self-adaptive optical system based on voltage decoupling controlled multiple wave-front correctors. The self-adaptive optical system based on the voltage decoupling controlled multiple wave-front correctors comprises a plurality of wave-front correctors, a spectroscope, a wave-front sensor and a wave-front processing machine; the plurality of wave-front correctors are distributed in an optical path in a series connection mode; the wave-front sensor and the wave-front corrector with the highest accuracy satisfy a conjugated relation; the wave-front corrector with the highest accuracy directly performs high-accuracy correction on wave aberrations through a slope method, other wave-front correctors perform voltage decoupling separation on low order wave-front aberrations according to a correction voltage decoupling algorithm of the wave-front corrector which is provided with the highest accuracy, perform type mold correction on specific aberration and directly perform correction on all aberrations through the slope method, finally the correction aberrations of every wave-front corrector are overlayed to achieve high accuracy correction of the overall aberrations. The self-adaptive optical system based on the voltage decoupling controlled multiple wave-front correctors is mainly applied to a light beam purification self-adaptive optical system and the optical fields which have severe aberration change and need a plurality of self-adaptive system combined correction such as correction of atmosphere turbulence and thermal blooming.

The invention relates to a device for detecting methane or carbon dioxide through optical interference, which comprises an optical path system using the same optical source to generate two groups of optical interference stripes, an image sensor converting the physical position information of the two groups of stripes into electric signals, and an electric signal collecting and processing part used for identifying the physical positions of the two groups of stripes and finally determining the methane content in the air. The invention also comprises a method for detecting the concentration of methane and carbon dioxide with the advantage of automatic zero tracking and precision automatic compensation capacity. The device and the method have the characteristic of adopting two groups of stripes in the same optical path to realize the differencing of the optical images; then the whole system processes data in a differencing mode, which greatly improves the anti-interference capacity of equipments. The device and the method are based on the automatic compensation principle of instrument precision, solve the difficulties of severe precision unbalancing and severe zero point excursion of the traditional optical interference methane detecting instrument caused by the aberration of the optical system, can intelligently identify when the precision of the instrument is severely unbalanced, and can effectively calibrate.

The invention relates to the technical field of laser surface micro modeling, in particular to a laser micromachining device for the inner surface of an engine cylinder and a machining method of the laser micromachining device. An object machined by the laser micromachining device is an engine cylinder body; because the machined objects have irregular shapes, larger size and larger mass, a machining scheme that a workpiece is used for fixation and a laser head not only rotates but also takes a linear motion up and down is adopted. Through adopting the laser micromachining device disclosed by the invention, laser beams are output from an inner light path of a laser, pass through an outer light path system and then are focused by a focusing lens inside the laser head and then reflected to the machining surface of a workpiece through a total reflection mirror; and the laser outputs a single laser pulse at specified time on a specified machining point by dint of the coordination and the interaction of a numerical control system on the motion control of various axis of a work table and the single pulse output control of the laser, and therefore the laser micromachining of the surface of the workpiece is realized.

The present invention discloses a multi-channel aerosol scattering absorption measuring instrument, comprising a light path device, a detection device and a gas path device. The light path device supplies three different wavelengths of laser entering the detection device in sequence; the detection device is provided with photoelectric detectors at multiple angles for measurement, so as to reduce the measurement error of aerosol scattering coefficient; the gas path device comprises a sample loading unit, a calibration unit and a sample discharging unit; and a light source from the light path device and a gas flow from the gas path device enter the photoacoustic cavity of the detection device respectively and are detected by a control unit. The aerosol scattering absorption measuring instrument of the present invention is characterized by multi-channel, multi-angular, full-scale and direct measurement of scattering phase function and absorption coefficient of aerosol particles, combines the function of synchronously acquiring the optical parameters of an aerosol (such as scattering coefficient, extinction coefficient, visibility, transmittance, single scattering albedo, etc.), and achieves the integrated on-line detection of different optical parameters of an aerosol with high automation degree and good stability.

The invention discloses a full-light information collection system. Specifically, the system is characterized in that a spectrum image of sparse sampling is obtained by a sparse sample imaging array, a light splitting device, a gray scale imaging device and a spectrum light path collection device; a color image with high resolution is obtained by a color imaging device and a color light path collection device; light axes of the spectrum light path collection device and the color imaging device are parallel, the obtained two images respectively includes spectrum information of the sparse sampling and color information of the high resolution, and the obtained two images includes parallax information; finally, the two paths of information are processed by an information combined processing device, full-light information including a spectrum and a depth is reestablished according to the sparse spectrum information, the color information and the parallax information due to different poses of two cameras. According to the invention, the combined obtaining of the full light information is realized, and the higher spectrum resolution and the more precise depth information can be obtained by adopting the imaging device higher in precision.

The invention discloses a light source system and a projector. The light source system comprises a wavelength conversion apparatus, a filtering apparatus and a dodging apparatus. The wavelength conversion apparatus comprises at least two fluorescent areas, wherein different fluorescent areas are provided with different wavelength conversion materials which generate exited light with different wavelength coverage areas; the filtering apparatus is provided with N light processing diaphragms which are successively arranged in the emergent light path of the excited light, wherein a one-to-one correspondence is formed between the light processing diaphragms and the fluorescent areas in the wavelength conversion apparatus; each light processing diaphragm reflects the excited light generated by the fluorescent area in the wavelength conversion apparatus corresponding to the light processing diaphragm to the dodging apparatus, wherein a minimum N is the number of the fluorescent areas of the wavelength conversion apparatus; the light processing diaphragms are curved surface diaphragms. According to the invention, the problem of greater space occupation caused by the loosened structure of a light source system of the prior art is solved.

To improve optical power detection accuracy without increasing size, etc. of a device, when controlling a plurality of light variable parts such that the sum of a plurality of optical powers becomes the minimum. Provided is a wavelength tunable light source for changing the wavelength of light by using a multiple resonator including two or more coupled resonators with different optical path lengths from each other. The light source includes: a single or more light variable part for changing transmittance of the resonators; photosensor parts which detect each light outputted from the two or more resonators by each of the resonators as optical powers being converted into electric power values; and a control unit which adds the optical powers detected by the photosensor parts by each resonator, and controls changes in the transmittance by the light variable parts such that the sum of the added optical powers becomes the minimum.

A method and apparatus for projecting an image of a patient to intersect a display screen which is nonperpendicular to an adjacent portion of an optical path and adjacent a sterile operative field. A video projector system and accompanying optics impart at least one of a tilted focal plane or depth of focus to the projected image. The optical path of the projected image is located adjacent the surgical field. An initially sterile display screen is located in the optical path adjacent the sterile field so that a normal to the screen is noncoincident with the optical path and the projected image on the screen is of constant focus across the screen. The initially sterile display screen may be degradable upon cleaning and resterilization so that a new screen must be used with each procedure, thus insuring the optical quality and sterility of the screen. The display screen may be supported adjacent the surgical field by an articulated rod assembly. The rod assembly may have an upper rod shaped like a "dog leg" for providing easy access by the surgical team for rotating and moving the system up and down. A lower rod of the rod assembly may be connected to the upper rod with a universal joint for adjusting screen location and quickly moving the display screen out of the surgical field.

A semiconductor-based tunable optical dispersion compensation method and apparatus for multiple channels. In one aspect of the present invention, an apparatus according to an embodiment of the present invention includes a semiconductor material. An optical path through the semiconductor material is included. The optical path is optically coupled to receive an optical beam. A nonlinearly chirped Bragg grating is disposed in the semiconductor material. The optical path includes the nonlinearly chirped Bragg grating to substantially reduce chromatic dispersion in the optical beam.

A system, apparatus and method for testing optical fiber systems by providing a near-end and far-end harness that loops the set of fibers in the fiber system together. The near-end harness has an interface to connect to the tester. The tester then effects testing on the entire set of fibers, which are looped together by the configuration of the two harnesses creating a single optical path that traverses the entire set or subset of fibers in the network, so a launched test signal propagates through the entire set of looped fibers, providing measurement results for the fibers.

A mounting apparatus includes a substrate; an optical component having a first surface on which light from the substrate is incident and a second surface from which the incident light goes out after the incident light is refracted; an adjustment unit that adjusts a position of the substrate and a position of the optical component by moving the substrate and the optical component relatively with the first surface of the optical component and the substrate being opposed to each other; an imaging unit that is arranged in an optical path of the light that goes out from the second surface; and a control unit that controls an amount by which the adjustment unit moves the substrate and the optical component relatively according to image data which is captured by the imaging unit, and that mounts the optical component on the substrate.

The invention discloses a full-spectrum detector for rapidly detecting foods and a detection method of the detector. According to the full-spectrum detector, the output end of an ARM (Advanced RISC Machines) embedded type system is connected with a power stabilizing circuit, a broadband light source and an illumination optical fiber in sequence, wherein incident light transmitted by the broadband light source is irradiated to a solution to be tested in a sample tank through the illumination optical fiber and is partially absorbed by the solution to be tested to obtain emergent light; the emergent light is led into a full-spectrum light-splitting light path by a measurement optical fiber to be subjected to light splitting and then is irradiated to a CCD (Charge Coupled Device) detector; the CCD detector is used for detecting the light-split emergent light and sending detection data to a signal acquisition circuit; the signal acquisition circuit is used for processing measurement data to obtain full-spectrum information and sending the full-spectrum information to the ARM embedded type system; the ARM embedded type system is further connected with a data storage chip and a display module. The full-spectrum detector is small in volume, compact in structure and convenient to carry, can be used for measuring accurately and can be widely applied to field detection on the foods.

The invention discloses a pump-probe method based on Z-scan. A laser beam is divided into two beams; pumping light is focused on samples to be measured through time delay, so that a non-linear sample generates nonlinear absorption and nonlinear refraction; emergent probe light is divided into two beams through a spectroscope, wherein one beam directly enters a first probe, and the other beam enters a second probe after passing through a diaphragm of small pore diameter with a center coinciding with an optic axis. The pump-probe method is characterized in that phase objects are arranged in the front of a convex lens in a probe light path; the method for measuring the light comprises the following steps: (1) the samples to be measured are put in place, and the energy of the probe light at different times is collected by two probes respectively; (2) a energy curve of the probe light at different delay times is processed, so as to obtain optical nonlinear parameters. A measuring system working according to the method has the advantages that the light path is simple; the data treatment is simple; nonlinear absorption and refraction can be measured simultaneously without the need of separate measurement, and the size and the symbol of the nonlinear refraction can be measured simultaneously; the measuring results are accurate, etc.

The invention belongs to the technical field of optical fiber measurement, and particularly relates to a common-path forward-reverse simultaneous measuring device for a fiber optic gyroscope ring. The common-path forward-reverse simultaneous measuring device for the fiber optic gyroscope ring comprises a light source device, a testing device 11, an optical path correlator 12, and a photoelectric signal conversion and signal recording device 13, wherein the optical path correlator 12 consists of a first six-port coupler 121, a second six-port coupler 122, a first collimating lens 123, a second collimating lens 124 and a scanning table 125. By adopting the common-path forward-reverse simultaneous measuring device, the testing time of a fiber optic gyroscope ring polarization coupling measuring device is shortened, the measurement efficiency is improved, the influences of environmental factors such as temperature are eliminated, and the polarization coupling symmetry of the fiber optic gyroscope ring can be obtained accurately.

The invention discloses near-eye display apparatus and equipment, a zooming module and a zooming method, for solving the technical problem that a current display device is lower in the zooming effect.The near-eye display apparatus comprises a display module, a zooming module and a near-eye display slab waveguide, wherein the display module, the zooming module and the near-eye display slab waveguide are arranged along the optical path successively; the zooming module comprises an electrode unit and overlapped multi-layer PBLs (Pancharatnam Berry Lens); the electrode unit is used for applying/not applying voltage to the PBLs; each layer of PBL is an optical component which is made of liquid crystal and is based on geometric phase adjustment, and each layer of PBL has one focal power when novoltage is applied; during the projection process, the display module is used to emit circularly polarized light corresponding to an image to be displayed; the zooming module is used to receive the circularly polarized light and control the electrode unit to apply no voltage to N layers of PBLs according to the required focal power; and the total focal power of the N layers of PBLs is corresponding to the required focal power, and when N is greater than or equal to 2, the N layers of PBLs are continuous, and the near-eye display slab waveguide is used to import the light emitted from the zooming module into a human eye.

The invention relates to an off-axis optical path three-dimensional microscopic topography measurement system. The system comprises an imaging object lens, an interference device and an image acquisition device. The interference device comprises a laser light source, a beam splitter prism, a first reflector, a second reflector, a fine adjustment reflector and a reference object lens. A laser lightbeam irradiates on the beam splitter prism via the first reflector and then outputs two light beams, the first light beam irradiates on a sample through an imaging object lens, and a reflected lightarrives at the image acquisition device via the imaging object lens and the beam splitter prism; the second light beam irradiates on the fine adjustment reflector via the second reflector and the reference object lens, the reflected light irradiates on the image acquisition device via the reference object lens, the second reflector and the beam splitter prism and forms a reference light, an off-axis angle of 1.52-7.57 degrees is formed between an object light and the reference light, thus, off-axis interference is formed, and an interference hologram is obtained through recording of the imageacquisition device. By optical path design, the system provided by the invention overcomes the difficulty that the conventional pre-magnified microscopic optical path optical wave curvature is difficult to adjust. The whole system is compact in structure and has high anti-noise ability.

The invention belongs to the field of optical grating processing technology research, and specifically relates to a device and method for processing a holographic gold optical grating through pulse laser. The device comprises a pulse laser, a beam expanding collimating system, a first reflector, a glass substrate, an angle adjustment spacer, a second reflector, an electric displacement platform, and a control computer. The method employs a solid pulse laser, combines with the holographic imaging technology, employs the holographic recording technology of equal thickness interference and enables a processed system to employ an optical path structure, and the beam splitting interference of the pulse laser does not need to be performed in the process, thereby improving the stability of the system. Moreover, the method can achieve the flexible adjustment of the line scribing period of the optical grating and the area of the optical grating, is good in stability, is high in processing efficiency, and can flexibly adjust the line scribing period of the optical grating and the area of the optical grating. The device and method are implemented based on the pulse laser and the equal thickness interference technology.

Optical block assemblies having single or multi-stage folded light path lens assemblies that may be implemented to allow an optical block assembly to occupy significantly less space and/or present reduced rotational inertia to an electrical articulating mechanism. An optical assembly may be so configured for closed circuit television applications or in any other suitable video imaging application including, but not limited to, applications involving non-articulated or articulated cameras such as normal filming (e.g., motion picture film cameras or studio television cameras), camcorders, military targeting or imaging devices, etc.

The invention discloses a high-power laser targeting optical path adjusting system and method based on LabVIEW. The system comprises a vacuum cavity, an industrial control computer based on a LabVIEW exploitation platform, a laser spot collection unit connected with the industrial control computer and a laser spot position adjusting unit. The industrial control computer comprises a completely new optical path monitoring and optical path adjusting man-machine interaction interface which is exploited based on LabVIEW. The position of an optical path is determined by the spatial positions of laser spots mapped in a CCD, a LabVIEW exploitation multi-thread parallel operation mechanism is utilized to exploit multi-controller software of different models and different communication modes in an integrated manner, and precise fine tuning of a laser path under a vacuum environment is realized. Laser experiment scientific research personnel can directly utilize the system to conveniently and rapidly carry out experiment optical path optimization and adjustment, the work load of optical path adjustment in the experiment research is reduced, and manpower and material resources are substantially saved.

The embodiment of the invention discloses a laser light path system and a double-head laser marking machine, and relates to the technical field of laser processing equipment. The light path system comprises a laser generator, a light path input module, a light splitting module, a light path output module and a light emitting control module, the laser emitted by the laser generator is guided into the light splitting module through the light path input module, the light splitting module is used for dividing the laser into two beams, the light path output module is used for outputting the laser,the light emitting control module is used for controlling the laser in the light splitting module to pass through the light path output module. According to the provided laser light path system, a vertical light path structure is adopted, the light path input module, the light splitting module and the light path output module each are independently provided with light path structures, moreover, the light path structures communicate with one another, and the laser light path system is simple and compact in structure, high in light path stability and high in light beam quality.

The invention relates to a wavelength modulation absorption spectrum absorption optical path and gas concentration synchronous inversion method. The method comprises the following steps: (1) acquiringan absorption signal It and a background signal It, 0; (2) obtaining a first harmonic phase baseline value and a first harmonic phase angle differential signal delta theta 1f-0 of which background signals are deducted by adopting a quadrature demodulation method; (3) solving an absorption optical path Labs by adopting a formula; and (4) performing least square method linear fitting on the differential phase angle delta theta 1f-0 of which the background is deducted by adopting the following formula so as to obtain the concentration of to-be-detected gas, according to the present invention, with the method, the defects in the prior art can be overcome, the absorption optical path and the gas concentration can be rapidly and synchronously inverted, the high-sensitivity absorption optical path and the gas concentration detection can be achieved, and the method is especially suitable for the gas detection environment with the obvious noise such as remote measurement and the like.

The invention discloses a composite light beam metal SLM printing system based on Gaussian light beam and light beam shaping and a dual-light-source composite light beam metal SLM printing system. The dual-light-source composite light beam metal SLM printing system comprises a light beam shaper, a light beam coupler and a Gaussian light beam metal SLM printing system, and the light beam shaper and the light beam coupler are sequentially arranged between a first variable magnification speed expanding mirror and a fifth total reflection mirror. A second Gaussian light emitting unit is arranged in the vertical direction of the light beam coupler and comprises a second laser, and a second collimator, a second half-wave plate, a second polarizer and a second variable magnification beam expander which are sequentially arranged in the propagation direction of Gaussian beams emitted by the second laser. The invention further provides a single-light-source composite light beam metal SLM printing system. The system can use a single light source and double light sources to freely combine Gaussian light, annular light and flat-top light, different light paths are freely switched on the basis of the light beam shaping technology, the printing speed, efficiency and quality of parts are improved, and application and popularization of the SLM technology are promoted.

The invention belongs to the technical field of laser ranging, and particularly relates to a delay value real-time validation system, method and device of a laser ranging system. The system includes: a laser, an optical pulse beam expanding system, a main wave sampling circuit, a broken axis optical path group, a guide optical path group, an optical reverse reflection device, a photoelectric detector, a time interval counter, a transmitting telescope, a receiving telescope and a clock. The real-time performance and accuracy of the delay valiation of the system are improved, and the delay value real-time validation system, method and device have the very important significance for improving the quality of the observed data and improving the accuracy of the observed data.