280 results about "Grism" patented technology

The invention belongs to the field of astronomical telescopes, and particularly relates to a large-aperture spliced telescope adjusting device and method, and the method comprises the steps: starting a light source module, providing a far-field illumination light beam for a spliced primary mirror, and carrying out the confocal adjustment of each sub-mirror through an adjusting mechanism according to the far-field illumination light beam; the light source switching module is used for providing a near-field illumination light beam for the spliced primary mirror, and the near-field illumination light beam is split into two separated sub light beams by the pyramid mirror after penetrating through a splicing seam of the spliced primary mirror; performing dispersion on all the sub-beams through a dispersion prism, and converging the dispersed sub-beams through an achromatic lens to form dispersion stripes; the phase difference of the dispersion fringes is extracted through the camera, and co-phase adjustment is carried out on the sub-mirrors through the adjusting mechanism according to the phase difference of the dispersion fringes. According to the invention, high-precision and high-flux spectral response calibration and co-phase detection of the large-aperture spliced telescope can be realized, so that reliable technical support is provided for construction and operation of a next-generation giant astronomical telescope.

The invention discloses an external cavity tunable laser linewidth compression system for realizing wavelength phase locking based on mutual injection of gain chips. The external cavity tunable laser linewidth compression system comprises a red light semiconductor laser main gain chip, a first collimation optical system, a blazed grating, a tuning rotating mirror, a reflector, a power supply driving system and a double-path feedback amplification system, the double-path feedback amplification system comprises a first secondary gain chip, a second secondary gain chip, a second collimation optical system, a third collimation optical system and a polarization-free beam splitter prism; and the red light semiconductor laser main gain chip, the first secondary gain chip and the second secondary gain chip are all connected with the power supply driving system. Therefore, the technical problems of low output infrared light power, poor stability and narrow mode-hopping-free tuning range in the prior art are solved, and high-power, narrow-linewidth, high-stability and large-range mode-hopping-free continuous tuning red light output can be realized.

The invention discloses a coaxial laser confocal processing and measurement integrated system and an in-situ morphology measurement method thereof, and belongs to the technical field of ultrafast laser precision processing and in-situ measurement. The system comprises a laser confocal morphology measurement module, an ultrafast laser scanning processing module, a CCD (Charge Coupled Device) microscopic imaging module, a beam splitter prism, a low-pass dichroscope, a long-working-distance achromatic laser processing objective lens and a combined three-axis precision displacement table, the laser confocal morphology measurement module generates a measurement light beam to realize morphology measurement of a sample; the ultrafast laser scanning processing module generates a processing light beam to scan and process the surface of the sample; the CCD microscopic imaging module generates an illumination light beam to realize illumination of a processing position and acquisition of image information of a sample surface; a measurement light beam, a processing light beam and an illumination light beam form coaxial light beams through a low-pass dichroscope, the coaxial light beams are focused at the same position of the surface of a sample through a long-working-distance achromatic laser processing objective lens, and the coaxial in-situ measurement condition is achieved.

The invention provides a spliced detector flatness large-flux in-situ detection method which comprises the following steps: a light source emits a light beam which is compressed by a cylindrical lens, then is dispersed by a dispersion prism and respectively enters the edges of two adjacent detectors, and the two light beams are reflected by the surfaces of the detectors and then converge to generate dispersion stripes; a fixed difference calibration mode is adopted to calibrate stripe slope singularity caused by edge stripe variation in the dispersion stripe forming process; a band elimination filter is used for generating band elimination of a specific wave band in the dispersion fringes, and the channel spectrum is tested by analyzing the characteristics of the band elimination; the edge position of each detector is finely adjusted by using a dispersion prism, and the edge position of each detector is adjusted through deviation of a pupil position in combination with multi-point light emitted from one side of a wide-angle optical system by using an optical fiber interconnection system. According to the invention, the confocal and co-phase adjustment speed and precision of the spliced detector are greatly improved, and the regulation and control requirements of extremely high information flux and rapid convergence of a large-aperture system are met.

The invention discloses a dual-wavelength polarization tuning interference spectrum frequency discrimination device and a synchronous frequency locking method, and the method specifically comprises the steps: enabling a polarization Michelson interferometer to divide incident laser into two beams of linearly polarized light through a plurality of achromatic wave plates and a polarization splitting prism, and enabling the two beams of linearly polarized light to form dual-wavelength circularly polarized light for output after the two beams of linearly polarized light are reflected and combined; the output light is divided into two beams after passing through a light splitting module, and the two beams are respectively collected and processed into a four-quadrant synchronous phase-shifting interferogram by a polarization camera after passing through an achromatic lens, and the wavefront phase difference is calculated in real time; the other beam is compensated by the rotary linear polarizer and then is received by the detector; through the corresponding relation between the wavefront phase difference and the rotation angle, the rotation linear polarizer is driven in real time to carry out phase compensation, so that polarization tuning and frequency locking are realized; meanwhile, a piezoelectric mirror bracket control signal is obtained through calculation, and interferometer parallelism error correction is carried out. According to the invention, synchronous real-time monitoring and active feedback locking of dual-wavelength interference signals can be realized, and the system has the advantages of high tuning resolution and accurate data.

The invention discloses a multi-angle X-ray imaging system based on a detachable scintillation screen, and belongs to the technical field of X-ray imaging. The system comprises a base, a first / second rotating seat, a scintillation screen assembly, an objective table, a prism assembly, a protection module and a control module, wherein the scintillation screen assembly supports rapid switching between a flexible scintillation screen and a non-flexible scintillation screen and has a multidirectional position adjusting function, and the objective table lifting mechanism and an adjusting structure of the prism assembly jointly guarantee that the centers of the X-ray source, the sample to be tested, the scintillation screen and the prism are coaxially aligned. The protection module constructs a full-dimension radiation protection and state early warning system through a lead housing, a lead glass observation window, a radiation detection module and a tricolor lamp, operation safety is effectively guaranteed, and the control module comprises a master control system and an external touch screen and can achieve parameter presetting, intelligent regulation and control and detection data storage. The system can flexibly switch a static three-dimensional imaging mode and a dynamic rotary imaging mode, and can adapt to regular and special-shaped sample detection; and by replacing the scintillation screen, the performance of different scintillation screens can be conveniently detected. The system is convenient to operate and high in safety, and meets the multi-angle X-ray imaging requirements in the fields of industrial quality inspection and scientific research.

The invention discloses a method for installing and adjusting a double-reading-head photoelectric encoder on a gyro accelerometer, which comprises the following steps of: initially installing a coded disc base and an optical component, measuring the size, adjusting a grating gap, reinstalling the optical component, installing the coded disc component, testing a signal, fastening the optical component and the coded disc component, installing a receiving plate and arranging a wire harness. The oscilloscope is used for observing sine and cosine signals and a zero position, the industrial personal computer is used for reading an angle value given by the signal processing and output circuit, the installation accuracy of the double-reading-head photoelectric encoder is judged, and the purpose that the double-reading-head photoelectric encoder is installed on the gyro accelerometer in a high-precision mode is achieved. The problem of high-precision installation of the double-reading-head photoelectric encoder in the limited space of the gyro accelerometer is solved, the installation and adjustment operation is simpler and more efficient, particularly, high-precision optical methods such as a multi-face prism and an autocollimator are not needed, and the method is more suitable for completing installation and adjustment or maintenance in off-line scenes such as a user site.

The invention discloses an image imaging method and system based on multi-spectral fusion and deep learning, and the system comprises a multi-spectral fusion imaging frame based on a visible light wave band under low illumination, a dual-optical-path imaging system based on a beam splitter prism, and a deep learning frame NVFNet fusing near-infrared light (NIR) and visible light (VIS) multi-spectral information. And a color correction model CCNet is designed for the false color of the image. According to the invention, the defect of low signal-to-noise ratio of a visible spectrum under extremely low illumination is made up by introducing an infrared spectrum with high permeability, meanwhile, a double-flow feature extraction module and a space-spectrum attention fusion strategy are designed, a network is guided to effectively extract, align and fuse cross-spectrum features, and detail reconstruction and color restoration of an imaging result are realized at the same time.

The invention provides a multi-mode visual touch fusion sensor of a non-coaxial light path, which realizes multi-mode cooperation of a visual mode and a visual touch mode by performing non-coaxial arrangement on the optical axis of a camera and the central normal of a touch plane on a structural level; a virtual binocular system is constructed under the condition of a single camera by means of a free-form surface light splitting biprism, the number of devices and the assembling freedom degree are reduced, and therefore the integration degree and calibration consistency are improved; a semi-transparent and semi-reflective optical element is matched with an LED light-emitting unit time sequence and a control circuit to realize automatic and rapid mode switching, so that the long-term reliability is improved, and the switching service life is prolonged; through the collaborative design of the self-assembled metal nano reflective coating and the thin polyurethane packaging layer, a high-contrast and wear-resistant deformation image is obtained on the premise of not sacrificing the tactile sensitivity, and finally continuous acquisition of a target pose and contact parameters is realized. And the comprehensive requirements of accurate grabbing and touch closed-loop control on stable imaging, rapid switching, easy integration and high reliability are met.

The first aspect of this invention provides a polarized illumination system for providing illumination light to biological tissue, comprising at least one laser, a lens, and a polarization-maintaining fiber. The second aspect provides a polarized imaging system for receiving light reflected or scattered by biological tissue after illumination, comprising an analyzer, an imaging lens, and a photosensitive device. The third aspect provides another polarized imaging system, comprising an imaging lens, a polarizing beam splitter, and a photosensitive device. The fourth aspect provides an endoscope system comprising the aforementioned polarized illumination system and polarized imaging system. This invention utilizes the different depolarization characteristics of scattered light at different depths to achieve separate imaging of specular reflection light, surface scattered light, and deep scattered light, greatly improving the visibility of mucosal surface and deep mucosal information, and significantly enhancing the visibility of various mucosal lesions.

The application provides a satellite-borne multi-viewing-angle polarization spectrum imaging system for aerosol optical parameter measurement, and belongs to the technical field of optical imaging. The system is loaded on a satellite platform and comprises a telescope objective, a multi-slit assembly, a light-splitting prism, a collimating lens group, a plane grating group, an imaging lens group, a depolarization light-splitting prism group, a polaroid group and a detector group. The system is based on static multi-viewing-angle synchronous observation design, and realizes high-precision detection of aerosol optical parameters through multi-viewing-angle, hyperspectral and full-polarization multi-dimensional information fusion.

The invention provides an underwater structure surface three-dimensional deformation measurement method under explosion impact based on a combination of a single high-speed camera and a beam splitter prism, and the method comprises the steps: S1, taking the beam splitter prism as an observation window of a waterproof cylinder, and packaging the high-speed camera into the waterproof cylinder to form an underwater integrated optical three-dimensional imaging system; s2, a blue light stroboscopic light source is adopted for illumination, and a blue light narrow-band filter is added in front of the camera for filtering; s3, making a random speckle field on the surface of the measured object, and increasing gray information of the surface of the structure; s4, recording a sequence deformation image of the structure surface speckle field under the explosion impact by using an underwater integrated optical three-dimensional imaging system, and segmenting the image into a left sequence image and a right sequence image along a center line; s5, respectively carrying out sub-pixel time sequence matching on the left sequence image and the right sequence image; and S6, establishing a mapping relation between pixel coordinates of points in the image and refracted rays in the space, and performing three-dimensional reconstruction and three-dimensional deformation calculation of three-dimensional points according to intersection of left and right rays in the space.

The invention relates to a near-to-eye display optical system based on a laser light source and an LCOS modulation module, and belongs to the technical field of near-to-eye display. The invention aims to solve the technical problems that the existing near-to-eye display scheme is difficult to overcome speckle noise, chromatic dispersion, low luminous efficiency, overlarge size and the like at the same time. The system sequentially comprises a multi-mode laser light source module used for emitting low-initial speckle contrast imaging laser beams; the optical preprocessing module comprises a collimating lens group, a beam expanding prism and a phase perturber; the LCOS modulation module is used for simultaneously carrying out amplitude modulation on the light beam according to the image signal so as to load an image and carry out phase modulation so as to adjust wavefront, and reflecting and outputting an image light beam; the coupling module is used for carrying out light path coupling on the image light beam; and the near-to-eye display module is used for transmitting and projecting an image to human eyes. The system is mainly suitable for augmented reality glasses and other head-mounted display devices, and can realize high-image-quality and miniaturized near-to-eye imaging.

The invention provides a hyperspectral imaging system. The hyperspectral imaging system comprises a telescope group, a collimator objective, a prism, a volume holographic diffraction grating, an imaging objective and an imaging sensor which are arranged in sequence, the telescope group is composed of a primary reflector, a secondary reflector, a third reflector, a plane reflector and an entrance slit; the primary reflector, the secondary reflector and the third reflector form an off-axis three-reflector structure; the plane reflector is used for folding a light path; the collimating objective lens, the prism, the volume holographic diffraction grating, the imaging objective lens and the imaging sensor form an imaging spectrometer, and an entrance slit is used as object space input; the formed off-axis three-mirror and folded light path and an imaging spectrometer are in coaxial butt joint by taking an entrance slit as a node, and are used for joint correction and splicing to form a hyperspectral imaging system. According to the optical path architecture, optimal matching of the unobstructed total reflection front end and the transmission type rear end is realized, and the detection sensitivity of crop weak spectrum signals is greatly improved while a better modulation transfer function of a full view field is ensured.

The invention discloses a device and a method for synchronously detecting the focal length and the surface topography of a micro-lens array, which can realize synchronous detection on the focal length and the surface topography of the micro-lens array through a set of system, realize mutual matching between two parts of results and greatly shorten the detection time. The device comprises a first monochromatic laser light source (1), a first collimating lens (2), an attenuation sheet (3), a reflector (4), a microlens array sample (5), a microscope objective (6), a barrel lens (7), a first quarter-wave plate (8), an area array detector (9), a first monochromatic optical filter (10), a second monochromatic laser light source (11), a second collimating lens (12), a linear polarizer (13), a beam splitter prism (14), a polarization beam splitter prism (15), a second quarter-wave plate (16) and a reference lens (17). A third quarter-wave plate (18), a second monochromatic optical filter (19) and a polarization camera (20).

This invention discloses a coaxial telecentric polarization hyperspectral imaging device and a biological tissue detection system. The device includes: a light source emitting unpolarized light; a circular polarization generator converting the unpolarized light emitted by the light source into circularly polarized light; the circularly polarized light being coupled into a coaxial telecentric lens via a coaxial optical interface; the coaxial telecentric lens reflecting the circularly polarized light, which then illuminates the target object plane; the signal reflected from the target object re-enters the coaxial telecentric lens and is transmitted to a polarization analyzer module via a beam splitter. The polarization analyzer module includes a first waveplate and a first linear polarizer. The first waveplate receives the signal transmitted from the beam splitter and transmits the signal to the first linear polarizer. The first linear polarizer sends the output light to a hyperspectral camera, and the hyperspectral camera sends the output image to a computer for image analysis.

The invention provides an automatic coupling device for a fast-axis beam of a micro-channel laser stack array, and relates to the technical field of semiconductor lasers. The device comprises an optical platform, and the optical platform is provided with a stack array adjusting subassembly, a power-up subassembly, a UV curing subassembly, a lens adjusting subassembly, a dispensing subassembly, a near-field detection subassembly and a far-field detection subassembly. The stack array adjusting part is used for installing the stack array, and the power-up part is used for powering up the stack array. And the UV curing subassembly is used for curing the ultraviolet glue. And the lens adjusting subassembly and the dispensing subassembly are respectively used for adjusting the position of the fast axis collimating lens and dispensing. The SAC lens is arranged on a sliding plate of the dispensing subassembly through a fixing rod, during coupling, laser emitted by the micro-channel laser sequentially passes through the fast axis collimating lens and the SAC lens and then is divided into a far-field light beam and a near-field light beam by the beam splitter prism, the near-field light beam enters the near-field detection subassembly, and the far-field light beam enters the far-field detection subassembly. The device effectively solves the problems of low production efficiency, poor coupling precision and the like in the existing coupling mode.

A kind of mid-infrared supercontinuum light source of spatial light structure, comprising: pump source, for generating pump light;Collimating lens, for collimating pump light, output parallel light;Grating pair, by two grating parallel placement, for according to frequency to the light input to grating pair Spectral splitting is realized and the optical path of each frequency light is changed, output transmission light to roof prism;It is also used for the light that returns to grating pair from roof prism by original road to be compounded and pulse compression is realized, output compressed light to reflector;Roof prism, for the light that transmits grating pair is reflected again and transmits grating pair;Reflector, for reflecting the compressed light;Focusing lens, for focusing the compressed light reflected by the reflector;Fluoride fiber, the compressed light after focusing of focusing lens is spatially coupled into fluoride fiber at focal point, output mid-infrared supercontinuum laser.The utility model discloses in spatial light coupling system using grating pair compression pulse, the further widening of supercontinuum is realized.

This invention belongs to the field of high-power semiconductor laser array coupling technology, specifically providing an optical element dispensing and curing system and method based on dual-target monitoring. The system includes a multi-degree-of-freedom precision displacement platform, a vision inspection unit, a dispensing system, a dual-path photoelectric feedback module, and a central control unit. The dual-path photoelectric feedback module includes a beam splitting unit, an optical power detection unit, and a spot imaging detection unit. The beam splitting unit splits the laser beam into two paths, one of which is used for beam analysis to obtain the beam arrangement. The optical power detection unit receives the other beam from the beam splitting unit and provides real-time feedback of its optical power value. The spot imaging detection unit receives the reflected sampled beam. The central control unit integrates an industrial control computer and a motion control card. This invention designs a closed-loop hardware system including a beam splitting prism, dual detectors, and a multi-degree-of-freedom platform to solve the problem of low multi-degree-of-freedom coupling efficiency in existing technologies.

The invention discloses a high-performance ultraviolet visible light hyperspectral imaging system and an adjustment method thereof, and belongs to the technical field of spectral imaging, in the system, a front mirror assembly comprises a front primary mirror assembly, a front secondary mirror assembly, a front three-mirror assembly and a folding-axis mirror assembly; light enters through the incidence assembly, is reflected by the primary mirror assembly, the front secondary mirror assembly, the front three-mirror assembly and the folding-axis mirror assembly in sequence, enters the optical slit, and then enters the grating through the optical filter, the prism, the first rear mirror, the second rear mirror and the third rear mirror in sequence. And after being dispersed and reflected by the grating, the light sequentially passes through the rear mirror 3, the rear mirror 2 and the rear mirror 1, enters the prism, and reaches an imaging image surface after being reflected by the prism. According to the invention, high-reflectivity detection of an ultraviolet band can be realized, high-resolution detection of an ultraviolet visible spectrum of 280-1000 nm can be realized, and the highest spectral resolution of 0.5 nm can be realized; the imaging quality is close to the diffraction limit, plug and play is achieved, and the light and small layout has engineering applicability.

The application discloses a trace element detection system and method, and belongs to the technical field of spectral quantitative detection. The system comprises a laser, a sample stage and a spectral signal acquisition system. The laser ablates a sample to generate plasma after passing through a half-wave plate, a Glan prism, a dichroic mirror and a lens group. The acquisition system comprises a wide / narrow band spectral signal collection system and a trigger system: the wide band system comprises an axial and first lateral light path, couples full spectrum signals to a spectrometer, and is used for matrix identification; the narrow band system comprises a second lateral collection lens, a light splitting element and a UV / visible double channel, each channel is sequentially provided with a neutral density filter, an ultra-narrow band filter and a plano-convex lens, and is connected to a photomultiplier tube to an oscilloscope, and high-sensitivity detection of specific element characteristic spectral lines is realized; and the trigger system is used for triggering the spectrometer to acquire. The wide band and narrow band collaborative architecture is adopted, and both material matrix identification and high-precision quantitative detection of trace elements are considered.

The invention belongs to the technical field of computer vision and automatic control, and particularly relates to a two-degree-of-freedom optical tracking method and system based on monocular vision, a calibration plate is arranged on a scanner, and a single calibration image containing the calibration plate is shot through a monocular camera; calibration point coordinates of the calibration image are extracted, the calibration image is input based on an ideal camera imaging model, the physical spacing of each calibration point, the image resolution, the pixel size and the lens focal length are known parameters, and the principal point coordinates, the pixel size ratio, the principal distance and the z-direction translation amount of the camera are estimated; introducing a comprehensive lens distortion model containing radial distortion, eccentric distortion and thin prism distortion, and obtaining an accurate radial distortion coefficient, an eccentric distortion coefficient, a thin prism distortion coefficient and rotation and translation amounts of the camera through decoupling calculation; theoretical pixel coordinates of the calibration points are obtained through reverse re-projection, and calibration precision is evaluated and optimized; the camera visual angle is adjusted through the holder control system, so that the scanner is located in the center area of the camera visual field.

The invention belongs to the technical field of optical measurement, and relates to an MEMS fatigue evolution law observation device based on off-axis digital holographic microscopy, which comprises a red light super-radiation light-emitting diode light source, a wire grid type beam splitter, an objective lens and a CCD, and is characterized in that a linear polarizer, a half-wave plate and the wire grid type beam splitter are fixedly arranged on a light path emitted by a red light super-radiation light-emitting diode; a half-wave plate, a beam expanding lens group, a plano-convex lens, a beam splitter prism, an objective lens and a sample table are fixedly arranged on an object light path in sequence, a reflector is arranged on a vertical light path, and an optical delay line, the beam expanding lens group and the plano-convex lens are fixedly arranged on a reference light path; after the reference light passes through the reflector and the beam splitter prism, the reference light interferes with the object light reflected by the beam splitter prism on the CCD and is observed. According to the invention, the hologram of the MEMS device under high-frequency vibration can be acquired, and the surface topography of the MEMS device is obtained through computer rapid phase unwrapping, so that the purpose of observing fatigue evolution of the MEMS structure in real time is achieved.

The application relates to the technical field of spectral analysis, and discloses a fluorescence spectral analysis device and method based on a solid-state electron spin ensemble, wherein the spectral analysis device comprises a laser modulation unit, a confocal unit and a fluorescence processing unit; the laser modulation unit comprises a laser, a Griesinger-Taylor prism, an acousto-optic modulator, a beam expander, a collimating lens, a spatial light modulator, a spatial filter and a half-wave plate which are sequentially arranged; the confocal unit comprises a dichroic mirror, a focusing lens, a diamond and a microwave antenna which are sequentially arranged; the diamond has a solid-state electron spin NV color center; and the fluorescence processing unit comprises a filter group, a sleeve lens, a lens, a linear polarizer, a Bertin lens and a camera which are sequentially arranged. The application distinguishes the fluorescence generated by different axial NV color centers from the fluorescence level, and provides a thought and method for the miniaturization and bias magnetic field removal of a quantum detection device of the NV color center.

Embodiments of the present application relate to the technical field of electronic products. Provided are a prism motor, a rotation angle measurement method for the prism motor, and a camera device. The prism motor comprises a base, a prism carrier, a first electrode plate, at least two second electrode plates, and a conductor plate. The base comprises a bottom plate and a side plate. The prism carrier is disposed above the bottom plate. The prism carrier can rotate relative to the base about a first rotation axis and a second rotation axis. The first electrode plate is located on the surface of the bottom plate. The second electrode plates are located on the surface of the side plate facing the prism carrier. The conductor plate comprises a first conductor plate and a second conductor plate which are electrically connected to each other. During the rotation of the prism carrier relative to the base about the first rotation axis, the overlapping area between the orthographic projection of one second electrode plate on the side plate and the orthographic projection of the second conductor plate on the side plate increases, and the overlapping area between the orthographic projection of the other second electrode plate on the side plate and the orthographic projection of the second conductor plate on the side plate decreases, thereby at least improving the anti-shake precision of the prism motor.

The application discloses a kind of integrated detection device of lens center deviation and surface local tilt error, including base, rotary table, stand, lens clamping mechanism, optical detection mechanism and data processing and control unit;Optical detection mechanism is equipped with coaxial light source, collimating lens group, 50:50 beam splitter, two imaging lenses and image sensor, form transmission center deviation, reflection measure surface local tilt double synchronous optical path, rotary table is driven by servo motor and is equipped with angle encoder, lens clamping mechanism contains adjustable radial claw and precision axial positioning ring, the device can synchronously collect two-way images in single clamping, synchronously calculate two kinds of errors, without transporting lens, eliminate multiple clamping positioning error, data homology is convenient for error traceability, whole machine damping adjustable, adapt to multi-specification lens, integrated double detection function, reduce equipment procurement and site cost, effectively improve lens optical defect detection efficiency and precision.

The invention discloses a calibration device and method for calibrating the parallelism of a measuring surface of a large outside micrometer. The device comprises a mechanical adjustment module, an optical imaging module and an image processing and calculating module, the mechanical adjusting module is used for adjusting the position of the micrometer; the optical imaging module comprises an autocollimator and a double-turning prism system, a high-resolution area array detector is arranged in the autocollimator, the double-turning prism system divides a single-path collimated light beam emitted by the autocollimator into two paths, the two paths of collimated light beams are respectively projected to two measuring surfaces of a micrometer and receive reflected light of the two paths of collimated light beams, and two independent cross images are formed on the detector; the image processing and calculating module displays a view field containing two cross images in real time, sets one image as a reference zero position, calculates the angle deviation of the other image relative to the reference zero position in the X direction and the Y direction, and converts the angle deviation into a linear parallelism deviation value. The method can realize non-contact, automatic and visual calibration in the whole process, and has the characteristics of high precision, high efficiency and high repeatability.

The utility model belongs to the field of instrument calibration, and particularly relates to a high-precision calibration device for the spatial position and attitude of a satellite-borne optical camera. The device comprises a three-coordinate measuring instrument, a mounting shell, a laser theodolite, an accurate measuring mirror assembly, a large-aperture collimator and a beam splitter prism assembly, an imaging assembly mounting reference surface and an optical lens mounting reference surface are arranged on the mounting shell; an optical lens of a to-be-calibrated satellite-borne optical camera is mounted on the optical lens mounting datum plane, and an imaging assembly of the to-be-calibrated satellite-borne optical camera is mounted on the imaging assembly mounting datum plane; the accurate measurement lens assembly is installed on the satellite-borne optical camera. The large-aperture collimator is arranged on one side of an optical lens of the satellite-borne optical camera; the laser theodolite is arranged on one side of the satellite-borne optical camera; and the beam splitter prism assembly is arranged on an output light path of the laser theodolite. According to the utility model, the measurement precision of the space position attitude of the spaceborne optical camera is higher, and the adaptability is stronger.

The utility model discloses a low-magnification lens with a bottom monitoring function, which comprises a laser, a lens main body, a detection frame arranged at an exit port of the lens main body, a prism arranged on the detection frame, a low-pass high-reflection film arranged on an inclined surface of the prism, a detection module arranged on the detection frame, and an annular illumination light source arranged at the bottom of the detection frame, a light path from the laser to the exposure surface through the lens main body and the prism is a short-wave light path, the short-wave light path penetrates through the annular illumination light source, and a light path from the annular illumination light source to the detection module through reflection of the exposure surface and the prism is a long-wave light path; the light beam irradiated along the short-wave light path can penetrate through the prism to reach the exposure surface, the annular illumination light source irradiates the exposure surface and is reflected to the prism, the wavelength of the annular illumination light source is relatively long, and the light along the long-wave light path enters the prism and is reflected to the detection module for detection. Through the prism and the detection module, detection of features depicted by the small-magnification lens is realized.

The invention belongs to the technical field of target characteristic measurement, and particularly relates to a light and small three-light hyperspectral imaging device for target characteristic measurement and a calibration method. The device comprises a visible near-infrared hyperspectral imager, a visible light camera, a long-wave infrared camera, a one-dimensional turntable and a tripod. The visible light camera and the long-wave infrared camera are integrated on the hyperspectral imager, and the three optical axes are consistent. The visible and near-infrared hyperspectral imager is installed on the one-dimensional rotary table to achieve push-scanning, and an internal light path of the visible and near-infrared hyperspectral imager passes through the front lens assembly, the folding-axis lens assembly, the slit assembly, the Dyson prism assembly, the rear lens assembly and the grating assembly, then is reflected by the grating assembly, sequentially passes through the rear lens assembly and the Dyson prism assembly to be folded and then is incident to an image plane of the detector assembly. The long-wave infrared camera obtains the target radiation temperature. The problems that an existing device is large in size, heavy in weight, low in integration level and poor in optical axis consistency are solved.