1181 results about "Telescope" patented technology

The invention discloses a star map registration method based on a remote optical image, relates to the technical field of image processing, and solves the problems that the existing method is multi-oriented to a single telescope, most of the single telescope is aligned at a star point level, and the robustness is insufficient when parallax, distortion, optical difference and background pollution exist in remote multi-station imaging. The method comprises the following steps: acquiring a remote star map and extracting a star point centroid; angular distance calculation and triangle construction; registering the centroids of the star points in the whole image; performing similarity transformation and homography estimation; and carrying out sub-pixel refinement and full image registration. According to the invention, dual registration of star point centroids and pixel coordinates can be realized for star maps shot by a plurality of telescopes in different places, and meanwhile, a high-quality registration reference can be provided for subsequent three-dimensional information acquisition of a space target and identification and positioning of the space target.

The invention provides a compact hyperspectral imager optical system and an imaging method thereof, which are used for solving the technical problems that the overall size of a front telescopic assembly in a traditional hyperspectral imager optical system is difficult to compress, the installation and adjustment difficulty is relatively large, or the incident energy is lost and the space coverage capability is insufficient. And the technical problems of low energy utilization rate and difficulty in improving the sensitivity and the signal-to-noise ratio of the hyperspectral imager of the traditional Dyson type dispersion light splitting assembly are solved. The invention provides a compact hyperspectral imager optical system, which comprises an off-axis two-image-reflection telecentric optical path system based on a free-form surface and a Dyson light splitting system based on a curved surface prism, and realizes high regulation and control capability on light through multiple degrees of freedom of a curved surface shape. Compared with the prior art, the high-spectral imaging device has the advantages that the high-spectral imaging device is simple in structure, high image quality, small distortion and good telecentricity are achieved, meanwhile, the curved prism serves as a dispersion light splitting element, the whole spectrum has high light splitting efficiency, and the signal-to-noise ratio and sensitivity of the high-spectral imaging device can be improved.

The invention discloses a telescope parameter efficient optimization method and system based on a Bayesian algorithm and a fluctuation optical TTL coupling noise calculation model, and aims to solve the problem that a fluctuation optical high-precision calculation module is used for improving TTL coupling noise calculation precision in an existing telescope parameter optimization method. And due to frequent calling of a high-time-consumption module, the optimization time is sharply increased, and the efficient design requirement of a space gravitational wave detection task is difficult to meet. According to the method, on the basis of the principle of a Bayesian optimization algorithm, potential optimal to-be-evaluated telescope parameters are searched through an agent model, a collection function and the optimization function of Zermarkes software; and calculating TTL coupling noise of the telescope to be evaluated by combining a light field propagation calculation method based on a wave optics theory with a light field-phase resolving method, carrying out iterative optimization on telescope parameters, and outputting optimal TTL coupling noise and optimal telescope optical parameters.

The invention belongs to the technical field of telescope manufacturing, and discloses a large-view-field telescope optical system which is characterized in that a first objective lens, a second objective lens, a third objective lens, a focusing lens, a semi-pentaprism, a roof prism, a first eyepiece lens, a second eyepiece lens and a third eyepiece lens are sequentially designed from the object side to the image side in the optical axis direction. According to the optical system, only the ten lenses have diopters, the requirement for the field of view of 6.7 degrees under the 8-fold condition is met, and the exit pupil distance reaches 22.6 mm.

The invention discloses a miniature camera and laser common-caliber optical system and a use method, and relates to the field of laser optical instruments. The problem that an existing multi-band common-caliber optical system cannot achieve integration, multi-functionalization and miniaturization at the same time is solved. The miniature camera and laser common-aperture optical system comprises a zoom optical lens group, a beam expanding telescope group, an electromagnetic galvanometer, a spectroscope, a fast reflecting mirror and a laser light source. The laser converging zoom optical lens group and the fine tracking imaging branch are respectively connected with the zoom cam lens cone and the fine tracking lens cone, the beam expanding telescope group is connected with the antenna frame, and the electromagnetic galvanometer, the spectroscope and the reflector are all connected with respective bases. The optical axis collinear coupling design is adopted among the components, it is ensured that a laser path and an image path are completely overlapped, and high-precision image guide striking control is achieved. The small mobile platform is suitable for industrial precision machining and rapid identification, high-precision tracking and laser precise striking of short-range dynamic targets.

The invention discloses an intelligent telescope scenery image acquisition and processing system based on artificial intelligence, which relates to the technical field of image communication and comprises a multi-telescope collaborative acquisition and fusion module, a distributed networking module, a content perception compression and transmission module, a feature encryption isolation module and a terminal-cloud collaborative communication module. According to the invention, through an integrated architecture design of multi-mirror collaborative acquisition fusion, distributed networking, content awareness compression transmission, feature encryption isolation and end-cloud collaborative communication, full-process collaborative optimization of scenery image acquisition, transmission, encryption and end-cloud interaction is realized. The integrity of image acquisition, the adaptability of transmission, the security of data and the efficiency of end-cloud collaboration can be remarkably improved, so that the problem that links of acquisition, transmission, encryption and end-cloud collaboration in an existing intelligent telescope image acquisition and processing system are split can be solved; therefore, the technical problems of poor image quality, low transmission efficiency, large data safety hidden trouble and poor terminal-cloud interaction adaptability are solved.

The invention discloses a cloud phase fine identification and liquid water and ice water quantitative remote sensing device, which comprises a split-phase cloud water quantitative detection laser radar, a novel temperature and humidity remote sensing system and a millimeter wave cloud radar, and is composed of a laser emission module, a telescope receiving module, a microwave radiation module, three laser radar detection modules and a digital signal processing module. The system is composed of a central control processing module and a terminal server. The invention further discloses a remote sensing method of the quantitative remote sensing device. All-day detection and quantitative inversion of liquid water, ice water, water vapor, aerosol and cloud are achieved through the split-phase cloud water quantitative detection laser radar. A novel temperature and humidity remote sensing system is adopted to realize real-time fine detection of a temperature and humidity profile in the cloud. According to the cloud phase state fine identification and liquid water and ice water quantitative remote sensing device and method provided by the invention, the problems that the quantitative detection precision of the liquid water and ice water content in the cloud is insufficient and the mixed phase cloud identification is difficult in the prior art are solved.

The invention relates to the technical field of optical detection, and particularly provides a mirror surface detection method for a large-aperture spliced telescope, which comprises the following steps of: emitting light from a focus position by using a light source, reflecting the light through a mirror surface of the large-aperture spliced telescope to enter a discrete lens arranged at the rear end, and splitting the light by using a spectroscope to obtain a split light beam; the first light beam enters the camera to obtain interference fringes of the splicing seams, the second light beam enters the optical switch to carry out aperture coding, and the mirror surface precision of the large-aperture spliced telescope can be determined according to the code of each splicing seam and the confocal and co-phase information of the sub-reflectors on the two sides of the splicing seam. According to the invention, splicing seam detection is carried out through focus reverse auto-collimation, the problem that an oversized collimator is needed traditionally is avoided, point-by-point detection is carried out on the sub-reflectors according to the splicing seam, and confocal and co-phase detection of the adjacent sub-reflectors is realized according to interference fringes.

The invention discloses a planetary atmospheric trace gas spectrum telemetering and in-situ fusion detection system and method, and belongs to the technical field of deep space exploration. The detection system has a telemetering mode and an in-situ detection mode, and comprises a telescope module, a laser light source module, a heterodyne spectrum telemetering module, an in-situ absorption spectrum module, a gas sampling and enriching module and a signal acquisition, processing and control module. In the on-orbit stage, a heterodyne spectrum telemetering module is adopted, and a laser light source and sunlight signals are subjected to frequency mixing for atmospheric component telemetering; and after the detector enters an atmospheric descending section, the in-situ absorption spectrum module performs in-situ absorption spectrum measurement by utilizing the detection light of the same laser light source. By performing space-time fusion and joint inversion on the data acquired in the two modes, coherent detection from large-range general survey to fixed-point detailed survey is realized, the problems of load separation of telemetering and in-situ detection and difficulty in data fusion are solved, and the detection efficiency, the data consistency and the integration level of the system are greatly improved.

The invention discloses a sighting point track measuring method of a sighting telescope. The method comprises the following steps: acquiring at least one sighting scene image comprising a light spot position on a target; for each aiming scene image in the at least one aiming scene image, intercepting a region of interest in each aiming scene image according to the proportion of the light spot pixel number in each aiming scene image to obtain at least one region of interest; and determining the aiming point track according to the at least one region of interest and the firing action of the shooting body. According to the method, the region of interest is dynamically determined according to the proportion of the number of light spot pixels in the first aiming scene image, precise matching with target features can be self-adapted, further, row-column accumulation operation is performed on pixels higher than the proportion, background interference is effectively inhibited, track core features are reserved, and meanwhile, the accuracy of the target features is improved. And the redundant calculation amount is greatly reduced.

The invention discloses an automatic target tracking method and system based on satellite laser ranging echo signals, and the method comprises the steps: S1, carrying out the space scanning of an uncertain domain of a ranging target through employing a regular hexagon dense scanning strategy, and completing the searching and capturing of the target; s2, after the target is captured, correcting the direction of the telescope by dynamically switching a global optimization mode and a local optimization mode by adopting a miss distance optimization method combining a Bayesian optimization algorithm and a local optimization algorithm, so as to complete the optimization of the miss distance; s3, target tracking is carried out based on the optimized miss distance, and echo signal intensity is monitored in real time; and S4, judging whether the signal is attenuated or not, re-triggering the miss distance optimization process when detecting that the signal is attenuated, and otherwise, maintaining the current tracking state.

The invention discloses a large-aperture telescope shafting angle detection method based on an arc grating encoder. The method comprises the following steps of: tensioning and mounting a linear grating ruler along the circumference of a shaft system turntable to form an arc grating body; n reading heads are uniformly arranged along the circumference of the rotation direction of the shaft system, the rotation position information of the shaft system is read, the effective range of the arc grating is calculated and converted into angle information, and the resolution of the arc grating is calculated; installing a full-circle grating, obtaining the detected shafting rotation position information, comparing the detected shafting rotation position information with the arc grating angle detection information, and verifying the correctness of the position information obtained by the arc grating. The arc grating is used for replacing an angle measurement grating, the measuring range and the resolution of the arc grating can be accurately obtained, the correctness of information obtained by the arc grating is verified through the concentric-shaft full-circle grating, the closed-loop effect does not exist, the machining difficulty is low, meanwhile, the length of the grating ruler can be selected according to the rotation range of a shaft system, and the measurement precision is high. And the installation and adjustment difficulty is reduced.

1. Name of the product in this design: Handheld Cooled Day and Night Observation Instrument. 2. Purpose of this design: For observation, and can be used with observation instruments such as thermal imagers, night vision devices, telescopes, and rangefinders. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention provides an infrared target simulator focusing collimation projection optical system and a design method thereof. The optical system is composed of a telescope objective, an intermediate field lens and a relay lens group. A source target and a background image generated by the infrared target simulator are input into the DMD and then are incident to the focusing collimation projection optical system through the DMD, the incident light firstly passes through the relay lens group and the intermediate field lens to generate a primary image of the image on the DMD, and then the primary image surface is collimated and projected to an entrance pupil of a tested photoelectric device through the telescope objective. According to the invention, optical material parameters are finely analyzed and matched, three infrared optical materials are adopted to form a lens group, a field lens is added to compress the aperture of a light beam, and only five lenses are used, so that achromatism and athermalization are realized while high transmittance is ensured. And a focusing lens group and a precise mechanical structure are arranged in the relay lens group, so that the target simulation requirement of photoelectric detection equipment such as a guide head at a wider working temperature range is met, and meanwhile, the requirement of obtaining a clear simulation target scene by matching detected photoelectric equipment with different working distances can be met.

A lidar system for simultaneously measuring the column concentration of methane and the profile concentration of water vapor in the atmosphere is disclosed. The device includes a laser emission module: a 1645nm monoline seed laser, a 1645nm offline1 seed laser, a 1645nm offline2 seed laser, a 1064nm pump laser, a laser frequency-locking module, an optical parametric oscillator, a frequency doubling module, and emitting optical components; an echo receiving module: an integrating sphere module, an optical receiving telescope assembly, a beam splitter, filter assembly 1, filter assembly 2, photodetector 1, and photodetector 2; and a data acquisition and processing module. This invention utilizes the frequency doubling relationship between the absorption lines of methane and water vapor to simplify the complex structure of a dual-band, multi-wavelength laser. It employs seed-injected optical parametric oscillator technology to obtain a high-frequency stable 1645nm fundamental frequency light, which is then frequency-doubled to obtain an 822nm laser. The profile concentration of water vapor and the column concentration of methane in the atmosphere can be measured using differential absorption lidar (DIAL) and integral path differential absorption (IPDA) technologies, respectively.

The invention discloses a space-based double-satellite asynchronous detection multi-target correlation positioning system and method, the system comprises space-based optical satellites and a central processing unit, each space-based optical satellite is equipped with a large-view-field optical electro-telescope, and the large-view-field optical electro-telescope is used for carrying out image acquisition on a space target; and the central processing unit comprises a computer, the computer is in communication connection with the space-based optical satellite, and an image processing module, an angle measurement data generation module, a data association module and a target positioning module are integrated in the computer. According to the characteristics of space-based double-star asynchronous observation, a complete process from image processing, angle measurement data generation, time series data association to final positioning is designed, and the method is particularly suitable for monitoring and positioning a large number of space non-cooperative moving targets; by introducing time registration and sequence geometric consistency judgment, the association problem caused by asynchronous double-star observation time is effectively solved, and the accuracy and robustness of data association in a multi-target scene are improved.

The utility model relates to a binocular handheld telescope which comprises a first lens cone and a second lens cone, the first lens cone and the second lens cone are arranged side by side, a first optical imaging system is arranged in the first lens cone, and a second optical imaging system is arranged in the second lens cone. The focusing parameters of the first optical imaging system and the second optical imaging system are different; the handheld assembly is connected between the first lens cone and the second lens cone; wherein the handheld assembly comprises a focusing assembly, and the focusing assembly independently adjusts the focal length of the first optical imaging system and the focal length of the second optical imaging system. The embodiment of the utility model provides a binocular handheld telescope. Focal length adjustment of an optical imaging system with a plurality of different focusing parameters can be independently realized through a focusing assembly.

The invention discloses a space remote sensing target positioning optical system based on multi-aperture imaging and a calibration method, and relates to the field of remote sensing and aerospace imaging optical instruments. The contradiction that the large view field and high-resolution imaging requirements of a traditional single-aperture optical imaging system are difficult to consider at the same time is solved, accurate positioning of a target is achieved, and the intelligent requirement of a multi-aperture optical imaging system is met. The multi-aperture imaging space remote sensing target positioning sub-aperture imaging optical system comprises an electromagnetic galvanometer, a beam shrinkage telescope group, a fast reflecting mirror and a rear focus lens group. The beam shrinking telescope group is connected with the rear focus lens group through a fast reflecting mirror, and a light beam is connected with the imaging branch through an electromagnetic galvanometer. And after passing through the telescopic system, the imaging light beam is reflected by the fast reflecting mirror and then focused to the detector for imaging. The method is also suitable for a mobile platform for carrying out rapid positioning and high-precision capturing on a dynamic target in the fields of industrial precision machining and space remote sensing.

The invention discloses a wide-temperature-range adaptive medium-wave infrared slit-free spectrometer, and solves the technical problems that the energy consumption of the slit-free spectrometer is high and the size and the weight are difficult to miniaturize due to the fact that an integral refrigeration method needs to depend on large refrigeration equipment in the prior art, and the imaging quality of the slit-free spectrometer is seriously deteriorated due to a local refrigeration method. Comprising a front telescope system group, a light splitting system group, a plane mirror, a relay system group and a refrigeration type detector optical system group which are sequentially arranged along the propagation direction of an object space imaging light beam. The movable distance of the detector is set in the range, so that the slit-free spectrometer adapts to the change of the temperature gradient of the first temperature interval and the second temperature interval in the range, and the imaging quality is high.

The utility model relates to the field of reflective film processing, and discloses reflective film processing feeding adjusting equipment which comprises a bottom plate, vertical rectangular blocks are fixedly installed at the four corners of the top of the bottom plate respectively, lifting structures are arranged on the vertical rectangular blocks, a guide assembly is arranged between every two vertical rectangular blocks on the same side, and the lifting structures are arranged on the guide assemblies. The two ends of the guide assembly are connected with the corresponding lifting structures correspondingly, an electric telescopic rod is installed in the middle of the surface of the bottom plate, a concave installation block is fixedly installed at the telescopic end of the electric telescopic rod, and a top shaft is rotationally installed on the inner side of the concave installation block. When the reflecting film is fed, the required tension is different, at the moment, an electric telescopic rod is started, an output shaft of the electric telescopic rod stretches upwards, then a jacking shaft moves upwards, the jacking shaft jacks up the reflecting film, and the guide tension is increased, so that different tension required when the reflecting films of different specifications are reguided to be fed is adapted.

The invention discloses a telescope installation and adjustment method, device and equipment and a medium, and relates to the technical field of optical installation and adjustment, and the method comprises the steps: obtaining an ideal wave surface diagram of a telescope to be installed and adjusted at a target field point through optical simulation software, and adding a plurality of misalignment amounts to the optical simulation software, extracting a plurality of corresponding maladjustment wavefront diagrams at the target view field point; according to the plurality of misalignment amounts and the plurality of misaligned wavefront diagrams, determining wavefront diagram sensitivities corresponding to the plurality of misalignment amounts, and combining the wavefront diagram sensitivities to obtain a wavefront diagram sensitivity matrix; an interferometer is used for collecting an actually-measured wave surface diagram of the telescope to be installed and adjusted at the target view field point, and wave surface diagram variable quantities caused by a plurality of misalignment quantities are determined through the actually-measured wave surface diagram and the ideal wave surface diagram; and based on the wave surface diagram variable quantity and the wave surface diagram sensitivity matrix, establishing a relationship between the target misalignment quantity vector and the actually measured wave surface diagram so as to determine the target misalignment quantity vector, and carrying out adjustment operation on the telescope to be adjusted according to the target misalignment quantity vector.

The invention relates to the technical field of space telescope calibration, in particular to a telescope pointing calibration method based on optical fiber interconnection, which comprises the following steps: providing reference light beams in different directions, enabling each lens to correspondingly receive the reference light beams by adjusting the lens pointing, splitting the reference light beams received by the lenses through an optical splitter, and obtaining a split beam; one beam is aligned and corrected through a camera, and the other beam is coupled into an optical fiber to record direction information; the calibration light beams are reversely emitted by the optical fiber through the optical switch and are emitted by the lens, each reference light beam in the known direction is reproduced, a reference light field is formed, the telescope to be calibrated is placed in the reference light field, the miss distance of each calibration light beam in the known direction on the mirror surface of the telescope to be calibrated is measured, and the pointing error is calculated and corrected according to the miss distance. The optical fiber network is used for establishing the unique mapping relation between the space direction and the optical fiber channel, miss distance measurement is carried out through dynamic time-sharing reproduction, and the problems of mechanical accumulative errors and the like existing in a traditional mechanical calibration method are solved.

A work platform includes a plank which telescopes to a desired width. The work platform includes a first leg assembly rotatably attached adjacent to a first end of the plank. The work platform includes a second leg assembly rotatably attached adjacent to a second end of the plank. The work platform includes a first linkage attached to a first leg of the first leg assembly. The first linkage may be a first hook or a first strap assembly for securing the work platform to a first support structure. A method for using a work platform. A method for producing a work platform.

The invention relates to the technical field of ocean detection equipment, and particularly provides an ocean laser radar system and a seawater multi-parameter detection method. The system comprises a laser emission subsystem, an optical receiving subsystem and a signal acquisition and control subsystem. The laser emission subsystem can emit multi-wavelength pulse laser to seawater; the optical receiving subsystem adopts a double-receiving telescope structure, respectively receives scattering and fluorescence signals with different properties, and realizes multi-channel signal separation through light splitting, light filtering and polarization light splitting elements; and the signal acquisition and control subsystem realizes synchronous acquisition and processing of multi-channel data. The system can synchronously invert water optical parameters, water particulate matter depolarization ratio and color ratio, chlorophyll concentration, suspended load concentration and other multi-parameter profiles, and is suitable for marine environment unattended monitoring of a fixed platform and a mobile platform.

The invention discloses a picture type hyperspectral full-wave band imaging system based on image space scanning. The system comprises a telescope system, an image space scanning mirror, a view field separation device, a spectrograph and a detector, wherein the spectrograph and the detector are arranged at different wave bands from visible light to long-wave infrared light; wherein the image space scanning mirror is in the shape of a cylinder with a right triangle section, a central optical axis is arranged in the image space scanning mirror, and the image space scanning mirror can move in parallel or rotate horizontally along the central optical axis to form rectangular view fields in different directions and at different angles; light from the rectangular area of the earth surface is converged to the image space scanning mirror through the telescope system, and a plurality of rectangular view fields are formed at different positions; and after passing through the field of view separation device, the light is split by a spectrograph and received by a detector in different bands of visible light-long wave infrared, and the problem of virtual focus of an image plane is avoided in the process of obtaining the hyperspectral full-band earth surface information in a picture manner. According to the invention, a foundation is laid for high-resolution area array staring imaging and full-band picture type hyperspectral and multispectral comprehensive detection.

The invention relates to the technical field of laser radar wind measurement, and discloses a lightweight coherent wind measurement laser radar system, which comprises a telescope system, a rotary loading main body shell, a scanning servo system, a laser emission module, a signal processing module, an environment monitoring module and a multi-mode communication module. Polarization control strategies are set according to different scanning directions, and the consistency standard of laser echo signal quality is guaranteed; meanwhile, whether the optical transmission distortion phenomenon exists in the scanning process or not can be recognized in real time by monitoring the spectral characteristics of the light source and the offset state of the preset reference in real time, the accuracy of Doppler frequency shift calculation is guaranteed, and the system error of wind field inversion is further reduced; whether an optical scanning axis deviates from a theoretical pointing reference or not is judged in real time by resolving a spatial deviation value of a radar body rotation attitude and a standard scanning track; therefore, the system can avoid the detection omission of the key atmospheric structure.

An optical system of binoculars includes a first object biconvex lens of positive focal power, a second object meniscus lens of negative focal power, a third object meniscus lens of positive focal power, a fourth object meniscus lens of negative focal power, a half pentaprism, a roof prism, a first eyepiece biconcave lens of negative focal power, a second eyepiece biconvex lens of positive focal power, a third eyepiece biconvex lens of positive focal power, a fourth eyepiece meniscus lens of negative focal power, and a fifth eyepiece meniscus lens of positive focal power. These are sequentially arranged along an optical axis direction from an object side to an observation side. When focusing, the fourth object lens moves along the optical axis direction. The binoculars include an exit pupil diameter range of 3.5 mm-4.5 mm, an exit pupil distance range of 15-18 mm, and a field angle range of 6°-6.5°.

The invention belongs to the technical field of telescope manufacturing, and discloses a small-caliber large-view-field telescope optical system which is characterized in that an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing lens, a semi-pentaprism, a roof prism, an eyepiece first lens, an eyepiece second lens and an eyepiece third lens are sequentially arranged from the object side to the image side in the optical axis direction. According to the optical system, a large field of view of 6.7 degrees can be realized under the condition of 10 times.

The invention discloses a dual-band multi-wavelength laser radar and a coaxial transmitting and receiving method thereof, and belongs to the technical field of laser radars, the laser radar comprises an industrial personal computer, a laser, a transmitting light path, a receiving telescope, a collimating lens, a first detector, a second detector and a data acquisition module; a laser is controlled by an industrial personal computer to output laser of two wave bands, the laser of the two wave bands is adjusted and expanded in an emission light path and then is emitted into the atmosphere at the same time, the laser interacts with molecules and aerosol in the atmosphere, and an atmosphere back scattering echo signal is collected by a receiving telescope; after being collimated by the collimating lens and split by the spectroscope, two wavebands are respectively received by the two detectors and are input into the industrial personal computer for data processing and result display; the lasers of the two wave bands are detected simultaneously through the wavelength division multiplexing technology, and the lasers of different wavelengths in the same wave band are subjected to time division switching detection through the time division multiplexing technology. According to the invention, the multi-target gas profile detection capability of a single laser radar system can be improved.

The invention discloses an alignment method for a resonant cavity of a beam-expanding telescope, and relates to the technical field of beam-expanding telescopes. The method comprises the following steps: when no beam expander exists, enlarging the plane mirror to maximize the power of the through hole diaphragm and make the through hole diaphragm vertical to a light beam; and adjusting the third reflector to the CCD to form circular interference to obtain a reference light path. After the beam expander is arranged, the first reflector and the second reflector are finely adjusted to enable the light beam to penetrate through the small hole again, the CCD reproduces the circular ring, and incidence-telescope axis alignment is completed; the first cavity mirror and the second cavity mirror are sequentially added, pitching / yawing fine adjustment is conducted, and circular ring interference is kept, namely resonant cavity alignment is achieved. The difficulty of parallel alignment between the input light beam and the optical axis of the telescope and the difficulty of alignment between the endoscope and the telescope can be effectively reduced.