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Device and method for inhibiting laser speckles and laser display projection system
InactiveCN104777626AReduce coherenceReduce Speckle ContrastLaser detailsProjectorsPhysicsProjection system
The invention discloses a device and method for inhibiting laser speckles and a laser display projection system. The device comprises a plurality of noncoherent lasers, an optical fiber coupler and an optical fiber bundle. Multiple paths of light beams output by the lasers are coupled into sub optical fibers of the optical fiber bundle through the optical fiber coupler. The light beams transmitted in the sub optical fibers are called sub light beams. The adjacent sub light beams of the same frequency output by the output end of the optical fiber bundle have the preset distance in space. The sub light beams of the same frequency irradiate a screen at different angles through a projection system due to the set preset distance, so that speckle patterns observed by human eyes are independent from one another. According to the device, the coherence of the light beams is lowered through the noncoherent lasers, and thus the speckle contrast is lowered; the sub light beams are distributed according to the angle diversification of the speckles at the output end of the optical fiber bundle, and the independent speckles are superposed in the space to lower the speckle contrast; the speckle inhibiting effects of the two methods can be superposed, and the speckle contrast is lowered to a greater extent.
Owner:ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
Illumination device, projection type image display device, and optical device
ActiveUS20150036108A1Speckle suppressionTelevision system detailsProjectorsImage formationOptical scanning
To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable.An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11; and an optical path conversion system 21 configured to allow the coherent light scanned by the optical scanning section 15 to illuminate an area to be illuminated sequentially in an overlapping manner. An incident angle of the coherent light that enters respective points of the area to be illuminated changes with time.
Owner:DAI NIPPON PRINTING CO LTD
System and method for production of nanostructures over large areas
ActiveCN103403621AEasy to manufactureSpeckle suppressionPhotomechanical exposure apparatusPhotosensitive material processingOptoelectronicsCollimated light
A method and apparatus for printing a pattern of periodic features into a photosensitive layer, including the steps of providing a substrate bearing the layer, providing a mask, arranging the substrate such that it has a tilt angle with respect to the substrate in a first plane orthogonal thereto, providing collimated light for illuminating the mask pattern so as to generate a transmitted light-field composed of a range of transversal intensity distributions between Talbot planes separated by a Talbot distance, and so that said transmitted light-field has an intensity envelope in the first plane, illuminating the mask with said light whilst displacing the substrate relative to the mask in a direction parallel to the first plane and to the substrate, wherein the tilt angle and the intensity envelope are arranged so that the layer is exposed to an average of the range of transversal intensity distributions.
Owner:EULITHA
Laser light source special for laser projector
ActiveCN105182674ACoherence length reductionSpeckle suppressionProjectorsOptical elementsBeam splitterPhase difference
The invention discloses a laser light source special for a laser projector. The laser light source comprises a laser emitting part (1-3) and a feedback interference system, wherein the feedback interference system comprises a phase modulator (5), a polarizing beam splitter (6) and a reflecting mirror (7) which are arranged along the light path in turn; the laser beam emitted from the laser emitting part (1-3) is a linearly polarized light which enters into the phase modulator (5); the phase difference is generated for the phases of a P polarized light component and an S polarized light component in the laser beam by the phase modulator (5), so that the polarization state of the laser beam is changed; the laser beam outputted from the phase modulator (5) enters into the polarizing beam splitter (6); the P polarized light component of the laser beam is transmitted to the reflecting mirror (7) by the polarizing beam splitter (6) and is reflected to the polarizing beam splitter (6) by the reflecting mirror (7); after the P polarized light component is transmitted, the P polarized light component returns to the laser emitting part (1-3) through the phase modulator (5); the S polarized light component of the laser beam is reflected by the polarizing beam splitter (6).
Owner:SINOLASER PROJECTION TECH
Low-coherence chaotic laser for laser display
PendingCN108681097ASimple structureSmall sizeLaser output parameters controlOptical elementsLight beamOptoelectronics
The invention discloses a low-coherence chaotic laser for laser display and relates to the field of light sources for laser display. The laser mainly comprises a TO package laser housing having threepins at the outer side. A laser chip is fixed to a support frame in the TO package laser housing. A cemented lens is fixed to the light-emitting window of the TO package laser housing and is formed bycombining a collimating lens and a transflective lens which are successively placed along an optical path and are fixed in such a way of clinging to each other. The contact inner sides of the collimating lens and the transflective lens are plated with a transflective film. The laser exit center of the laser chip is located at the focal length of the collimating lens. A laser beam is collimated bythe collimating lens and then passes through the transflective lens. The transflective film on the transflective lens transmits a part of the laser beam, and reflects the other part of the laser beamback to the laser chip. Thus, a feedback is provided for the laser chip to form a chaotic laser, thereby reducing the coherence of the laser, achieving speckle suppression, and facilitating the structure optimization and integration of a laser display system.
Owner:TAIYUAN UNIV OF TECH
Projection type image display device
InactiveUS20080316373A1Projected image is suppressedSpeckle suppressionTelevision system detailsPicture reproducers using projection devicesLight beamPhysics
A beam modulated by a video signal scans a projected region. A spot size of the beam in the projected region is set to be smaller than a width of one pixel in a direction vertical to a scanning direction. A group of pixels disposed in the scanning direction is scanned by the beam a plurality of times to display one screen. A scanning position of the beam with regard to the group of the pixels is shifted in the direction vertical to the scanning direction for every scanning turn to display one screen.
Owner:SANYO ELECTRIC CO LTD +1
Radar image spot noise suppression method based on correlation loss convolutional neural network
ActiveCN108629746ALimit speckle suppression performanceSpeckle suppressionImage enhancementImage analysisCorrelation coefficientMean square
The invention discloses a radar image spot noise suppression method based on the correlation loss convolutional neural network. The method comprises steps that a radar image is inputted into the trained convolutional neural network to obtain the spot noise suppression result image; the training method of the convolutional neural network includes steps that spot noise is superimposed to a remote sensing image to obtain the image after spot noise superimposition, and the image after spot noise superimposition is inputted into the convolutional neural network to obtain a training output image; error loss is obtained according to a mean square error of the remote sensing image and the training output image, and correlation loss is obtained through utilizing a correlation coefficient between the remote sensing image and the training output image; reverse propagation is performed through utilizing the error loss and the correlation loss, and weight parameters of the convolutional neural network are updated; the trained convolutional neural network is obtained. The method is advantaged in that the error loss and the correlation loss are utilized, the weight parameters of the convolutionalneural network are updated, and thereby the radar image spot noise suppression effect of the network is effectively improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Three-dimensional morphology measurement method for inhibiting speckles on the basis of wide-spectrum laser
InactiveCN106441144ASpeckle suppression3D imaging is clearUsing optical meansPoint cloudThree dimensional morphology
The invention discloses a three-dimensional morphology measurement method for inhibiting speckles on the basis of wide-spectrum laser. The method comprises the following steps: a step of outputting a wide-spectrum laser source to the surface of a measured object for scanning; a step of extracting center point pixel coordinates of light spots of scanned images; and a step of converting the center point pixel coordinates to obtain three-dimensional point-cloud data of the measured object. According to the method, the wide-spectrum light source is output when a laser is at a coherent collapse state, for carrying out accurate three-dimensional surface morphology measurement, such that the speckles are effectively inhibited from a hardware perspective, the technical problem that high-frequency useful information in the images are filtered is solved, the image sharpness is improved, and the application field is wide.
Owner:TIANJIN UNIV
Semiconductor laser driving method and driving circuit
ActiveCN106410602AGuaranteed normal launchWide wavelength rangeLaser detailsSemiconductor lasersState of artTime segment
An embodiment of the invention relates to the technical field of semiconductor lasers, and more particularly to a semiconductor laser driving method and driving circuit for solving the problems of complicated structure and high cost as a speckle eliminating device is added mostly outside a laser in the prior art. In the embodiment of the invention, driving signals are generated in accordance with driving periods of a semiconductor laser, one driving period includes a high level duration segment and a low level duration segment, and driving signals in the high level duration segment of one driving period are composed of N pulses, where N is an integer greater than one; peak values of at least two of the N pulses are not equal, and / or at least two pulse intervals in N-1 pulse intervals formed by the N pulses are not equal; and the driving signals are outputted to the semiconductor laser. Therefore, the speckle suppression or elimination can be performed without the addition of a speckle eliminating device, and the structural complexity is reduced.
Owner:QINGDAO HISENSE LASER DISPLAY CO LTD
Laser light source device, and projection system and control method thereof
ActiveCN111142325ADestroy temporal coherenceShorten the timeProjectorsOptical elementsLight spotControl signal
The invention discloses a laser light source device, a projection system and a control method of the projection system. According to the device, a laser beam is coupled into a multimode optical fiberfor transmission by adopting an optical coupling component, and the laser beam passing through the multimode optical fiber can generate random propagation time change, so that the time coherence of the laser is destroyed; then the laser beam passing through the multimode optical fiber enters an electro-refractive index changing component again, and a control signal is applied to the electro-refractive index changing component, so that the refractive index of a medium at the incident position of the laser beam is changed, and a spatial phase difference is generated at different positions by a light spot when the laser is emitted so as to reduce the spatial coherence of the laser; and the laser beam passing through the electro-refractive index changing component is incident to a light homogenizing component to further homogenize the laser beam. According to the laser light source device provided by the embodiment of the invention, the time and space coherence of the laser can be reducedat the same time, and speckles generated by the laser are effectively inhibited.
Owner:QINGDAO HISENSE LASER DISPLAY CO LTD
Static laser speckle reduction method combining multimode optical waveguide and diffractive optical device
ActiveCN109656029AAchieve Laser Speckle SuppressionImprove reliabilityOptical devices for laserOptical elementsDiffraction orderImaging lens
The invention provides a static laser speckle reduction method combining a multimode optical waveguide and a diffractive optical device. The method comprises the following steps that Step 1, a laser beam is collimated and then input into the diffractive optical device, the diffractive optical device outputs the incident collimated laser beam as diffraction beams with different diffraction orders;Step 2, the diffraction beams with the different diffraction orders are focused by a lens, the focused beams are input into the multimode optical waveguide, the multimode optical waveguide modulates the transmission delay of different diffracted beams, so that the diffraction beams of all diffraction orders are output from the multimode optical waveguide at the delay difference delta T; Step 3, the diffraction beams output at different delays are collected by an imaging lens and imaged on a projection screen, the projection screen is provided with a rough surface, an image on the projection screen is received and processed by a digital camera, and the static laser speckle suppression is achieved. The static laser speckle reduction method combining the multimode optical waveguide and the diffractive optical device has the advantages that the reliability is high, electric energy supply is not needed, the response time is short, no mechanical running mechanism is needed, the system is simple, the size is small, and the cost is low.
Owner:ZHEJIANG UNIV OF TECH
A Design Method of Diffractive Optical Element Based on Spatial Partial Coherent Light
ActiveCN108152949BThe Phenomenon of Weakening the Light Field Amplitude Random Expansion and CancellationSpeckle suppressionGeometric CADSpecial data processing applicationsComplex amplitudeImaging quality
The invention provides a method and device for designing a diffractive optical element. The method comprises the steps of S1, superposing the image light field complex amplitude of an image to be diffracted at a preset distance and the partially coherent light field of a partially coherent light source to obtain the interference complex amplitude; S2, substituting the light intensity of the partially coherent light field into the phase of the interference complex amplitude to obtain the diffractive complex amplitude; and S3, enabling the phase of the diffractive complex amplitude to serve as the transmittance to design the diffractive optical element. According to the method and device provided by the invention for designing the diffractive optical element, the characteristics that the coherent part of the partially coherent light can be coded and modulated and a non-coherent part of the partially coherent light can be averagely speckled are applied to the field of diffractive opticalelement design, a phenomenon of random rise and elimination of the light field amplitude is weakened while wavefront modulation is achieved, the speckles are suppressed, and the image quality is enhanced.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Optical measuring system based on integrating sphere
InactiveCN108981911ASynchronous measurement of energy parametersSynchronized measurement timeSpectrum investigationPhotometry using electric radiation detectorsFiber couplerManufacturing cost reduction
The invention discloses an optical measuring system based on an integrating sphere. The system comprises an incident laser, a beam narrowing mirror, the integrating sphere, an energy meter, a photoelectric tube, a fiber coupler, a computer, an oscilloscope and a spectrometer. The integrating sphere is provided with a light in port and three light out ports. The beam narrowing mirror is arranged atthe light in port, and the energy meter, the photoelectric tube and the fiber coupler are arranged at the three light out ports. An output end of the energy meter is connected to the computer, and anoutput end of the photoelectric tube is connected to the oscilloscope. An output end of the fiber coupler is connected with to spectrometer, an inner wall of the integrating sphere is coated with a diffuse reflection coating, and at the same time, a diffuse reflection plate is arranged on the inner wall of the integrating sphere. A micro DC motor is mounted outside an integrating sphere shell, and a rotor of the micro DC motor passes through the integrating sphere shell to connect the diffuse reflection plate. When the system is applied, the energy parameters, time parameters and spectral parameters of the laser can be measured synchronously, the laser speckle can be effectively suppressed, the parameter measurement accuracy can be improved, and the manufacturing cost can be reduced.
Owner:合肥中科九衡科技有限公司
Laser light source for laser projector
ActiveCN105182674BCoherence length reductionSpeckle suppressionProjectorsOptical elementsBeam splitterPhase difference
The invention discloses a laser light source special for a laser projector. The laser light source comprises a laser emitting part (1-3) and a feedback interference system, wherein the feedback interference system comprises a phase modulator (5), a polarizing beam splitter (6) and a reflecting mirror (7) which are arranged along the light path in turn; the laser beam emitted from the laser emitting part (1-3) is a linearly polarized light which enters into the phase modulator (5); the phase difference is generated for the phases of a P polarized light component and an S polarized light component in the laser beam by the phase modulator (5), so that the polarization state of the laser beam is changed; the laser beam outputted from the phase modulator (5) enters into the polarizing beam splitter (6); the P polarized light component of the laser beam is transmitted to the reflecting mirror (7) by the polarizing beam splitter (6) and is reflected to the polarizing beam splitter (6) by the reflecting mirror (7); after the P polarized light component is transmitted, the P polarized light component returns to the laser emitting part (1-3) through the phase modulator (5); the S polarized light component of the laser beam is reflected by the polarizing beam splitter (6).
Owner:SINOLASER PROJECTION TECH
Systems and methods for producing nanostructures over large areas
ActiveCN103403621BEasy to manufactureSpeckle suppressionPhotomechanical exposure apparatusPhotosensitive material processingNanostructureTransmitted light
A method and an apparatus print a pattern of periodic features into a photosensitive layer. The methods includes the steps of: providing a substrate bearing the layer, providing a mask, arranging the substrate such that the mask has a tilt angle with respect to the substrate in a first plane orthogonal thereto, and providing collimated light for illuminating the mask pattern so as to generate a transmitted light-field composed of a range of transversal intensity distributions between Talbot planes separated by a Talbot distance so that the transmitted light-field has an intensity envelope in the first plane. The mask is illuminated with the light while displacing the substrate relative to the mask in a direction parallel to the first plane and to the substrate. The tilt angle and the intensity envelope are arranged so that the layer is exposed to an average of the range of transversal intensity distributions.
Owner:EULITHA
Projection screen and ultra-short-throw projection system having the same
ActiveCN106125492BIncrease the separation distanceReduce contrastProjectorsProjection screenIsolation layer
The invention discloses a projection screen and an ultra-short-focus projection system. The projection screen receives image light beams emitted by a projection device, and comprises a reflecting layer, a lens layer, an isolation layer and a scattering layer, wherein the isolation layer is arranged between the scattering layer and the lens layer; the image light beams pass through the scattering layer, the isolation layer and the lens layer in sequence and reach the reflecting layer after being emitted from the projection device; and after being reflected by the reflecting layer, the image light beams pass through the lens layer, the isolation layer and the scattering layer again and then, enter the human eyes. The ultra-short-focus projection system comprises the ultra-short-focus projection device and the projection screen. Laser generated by the ultra-short-focus projection device is projected onto the projection screen to form an image on the projection screen. The projection screen and the ultra-short-focus projection system can obviously reduce speckles of the projection screen.
Owner:QINGDAO HISENSE LASER DISPLAY CO LTD
Four-rectangular-window-based spatial domain filtering method
InactiveCN106447628ASpeckle suppressionMaintain edge structure informationImage enhancementAlgorithmComputer graphics (images)
The invention provides a four-rectangular-window-based spatial domain filtering method. The method comprises the steps of reading an image of a coherent speckle multiplicative noise; setting the length and width of each rectangular window in four rectangular windows and the spacing between the two windows, wherein the four rectangular windows include a first rectangular window, a second rectangular window, a third rectangular window and a fourth rectangular window; rotating the four rectangular windows around a central point of a local area window in spatial domain filtering, and determining edge intensity mapping corresponding to pixel points in the local area window according to a mean value in each rectangular window in the four rectangular windows; calculating weight values of the pixel points except the central point in the local area window for the central point according to the edge intensity mapping; and determining estimated pixel point values of the local area window according to the weight values. According to the method, coherent speckles can be suppressed and the edge structure information is also kept.
Owner:DALIAN MARITIME UNIVERSITY
Chaos-modulated speckle-free laser projector
ActiveCN109683340BNo coherenceImprove the projection effectProjectorsOptical elementsLaser arrayHemt circuits
The invention discloses a chaotic modulation speckle-free laser projector, which includes several groups of laser arrays, laser array driving devices, laser output parts and projection units, each group of laser arrays is composed of a plurality of same-color lasers; each group of laser arrays is followed by There are respective converging lenses and collimating lenses arranged along the respective optical paths, and laser output parts and projection units are arranged behind all the collimating lenses; the laser array driving device includes a chaotic electric signal generating device and a laser driving circuit, and the chaotic electric signal The output end of the generating device is connected to the input end of the broadband amplifier, the output of the broadband amplifier is to the bias device, the output of the laser driving circuit is to the bias device, and the bias device drives each group of multiple laser arrays through a line with a delay greater than 0.3 ns or greater than 6 cm. A laser glows. The invention ensures the full power output of the laser, not only suppresses the speckles of the laser, but also makes the projection effect of the projector better.
Owner:TAIYUAN UNIV OF TECH
A laser light source system and display device
ActiveCN106384935BSpeckle suppressionSimple structureSemiconductor laser arrangementsLaser arrangementsLaser technologyDisplay device
The invention relates to the semiconductor laser technology field and especially relates to a laser light source system and a display apparatus. A laser, a heat sink and a uniform light device are included. The laser comprises N laser chips and the N is an integer which is greater than or equal to 1. The N laser chips are arranged on the heat sink. In the heat sink, thermal conductivities of positions where at least two laser chips are located are different so that the laser chips at different positions possess a temperature difference and wavelengths of output light of the laser chips are changed. Laser beams emitted by the N laser chips are entered into the uniform light device. Through the uniform light device, the laser beams with different wavelength are superposed and finally laser beams which are uniformly distributed are acquired so that laser coherence is reduced and laser speckles are effectively restrained. The structure of the laser light source system is simple, cost is low and the system is easy to realize.
Owner:QINGDAO HISENSE LASER DISPLAY CO LTD
Laser speckle suppression element and suppression method
ActiveCN111061062BSpeckle suppressionSpeckle effectiveProjectorsOptical elementsOphthalmologyImage resolution
The present application discloses a laser speckle suppressing element and a suppressing method, which are used to improve the efficiency of speckle suppression and enhance the effect of speckle suppression. The element adopts a light-transmitting material; it includes an array composed of a plurality of light-transmitting regions; wherein, the lateral size of the light-transmitting regions is smaller than the spatial resolution of the human eye, and the difference in the longitudinal dimensions of adjacent light-transmitting regions makes the transmission of adjacent light-transmitting regions The optical path difference of the laser beams in the light area is not less than the coherence length of the laser beams. In this way, the time coherence between adjacent sub-laser beams can be destroyed, and the spatial coherence of the laser can be destroyed, so that adjacent sub-laser beams become The non-correlated light is obtained, so that the spatial superposition of multiple independent speckles can be realized within the resolution of the human eye, and the effective suppression of speckle can be realized.
Owner:SHANXI UNIV
A radar image speckle noise suppression method based on correlation loss convolutional neural network
ActiveCN108629746BLimit speckle suppression performanceSpeckle suppressionImage enhancementImage analysisCorrelation coefficientComputer vision
Owner:HUAZHONG UNIV OF SCI & TECH
A Spatial Filtering Method Based on Four Rectangular Windows
InactiveCN106447628BSpeckle suppressionMaintain edge structure informationImage enhancementEdge structureComputational physics
The invention provides a spatial filtering method based on four rectangular windows, which includes: reading the image of coherent patch multiplicative noise; setting the length, width and spacing between the two windows of each rectangular window in the four rectangular windows. The four rectangular windows include a first rectangular window, a second rectangular window, a third rectangular window and a fourth rectangular window; the four rectangular windows rotate around the center point of the local window in spatial filtering, and according to the The mean value in each rectangular window determines the edge intensity mapping corresponding to the pixels in the local window; calculates the edge intensity mapping of the pixels in the local window except the center point to the center point based on the edge intensity mapping. Weight value; determine the estimated pixel value of the local window according to the weight value. The invention can suppress coherence spots while maintaining edge structure information.
Owner:DALIAN MARITIME UNIVERSITY
A Static Laser Speckle Suppression Method Combining Multimode Optical Waveguides and Diffractive Optical Devices
ActiveCN109656029BSpeckle suppressionAchieve Laser Speckle SuppressionOptical devices for laserOptical elementsDiffraction orderProjection screen
The invention provides a static laser speckle reduction method combining a multimode optical waveguide and a diffractive optical device. The method comprises the following steps that Step 1, a laser beam is collimated and then input into the diffractive optical device, the diffractive optical device outputs the incident collimated laser beam as diffraction beams with different diffraction orders;Step 2, the diffraction beams with the different diffraction orders are focused by a lens, the focused beams are input into the multimode optical waveguide, the multimode optical waveguide modulates the transmission delay of different diffracted beams, so that the diffraction beams of all diffraction orders are output from the multimode optical waveguide at the delay difference delta T; Step 3, the diffraction beams output at different delays are collected by an imaging lens and imaged on a projection screen, the projection screen is provided with a rough surface, an image on the projection screen is received and processed by a digital camera, and the static laser speckle suppression is achieved. The static laser speckle reduction method combining the multimode optical waveguide and the diffractive optical device has the advantages that the reliability is high, electric energy supply is not needed, the response time is short, no mechanical running mechanism is needed, the system is simple, the size is small, and the cost is low.
Owner:ZHEJIANG UNIV OF TECH
Illumination device, projection type image display device, and optical device
ActiveUS9052524B2Speckle suppressionTelevision system detailsProjectorsTemporal changeImage formation
Owner:DAI NIPPON PRINTING CO LTD
A laser light source device, projection system and control method thereof
ActiveCN111142325BDestroy temporal coherenceShorten the timeProjectorsOptical elementsLight spotControl signal
Owner:QINGDAO HISENSE LASER DISPLAY CO LTD
Speckle suppression device based on frustrated total internal reflection light splitting
PendingCN113900267ADestroy laser coherenceSpeckle suppressionMountingsThin membraneTotal internal reflection
The invention provides a speckle suppression device based on frustrated total internal reflection light splitting. The speckle suppression device comprises a first glass substrate, a patterned nano film, a bonding layer, a spacer, a second glass substrate and a Dove prism. A beam of laser enters the speckle suppression device through the Dove prism, is transmitted for multiple times through the first glass substrate and the bonding layer and is totally reflected for multiple times through the second glass substrate, a frustrated total internal reflection phenomenon occurs on the patterned nano-film, and finally a group of incoherent emergent laser beams with the same light intensity are formed, and the purposes of destroying laser coherence and inhibiting speckles are achieved. Compared with the prior art, the speckle suppression device provided by the invention has the advantages of zero power consumption, static state, small size and the like.
Owner:SHANXI UNIV
Holographic Micro Imaging Device
ActiveCN110989313BAddress toxicitySuppression of background scatterMicroscopesHolographic imagingSomatic cell
A device for realizing holographic microscopic imaging, the device includes an inverted microscope and a holographic imaging device, wherein: the inverted microscope has an optical path entrance and an optical path exit, and the object to be observed is illuminated by a linearly polarized laser bright field, carrying the information of the object to be observed The light enters the inverted microscope through the optical path entrance, and the magnified holographic image of the object is obtained in the inverted microscope. The optical path exit of the inverted microscope is connected with the optical path entrance of the holographic imaging device; The transverse modes and polarization of the field are coupled and compounded for measurement. The quantitative phase imaging implementation device proposed by the present invention uses an imaging method of non-labeled specimens, which does not cause photobleaching of molecular structures due to light absorption caused by fluorescence imaging, overcomes the toxicity of excitation light to biological cells, and makes the present invention applicable to Watch the evolution of living cells.
Owner:UNIV OF SCI & TECH OF CHINA
High-stability uniform integrating sphere brightness source system based on galvanometer
The invention relates to a galvanometer-based high-stability uniform integrating sphere brightness source system, which comprises a laser, a diaphragm, a polarizer, a power stabilizer, a galvanometer and an integrating sphere which are sequentially arranged, and is characterized in that the galvanometer is connected with a signal generator; the laser is used for emitting laser; the diaphragm is used for adjusting the beam size; the polarizer is used for adjusting the polarization direction of the light beam, so that the polarization direction of the light beam is matched with the power stabilizer; the power stabilizer is used for stabilizing the light beam; the signal generator is used for sending a variable control signal to the galvanometer, so that the galvanometer forms a variable light field; the integrating sphere is provided with a light beam inlet and a light beam outlet, the light beam inlet and the light beam outlet are located on the same straight line, the light beam outlet of the integrating sphere is provided with a radiance meter, the radiance meter is placed on an electric translation table, the light beam outlet of the integrating sphere is provided with a monitoring detector, and the monitoring detector is connected with a voltmeter. The system is advantaged in that the galvanometer and the integrating sphere are combined, so speckles can be effectively inhibited, and stability and uniformity are good.
Owner:NAT INST OF METROLOGY CHINA
Optically Adhesive Polyester Film
ActiveCN102438831BMachinability inhibitionSpeckle suppressionNon-macromolecular adhesive additivesDiffusing elementsRefractive indexCarboxylic acid
Disclosed is a highly adhesive polyester film for optical use, wherein the formation of an iris-like color pattern under the light of a fluorescent lamp is suppressed. The highly adhesive polyester film for optical use has excellent adhesion to a hard coat layer, excellent adhesion under high temperature, high humidity conditions (wet heat resistance), and chipping resistance of a coating layer. Specifically disclosed is a highly adhesive polyester film for optical use, wherein a coating layer containing a polyester resin, particles A and particles B is provided on at least one surface of a polyester film. The polyester resin contains, as acid components, a naphthalene dicarboxylic acid and a dicarboxylic acid component represented by formula (1) and / or a diol component represented by formula (2); the particles A are metal oxide particles having a refractive index of not less than 1.7 but not more than 3.0; and the particles B have an average particle diameter of not less than 200 nm but not more than 700 nm. (1) HOOC-(CH2)n-COOH (In the formula, n represents an integer satisfying 4 = n = 10.) (2) HO-(CH2)n-OH (In the formula, n represents an integer satisfying 4 = n = 10.)
Owner:TOYOBO CO LTD
Laser speckle suppression element and suppression method
ActiveCN111061062ASpeckle suppressionSpeckle effectiveProjectorsOptical elementsImage resolutionOptical pathlength
The invention discloses a laser speckle suppression element and a suppression method, which are used for improving the speckle suppression efficiency and enhancing the speckle suppression effect. Theelement is made of a light-transmitting material and comprises an array formed by a plurality of light-transmitting areas; the transverse size of the light-transmitting area is smaller than the spatial resolution of human eyes; the difference value of the longitudinal sizes of the adjacent light-transmitting areas enables the optical path difference of the laser beams penetrating through the adjacent light-transmitting areas to be not smaller than the coherence length of the laser beams; thus, the time coherence between the adjacent sub laser beams can be destroyed, the spatial coherence of the laser can be destroyed, the adjacent sub laser beams become non-correlated light, spatial superposition of multiple independent speckles can be achieved within the resolution of human eyes, and effective inhibition of the speckles is achieved.
Owner:SHANXI UNIV
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