943 results about "Plane mirror" patented technology

The invention belongs to the technical field of optical detection, and particularly relates to a global power wave aberration prediction-based Ritchey-Common detection method and system, and the method comprises the steps: firstly building a three-dimensional optical model through the parameters of a standard spherical mirror, a to-be-detected plane mirror and an interferometer, and combining a preset Ritchey angle and an out-of-focus / astigmatism coefficient, injecting vibration and temperature noise by using Monte Carlo simulation to generate an enhanced training data space; secondly, constructing a phase error adjustment model based on an adversarial network, and decoupling a mapping relation between an adjustment error and wave aberration distortion through a multi-scale attention mechanism and a radial basis function network to realize adaptive correction of sub-aperture phase data; and finally, splicing sub-aperture phases by using a graph neural network and fusing multi-angle full-aperture measurement data to accurately reconstruct the surface shape of the plane mirror to be measured. According to the invention, through confrontation training and dynamic error compensation of physical constraints, the detection efficiency and reliability of the large-aperture optical element are significantly improved.

The invention relates to a design method of a star magnitude large dynamic range spectrum modulation system. The design method comprises the following steps: S1, adopting a cylindrical collimation beam expanding system, a star magnitude large dynamic range light splitting system and a DMD device; the star magnitude large dynamic range light splitting system is composed of a large dynamic light splitting optical system and an energy modulation optical system. The star isometric large dynamic light splitting optical system is composed of a steering reflecting mirror, a grating and an imaging reflecting mirror. The energy modulation optical system is composed of a steering mirror, a grating and a plane mirror. S2, selecting a DMD device and a grating; and S3, carrying out optimization design on the cylindrical collimation beam expanding system and the star magnitude large dynamic range beam splitting system. According to the invention, the cylindrical collimation and beam expanding system is adopted to replace a physical slit and a collimating mirror in the Czerny-Turner type plane diffraction grating optical structure, so that the imaging quality of the large-dynamic-range spectrum modulation optical system can be improved; and the problem of contradiction between the slit and the imaging quality in the initial structure can be solved.

The invention discloses a vehicle-mounted VR back-row entertainment method, and relates to the field of VR, and the method comprises the steps: processing image data transmitted by a controller through a DCT plate negative reflection plate lens, and generating aerial imaging data; reflecting a virtual image corresponding to the aerial imaging data by using a plane mirror to generate real image data; performing voice recognition processing on the input voice of the user to obtain voice control instruction data; acquiring image data of user gestures through an infrared sensor, and performing image recognition to obtain gesture control instruction data; generating interaction control data according to the three-dimensional coordinates in the real image data, the voice control instruction and the gesture control instruction; aiming at low image imaging precision in a vehicle-mounted VR entertainment system in the prior art, high-quality aerial imaging is generated by using a DCT plate negative reflection plate lens and a plane mirror, multi-modal interaction and the like are realized by adopting voice recognition and gesture recognition, and a vivid imaging effect is provided.

The invention discloses a swing scanning type laser panoramic three-dimensional scanning device based on a high-precision rotary table and a panoramic measurement method, the swing scanning type laser panoramic three-dimensional scanning device based on the rotary table is used for realizing laser scanning, and a camera only collects line contour information of one surface area every time; the problem of plane mirror light path crosstalk formed in different ROI regions is effectively avoided. Line laser can be projected to the plane mirror at any angle, slight front-and-back pitching of the plane mirror does not affect the measurement result, the installation requirement is low, and the device has the advantages of higher spatial resolution, high precision, large scanning range, high measurement scene applicability, high measurement efficiency and wide application range. Compared with a conventional linear scanning mode, the swing scanning type laser scanning device has the advantage of higher information acquisition speed, and when a sample with a large size is reconstructed under a large working distance, the information acquisition efficiency based on the swing scanning type laser scanning mode is far higher than that of translation scanning.

The invention discloses a mirror symmetry correlation receiving radiation metasurface and a polarization and complex amplitude regulation and control method thereof. The polarization state of the receiving and radiating end of the metasurface and the complex amplitude regulation and control method from any polarized wave to any polarized wave are regulated and controlled by controlling the in-plane mirror symmetry of the receiving and radiating metasurface patch structure. The polarization and complex amplitude regulation and control method is realized by a receiving and radiating metasurface, the metasurface structure is composed of five layers of metal and four layers of dielectric substrates, and the total thickness is about 0.086 lambda. Wherein the first-layer structure and the fifth-layer structure consist of circular rings with two pairs of arc-shaped grooves etched at the edges and C-shaped grooves etched at the centers; the relative rotation angle of the C-shaped groove and the arc-shaped groove is changed to control the elliptical angle of electromagnetic waves, the overall rotation angle of the C-shaped groove and the arc-shaped groove controls the polarization angle of the electromagnetic waves, and the opening size of the C-shaped groove is used for regulating the transmission amplitude; the transmission phase is regulated by changing the length of the third-layer transmission line; meanwhile, the four layers of dielectric plates are used for isolating radiation and receiving modes. The metasurface and the method have the ultra-thin characteristic and the ultra-high pixel resolution.

The invention discloses an optical test system and method for measuring the total temperature of a supersonic combustion flow field, and relates to the field of combustion flow field measurement. The system comprises supersonic combustion incoming flow, a time sequence synchronizer, a first laser, a first focusing lens, a first total reflection plane mirror, a second laser, a second focusing lens, a sheet light lens, a second total reflection plane mirror, a computer, an ICCD, a tunable laser diode, a laser controller, a photoelectric detector, an industrial personal computer and a signal monitor. On the basis of a non-contact optical testing technology, the local total temperature is obtained by measuring the speed and the static temperature of the combustion flow field at the same time on the premise that the flow structure and the combustion state of the combustion flow field are not damaged, the structure of the supersonic combustion flow field is not obviously affected, unnecessary oblique shock waves are not caused, and the measurement accuracy is high. And the local and downstream flow and combustion states of the tested combustion flow field are not influenced.

The invention discloses a surface shape error self-calibration splicing detection method and system for an X-ray plane mirror, and the method comprises the steps: enabling the value of an additional error source to be zero based on an environment disturbance error and other fixed settings, and carrying out the multi-factor and multi-level self-calibration splicing measurement simulation of measurement parameters, so as to obtain optimized measurement parameters and errors; carrying out single-factor multi-level self-calibration splicing measurement simulation on each additional error source based on the optimized measurement parameters to obtain errors caused by each additional error source; calculating an error control level required by each additional error source; carrying out self-calibration splicing measurement simulation according to the optimized measurement parameters and the error control level of each additional error source, and exiting if the measurement error obtained by simulation meets the precision requirement; otherwise, more strict measurement parameters and additional error source control levels are selected, and iteration is continued until the precision meets the requirement. The invention aims to determine the error control level and the main test parameters required by the main error source of the X-ray plane mirror.

The utility model discloses an auxiliary cavity adjusting device for a laser gyroscope, which comprises a He-Ne laser, a collimation laser, an adjustable first reflecting mirror, a semi-transparent semi-reflecting mirror, a second reflecting mirror, a third reflecting mirror, an imaging mechanism and a light beam coincidence verification structure, and is characterized in that the collimation laser is arranged on the right side of a cavity to be adjusted and corresponds to a left upper plane mirror of the cavity to be adjusted; the first reflecting mirror and the third reflecting mirror are located between the cavity to be adjusted and the collimating laser, the semi-transparent and semi-reflecting mirror is located between the second reflecting mirror and the He-Ne laser, the light beam coincidence verification structure is movably located between the semi-transparent and semi-reflecting mirror and the second reflecting mirror, the He-Ne laser is located right above the collimating laser, and the He-Ne laser is located right above the collimating laser. The semi-transparent semi-reflecting mirror is located over the first reflecting mirror, the second reflecting mirror is located over the third reflecting mirror, and the imaging mechanism is located on the right side of the cavity to be adjusted and corresponds to a left lower plane mirror of the cavity to be adjusted. According to the utility model, the cavity adjusting efficiency and accuracy of the laser gyroscope can be improved.

The invention discloses an optical probe of a closed space lithium battery thermal runaway gas real-time spectrum monitoring system, and the optical probe comprises a laser, Raman scattering light emitted by the laser is emitted in parallel through a collimating mirror, enters a narrow band filter, is reflected by a plane mirror, enters a dichroscope for refraction, and is reflected by a light source. The target detection objective lens gathers on a detected target; raman scattering light returned by the detected target passes through an objective lens target detector and a dichroscope, is modulated by a long-wave-pass optical filter, and is converged into an optical fiber receiving end through a Raman scattering light collecting mirror to enter a spectrograph system. The Raman spectrum technology is applied to monitoring gas component changes in the electrochemical reaction process when the lithium battery is charged and discharged in the closed space, and the lithium battery thermal runaway real-time monitoring based on the Raman spectrum technology can provide a guarantee for the thermal runaway risk in the transportation and storage process of the lithium battery.

The invention relates to the technical field of optical design, and particularly provides an optical system polarization aberration compensation method, computer equipment and a storage medium, at least one plane mirror is additionally arranged in a to-be-compensated optical system, the plane mirror is arranged in front of an image plane of the optical system, and the spatial attitude of each plane mirror is used as a free variable to compensate the polarization aberration of the optical system. In the optional range of the spatial attitudes of the plane mirrors, the spatial attitude of each plane mirror is adjusted, and the compensated polarization aberration of the optical system meets the preset requirement by optimizing the spatial attitude of the iterative plane mirrors, so that the polarization aberration of the optical system can be compensated on the premise of not changing the wave aberration of the optical system and not occupying the degree of freedom of design. And the polarization aberration of the optical system is greatly reduced.

The invention relates to a pulse compressor, in particular to a pulse compressor convenient to adjust, which comprises a collimating lens, a first plane reflecting mirror, a first diffraction grating, an angle reflecting mirror, a high-low mirror and a second plane reflecting mirror, the first plane mirror is fixedly installed on the precision rotating table, and the angle mirror is fixedly installed on the precision displacement table. According to the technical scheme provided by the invention, the defects in the prior art that different pulse width compression amounts are inconvenient to obtain by changing the relative interval of the grating and adjusting the introduced negative dispersion value through the diffraction angle of the grating, and collimation adjustment of the incident light is inconvenient can be effectively overcome.

The invention relates to the field of optical detection, in particular to an interference confocal measurement system based on space coding and a measurement method thereof.White light generated by a light source is collimated through a first collimating lens and then divided into S polarized light and P polarized light through a polarization splitting prism, the S polarized light enters a reference plane mirror through a first quarter-wave plate, and the P polarized light enters a second quarter-wave plate; p polarized light enters a blazed grating through a second quarter-wave plate for transverse dispersion and then is changed into monochromatic polarized light with different wavelengths and the same focal length through a first achromatic lens, and the monochromatic polarized light and the monochromatic polarized light are jointly focused at the same depth position of an object to be measured. Information of the object to be measured is carried and returned to the polarization splitting prism, two beams of polarized light are combined and then focused on a target surface of a photoelectric detector of an imaging spectrometer with a mask plate through a focusing lens, an interference image of the object to be measured is obtained, and spectrum and interference analysis is carried out. According to the invention, the transverse scanning speed can be improved, the measurement time can be shortened, and the resolution can be improved.

The invention relates to a Kuder optical path correction method based on laser emission. Firstly, a plane mirror 19 is used for calibrating the installation position of an auto-collimation observation mirror 2 on a laser emission fixing bin 1; replacing a plane mirror 19 with a standard pentaprism 5, and calibrating the arrangement position of the optical theodolite 4 by using the standard pentaprism 5; replacing the standard pentaprism 5 with a Kuder mirror I 11, and determining the mounting position of the Kuder mirror I 11 by using the auto-collimation observation mirror 2 and the optical theodolite 4; and finally, a servo stable rotary table azimuth frame 10 and a servo stable rotary table pitching frame 7 are sequentially mounted on the laser emission fixing bin 1, and an azimuth axis and a pitching axis of the Kuder optical path are respectively corrected by using a laser 8 and a front lens 6. The method has the advantages of simplicity in operation, high correction efficiency, high field adaptability, convenience in equipment disassembly and assembly and the like, the Kuder optical path can be simply and quickly corrected, the optical path deviation is effectively eliminated, and the accuracy and the reliability of optical measurement are improved.

The utility model provides a scanning module and a scanning laser radar, and relates to the technical field of laser radars. The scanning module comprises a refracting optical element, the refracting optical element has a preset incident direction and a preset refracting direction, the refracting optical element comprises a plane mirror, the plane mirror has an emergent surface, the emergent surface is provided with a metasurface, and a refracting layer is formed on the metasurface; or, a microprism array is distributed on the emergent surface, and the microprism array is limited to form a refraction layer; wherein the refraction layer is used for refracting a light beam incident along a preset incident direction, so that the light beam is emitted along a preset refraction direction. According to the invention, by improving the scanning module of the laser radar, the stability of the scanning module can be improved, and a large pitching field angle can be scanned.

The invention belongs to the field of solar photovoltaics, and provides a CCLFR concentrating solar photovoltaic system and power generation equipment. The CCLFR concentrating solar photovoltaic system comprises a CCLFR concentrator, a supporting structure and PV assemblies which are arranged from bottom to top, wherein the PV assemblies are symmetrical left and right; the CCLFR condenser is of an axisymmetric structure and is a condensing mirror field formed by alternately arranging a plurality of plane mirrors; each plane mirror is used for reflecting incident light to the surface of the corresponding PV assembly; wherein the layout of each plane mirror is related to the width of the battery, the placement height of the photovoltaic battery, the inclination angle of the photovoltaic battery, the inclination angle of the mirror surface, the X-axis coordinate value of the mirror surface end point, the included angle between the reflection light of the mirror surface end point and the X axis, the width of the mirror surface, the width of the mirror field and the transverse distance between two adjacent mirror surfaces.

The invention belongs to the field of optical detection, and particularly relates to a synchronous calibration method for a geometric pose and an optical axis error of a reflective phase deflection system, which comprises the following steps of: taking a plane mirror pose as a reference, establishing redundant geometric constraints under a plurality of poses through mirror image reflection, and jointly solving geometric external parameters of the system; and meanwhile, a reverse ray tracing model and a normal integral model are synchronously constructed in a calibration stage, surface shape data are actually measured by combining an interferometer, a system optical axis error field is explicitly stripped, and decoupling separation of a system structure error and a surface shape error is realized. According to the method, the system building process is greatly simplified, the dependence of a high-precision mechanical auxiliary device is avoided, and the overall detection precision and the low-frequency error control capability of the reflective phase deflection system are effectively improved by synchronously modeling and compensating the optical axis error of the system in the calibration stage; and a technical basis with engineering adaptability is provided for high-precision free-form surface optical detection.

The invention provides a phase difference coherent Fourier scattering surface particle detection device and method, belongs to the technical field of flexible substrate surface particle detection, and solves the problem of low nano-scale particle detection sensitivity under the condition of low illumination power of a visible light band. The detection device comprises a laser, a collimating lens, a first diaphragm, a polarization state modulation module, a first beam splitter prism, a plane mirror, a piezoelectric actuator, an infinite correction microscope objective, a sample, a three-dimensional piezoelectric scanning table, a two-dimensional coarse adjustment displacement table, a second beam splitter prism, a tube lens, a camera, a wide-field illumination light source, a second diaphragm, a first lens, a third diaphragm and a second lens. The system comprises a two-quadrant photoelectric detector, a weak signal amplification circuit, a data acquisition module and a computer control system.

The invention discloses a transparent glass surface shape measuring device and a transparent glass surface shape measuring method based on stereoscopic deflection, a plane mirror is introduced to complete calibration work, global system parameters are optimized according to re-projection results of the plane mirror, system calibration flexibility is improved, and calibration precision is improved. Glass to be detected can be placed at any position in a to-be-detected area on a carrying platform without fixing, a Gray code auxiliary line shift fringe technology is adopted as a coding and unfolding scheme, the coding scheme is completely based on a binary coding method, a modulation graph has the characteristic of spatial separation, coding information is easier to extract, and the coding efficiency is improved. The reflection information of the upper surface of the glass is extracted through a self-adaptive method based on a clustering algorithm, threshold parameters do not need to be set manually, a pure vision scheme is adopted, the method has the advantages of being low in cost, large in dynamic measurement range and the like, and the measurement precision meets the actual industrial measurement requirement.

The invention provides a gas refractive index measuring device and method based on a Michelson interferometer, based on the Michelson interference principle, one interference arm of the Michelson interferometer is closed to serve as a gas chamber, and a plane mirror at the tail end is replaced by a grating; when the refractive index of gas in the cavity changes, the diffraction emergence angle of the grating and the propagation optical path of light in the cavity can change, an interferogram is changed, the refractive index can be calculated through inversion of the fringe number of interference fringes or the change of interference phases, and the structure is simple, convenient and rapid.

The invention discloses a focal length high-precision detection device and method for a long-focal-length optical system. The problems that an existing focal length detection method is low in detection repetition precision, poor in precision and not suitable for the long-focal-length optical system are solved. According to the invention, a light spot of light returned by an optical system is focused on a detector with clear imaging by using a beam splitter prism to replace a conventional detection method for observing and aiming a Perot plate image, adjusting the deflection angle of a plane mirror, and respectively recording the movement position of the light spot and the deflection angle of the plane mirror; subsequently, the movement amount of the light spot is accurately calculated through image processing, and then the focal length of the optical system is calculated.

The invention relates to an installation structure and a precision adjustment method of a long-distance laser target tracking and ranging light path, which are used for high-precision adjustment of a laser emission direction of a space target tracking and ranging light path. And the deviation between the emergent direction of the laser reflected by the three reflectors and the swing angle of the rotary table is minimum. The method comprises the following steps: firstly, leading a pitch axis and an azimuth axis to a plane mirror by using an autocollimator; secondly, a second reflecting mirror and a first reflecting mirror are installed and adjusted through the installation mode of a cushion column and a fastening screw, the grinding amount of the cushion column is calculated according to the back image motion track of an autocollimator or the motion track of a laser imaging point in a measurement camera, the cushion column is ground on the basis, and the purpose of high-precision installation and adjustment is achieved; thirdly, through zero calibration of a visible light camera, a measurement camera and a corner reflector, an adjustment system of a third reflector is built, and adjustment of the third reflector is achieved; finally, the cushion columns and the fastening screws are reinforced through epoxy glue, and the mechanical resistance of the light path is guaranteed.

The invention relates to the technical field of laser, and provides a high-power pulse width repetition frequency tunable laser, which comprises an input and output light path configured to input seed light and output amplified laser; a regenerative amplifier optical path configured to amplify the input seed light; and the pulse width compression module is configured to perform pulse width compression on the amplified seed light and output high-power pulse laser with tunable pulse width, and the pulse width compression module comprises a third polarizing beam splitter, a third 1 / 2 wave plate, a first electric control transverse movement plane mirror, a second electric control transverse movement plane mirror, a nonlinear crystal and a fourth plane mirror. On the basis of a nonlinear crystal multi-pass compression method, a high-power disc laser is built, pulse width compression is carried out on an annular cavity which contains a nonlinear crystal and a 1 / 2 wave plate or is added into a Pockels cell, and a high-power pulse width repetition frequency tunable pulse string is finally obtained by transversely moving a plane mirror through electric control.

The invention discloses a preparation method of a gallium nitride-based resonant cavity light-emitting diode and a product of the gallium nitride-based resonant cavity light-emitting diode. The method sequentially comprises the following steps: epitaxially growing a gallium nitride-based epitaxial layer on an original substrate, and preparing a plurality of curved surface structures on one surface of the gallium nitride-based epitaxial layer; sequentially depositing a current expansion layer, a curved surface reflector and a transition layer on the curved surface structure along a first direction, and preparing a regional metal substrate corresponding to the size of the transition layer on the surface of the transition layer of each curved surface structure; placing one side of the regional metal substrate on a temporary substrate, removing the original substrate, and polishing, thinning and planarizing the other surface of the gallium nitride-based epitaxial layer; depositing a plane mirror on the other surface of the gallium nitride-based epitaxial layer, and preparing an electrode; and removing the temporary substrate to obtain the single independent gallium nitride-based resonant cavity light-emitting diode. According to the invention, metal curled edges and side wall damages during obtaining of an independent device can be improved, an experimental process is optimized, and performances of light output power and the like of the device are improved.

The invention relates to a hundred-milliwatt high-power high-repetition-frequency terahertz strong source generating device at room temperature, belongs to the technical field of nonlinear optical frequency conversion, and solves the problems that the terahertz conversion rate is low and additional cooling equipment is needed in the prior art. The beam expanding lens group is used for carrying out light spot beam expanding on the femtosecond pumping laser until the diameter of a light spot is twice of the original diameter; the plane mirror group is used for guiding the pump laser after beam expansion; the first half-wave plate, the reflective diffraction grating, the gold reflector and the third ultrafast reflector are used for adjusting polarization and diffraction reflection; the 4-f telescope imaging lens group is used for reducing the spot diameter of the received pump laser and imaging the pump laser to the lithium niobate crystal; the lithium niobate crystal generates terahertz pulse radiation in the direction perpendicular to the wavefront; the terahertz collection module receives and focuses the terahertz pulse radiation; and the measuring device is used for receiving the focused terahertz pulse radiation for measurement.

The invention discloses a laser vibration meter series reciprocating type optical frequency modulation calibration method and device, and belongs to the field of photoelectric measurement. The calibration device is mainly composed of a calibrated laser vibration meter, a first acousto-optic modulator, a second acousto-optic modulator, a lens, a first sinusoidal signal source, a second sinusoidal signal source, an FM signal source and a plane mirror. Aiming at a laser signal emitted by the laser vibration meter, the reversibility characteristic of a light path is utilized, a straight-line-shaped light path structure is used, a secondary light frequency modulation mode of the same group of optical devices is combined with secondary light frequency translation to realize output frequency translation and modulation control of the laser vibration meter, and a laser Doppler effect caused by different vibration waveform magnitude values is simulated. And the modulated laser is completely returned to the calibrated laser vibration meter in the original path, so that the change waveform of the vibration velocity value is replaced by the change waveform of the frequency value, and the calibration of the laser vibration meter is realized. The device has the advantages of portability, wide frequency range, wide amplitude range calibration, high precision and good stability.

The invention relates to a prism type heterodyne spectrometer with a fixed localization plane, and belongs to the technical field of spectrometers. The problem that the position of an interference fringe localization plane changes along with the wavelength in the prism type spatial heterodyne spectrum technology in the prior art is solved. The invention discloses a prism type heterodyne spectrometer with a fixed localization plane. The prism type heterodyne spectrometer comprises a beam splitting optical element, a first prism, a first reflection optical element, a first plane mirror, a first tuning rotating shaft, a second prism, a second reflection optical element, a second plane mirror, a second tuning rotating shaft, an imaging optical element and a first detector. According to the prism type heterodyne spectrometer with the fixed localized plane, spatial heterodyne is constructed in a form of a prism, a reflection optical element and a plane mirror, and the localized plane of interference fringes is fixed. And the working spectral range of the instrument can be enlarged by rotating the optical element, so that the spectrum can be tuned, and the position of the localized surface can still be kept unchanged.

The invention discloses an image rotation detection and image rotation elimination adjustment method applied to a laser communication optical system, belongs to the technical field of space laser communication, and solves the problem that the space layout compactness, link energy transmittance and the like of the laser communication system are influenced by adopting a traditional rotation elimination device such as a Dove prism and a K mirror. The positions and angles of the left side collimator and the right side collimator are respectively adjusted to realize coaxial and detection reference transmission; placing the detected laser communication system between the two collimators, and adjusting a rotary table pitch angle of the laser communication system to enable a telescope of the laser communication system to be respectively aligned with the two collimators; extracting and recording light spot centroid coordinates of laser emitted by the two light tubes focused on the area-array camera of the laser communication system; calculating to obtain an image rotation angle; and adjusting the angle of a plane mirror in the laser communication system and carrying out iterative detection until the image rotation angle is reduced to meet the design requirement, thereby completing the adjustment work of the image rotation of the pitch axis of the detected laser communication system.

The invention relates to the technical field of infrared temperature measurement, in particular to an infrared thermal imaging device for a wide temperature measurement range and a design method of the infrared thermal imaging device. The design method comprises the steps that an all-pass plane mirror with the average infrared spectrum transmittance being 1 is arranged between a front-end optical system and a rear-end infrared detector; establishing a linear relation among the average infrared spectrum transmittance, the radiation temperature and the response total gray scale; determining the lower limit temperature corresponding to the response gray lower limit and the upper limit temperature corresponding to the response gray upper limit of the all-pass plane mirror according to the linear relation; at least one attenuation plane mirror for an infrared spectrum is designed between the front-end optical system and the rear-end infrared detector; and taking the upper limit temperature corresponding to the all-pass plane mirror as the lower limit temperature corresponding to the attenuation plane mirror, and calculating the average infrared spectrum transmittance of the attenuation plane mirror and the upper limit temperature corresponding to the attenuation plane mirror according to the linear relation. According to the scheme, wide-range temperature measurement can be realized.

The invention discloses a blue-light semiconductor laser array dense spectrum beam combining device with a self-adaptive wavelength adjustment function, and belongs to the technical field of blue-light semiconductor laser. The device is characterized in that a first blue light array emits a wavelength-locked collimated laser beam; the first spectroscope splits the light beam to obtain a main light beam and an auxiliary light beam; the first polaroid adjusts the polarization state of the secondary light beam to be S polarization; the first transmission grating diffracts the S-polarized light beam, the S-polarized light beam is reflected by the first adjustable reflector and propagated along an original light path, after the S-polarized light beam passes through the first spectroscope, a transmission part is reflected by the first plane reflector and then passes through the first spectroscope, the transmission part enters the original light path to be modulated again, a reflection part and a main light beam are subjected to space beam combination, and target laser is output; the monitoring and adjusting system analyzes the wavelength and the laser quality of the target laser in real time, adjusts the angle of the first adjustable plane mirror according to the wavelength and the laser quality, and reflects the laser with the target wavelength. The effects of output beam quality improvement, laser volume compression and system reliability improvement are achieved.

The invention belongs to the technical field of optical adjustment of large-aperture telescopes, and particularly relates to a device and a method for in-situ measurement of optical axis errors of a large-aperture telescope in an external field. The method comprises the following steps: S1, roughly adjusting the four-dimensional adjusting base to enable the auto-collimation light pipe to be aligned with the center of a pitch axis of a to-be-measured piece; s2, rotating the pitch axis of the to-be-measured piece, and adjusting the angle inclination adjusting mechanism to enable the reflecting surface of the plane mirror to be perpendicular to the optical axis of the auto-collimation light pipe, and at the moment, enabling the optical axis of the auto-collimation light pipe to coincide with the pitch axis of the to-be-measured piece; s3, using the to-be-detected piece to track a natural star, when the natural star is located at the center of the detector target surface of the to-be-detected piece, rotating the rotatable pentaprism mechanism to enable the third window to be aligned with the natural star, and enabling the natural star to be imaged on the detector target surface of the auto-collimation light pipe and the detector target surface of the to-be-detected piece at the same time; and S4, calculating a visual axis error of the to-be-measured piece based on the imaging track of the natural star. According to the invention, the process can be simplified, the efficiency can be improved, and the large-aperture telescope optical axis difference can be measured in real time in an out-field on-site manner.