60 results about "Prism pair" patented technology

The invention discloses a three-magnification double-telecentric light path object detection system and method. A detection part is arranged between a light source module and an object space telecentric light path module; the light source module comprises a white light annular LED array light source set and an adjustable grating arranged on one side, and a light uniformizing piece is arranged in the white light annular LED array light source set. Light emitted by the array light source group is homogenized by the built-in light homogenizing sheet and then forms uniform light beams through the adjustable diaphragm, and the uniform light beams are projected to the surface of a detection part; a light path switching mechanism is arranged on one side of the object space telecentric light path module, and the object space telecentric light path module comprises a low-magnification object space light path, a medium-magnification object space light path and a high-magnification object space light path; the light path switching mechanism is used for switching any one of a low-magnification object space light path, a medium-magnification object space light path and a high-magnification object space light path to enable light rays to be projected to the beam splitter prism, ambient light is removed through the beam splitter prism, and the transmitted light rays are transmitted towards an image space telecentric light path to enable the light rays to be projected to the industrial camera for imaging.

The present disclosure provides a method and system for forming an infrared complex image of a moving target and performing synthetic aperture imaging using a sub-mirror array. The method comprises: using a spatial light modulator to phase-modulate an initial linearly polarized laser local oscillator to obtain an orthogonal phase-modulated laser local oscillator; using a depolarizing beam splitter in each sub-mirror module to combine the orthogonal phase-modulated laser local oscillator and a target infrared signal processed by Fourier transform to obtain a combined beam signal; using a direct array detector to receive the combined beam signal, generate a holographic image corresponding to the sub-mirror module, and combine the laser local oscillator image to construct an infrared complex image corresponding to the sub-mirror module; and performing synthetic aperture imaging on the infrared complex images corresponding to the multiple sub-mirror modules based on sub-mirror array parameters and target distance parameters to obtain a synthetic aperture imaging result, wherein the infrared complex images corresponding to each of the multiple sub-mirror modules are obtained at the same moment during the motion of the moving target.

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.

The invention provides a method and a system for accurately positioning a first beam section of a segmental beam by a short line matching method, which are used for optimizing a pier-side bracket opposite-pulling deformed steel bar tensioning construction process, enhancing the stability of a bracket and improving the mounting precision and the construction efficiency of the first beam section; before the first beam section is adjusted, the bracket is pre-pressed, and the influence of non-elastic deformation of the bracket on the positioning accuracy of the first beam section is eliminated; by controlling the axis deviation and flatness of the middle supporting legs, the influence of unbalance loading generated by the kiloton bridge girder erection machine on the line shape of the first beam section is avoided; the centering rod of the prism is regularly self-checked and corrected, so that measurement errors caused by inclination of the centering rod are eliminated; elevation control encryption adopts a zenith distance method, so that the precision is high, and linear control of segmental beam erection is facilitated; before a front auxiliary supporting leg of the bridge girder erection machine is in place and after a pier top block is hoisted, multi-measurement-back displacement monitoring is carried out on a pier body, and the accuracy of a line shape under the working condition is guaranteed. According to the method, the influence of each factor on the positioning precision of the first beam section is eliminated, so that the positioning precision of the first beam section is controlled within a standard allowable range.

The invention relates to a visual and optical feedback combined optical element rapid alignment method and device, and the method comprises the steps: plane mirror alignment and beam splitter prism alignment, the plane mirror alignment establishes a reference optical axis for beam splitter prism alignment, and visual feedback coarse alignment and optical feedback fine alignment are successively adopted in the two stages. During visual feedback coarse alignment, the inclination angle of the plane mirror or the beam splitter prism is calculated and adjusted according to the coordinates of light spots on the imaging screen, so that the light spots return to the target center or coincide with the target center; during optical feedback fine alignment, spiral gradient rising is adopted to search and adjust the inclination angle of the beam splitter prism, so that the reflected light intensity is maximum. The alignment device comprises a clamp which is used for fixing a gradient refractive index lens and is provided with an imaging screen in the direction of a light emitting surface, a side surface imaging device, a first rotating platform fixed with a plane mirror, a second rotating platform for clamping a beam splitter prism and the like. By utilizing the method and the device, the alignment precision and the alignment efficiency of the gradient refractive index lens, the beam splitter prism and other optical elements can be improved.

The present invention relates to a Raman light state-selective interferometer device for an atomic interference gyroscope. A polarization beam splitter prism is used to spatially split the Raman interference light, so that the two Raman interference light beams share a Raman interference collimator, thereby reducing the number of collimators. A triangular reflecting prism is used to allow the Raman state-selected light and the Raman interference light to share a polarization beam splitter prism, resulting in a compact structure and space-saving, which can effectively reduce the size of the atomic interference gyroscope device. A large flat reflector with a good surface shape is used to replace a traditional plurality of independent reflectors, thereby solving the problem that the atomic interference gyroscope has a high requirement for the parallelism of the effective wave vectors between the two Raman light beams, which makes the assembly and adjustment difficult.

The utility model discloses a beam splitter prism gluing device which comprises a supporting frame, a mounting frame is rotatably connected to the interior of the supporting frame, adjusting assemblies are symmetrically and rotatably connected to the interior of the mounting frame, a first gluing clamp and a second gluing clamp are movably connected to the symmetrically-arranged adjusting assemblies, and the second gluing clamp is located above the first gluing clamp. The first gluing clamp and the second gluing clamp are symmetrically arranged, the driving assembly is arranged in the mounting frame, the two ends of the driving assembly are movably connected with the outer walls of the bottom ends of the adjusting assemblies correspondingly, and the number of the fixing clamps is two. According to the scheme, the mounting frame is matched with the first gluing clamp, the second gluing clamp and the adjusting and fixing clamp mounted on the gluing clamps to clamp the prisms, the driving assembly is started to be matched with the adjusting assembly, and the first gluing clamp and the second gluing clamp can be adjusted to move oppositely so that the two prisms can be aligned and spliced; therefore, the processing precision of the beam splitter prism can be improved, and the production quality of the beam splitter prism is enhanced.

The invention discloses a preparation method and device of an optical element, a readable storage medium and an imaging module, and relates to the technical field of optics. The preparation method of the optical element comprises the following steps: acquiring a first prism and a second prism, and determining a combined contact surface on the first prism; carrying out region division treatment on the combined contact surface to determine a film coating region in the combined contact surface; performing etching treatment on the film coating area so as to process the first prism into a third prism; performing thin film deposition treatment on the etched film coating area so as to process the third prism into a fourth prism; and combining the second prism on the combination contact surface of the fourth prism to obtain the optical element. The optical characteristics of the optical element are improved.

The present invention relates to the technical field of microscopes, and in particular to a solid microscope comprising an eyepiece, an interpupillary distance adjustment component, an optical hinge group, a prism steering group, a distributed reflective optical path component, and a continuously variable magnification objective lens group; the distributed reflective optical path component comprises a negative lens group, a positive lens, a negative lens, and a positive lens group; the negative lens group is arranged between the prism steering group and the continuously variable magnification objective lens group, the positive lens is arranged between the optical hinge group and the prism steering group, and both the negative lens and the positive lens group are arranged between right-angle prisms in the optical hinge group; by sequentially arranging the negative lens group, the positive lens, the negative lens, and the positive lens group between various components of the solid microscope, thereby combining the mechanical structure spatial layout, adjusting the light beam aperture, reducing the interception of the light beam by the prism, and reducing off-axis vignetting, thereby solving the technical problem in the prior art that the solid microscope has large off-axis vignetting and poor imaging quality due to the light path passing through multiple prism groups, and meeting the overall imaging requirements.

Embodiments of the present application provide a display panel. The display panel comprises a light emitting device arranged on a silicon-based circuit substrate, the light emitting device comprising a first light emitting device, a second light emitting device and a third light emitting device, and a prism group comprising at least a first direction-changing prism, a second direction-changing prism and a converging prism. Different prisms are arranged on light emitting devices of different colors, and the first direction-changing prism and the second direction-changing prism reflect the light emitted by the corresponding light emitting devices to the converging prism to form display light. In the embodiments of the present application, by arranging the prism group, the light is affected by different prisms in the prism group, and then the light in different pixel areas is collected on the light emitting surface of the prism group corresponding to the same light emitting device, and then emitted, thereby effectively improving the concentration of light at the center of light emission, reducing the dispersion of the panel, and improving the display effect of the device.

The invention belongs to the field of laser radar systems, and discloses a three-dimensional imaging single-photon laser radar system based on multi-beam eye-like scanning, which is composed of a laser, a DOE, a perforated reflector, a Risley scanning prism, a telescope, a detector array, a time-to-digital converter and a two-dimensional holder. The laser generates a detection light beam, the detection light beam passes through the DOE to generate a two-dimensional light beam array, the light beam array passes through a small hole in the center of the perforated reflector, a view field range is scanned through the Risley prism, and a scanning path is an eye-like pattern; echo signals enter along the same optical axis through the Risley prism, are reflected to the telescope through the perforated reflector and are converged to the detector array through the telescope, and photosensitive surfaces of the detector array correspond to view fields of the detection light beam array one to one.

A light emitting module includes a semiconductor laser, a collimating lens for that collimates light beam output from the semiconductor laser, a prism pair including two substantially triangular-plate-shaped prisms, each passing the light beam between two end surfaces on both sides of one apex angle to refract the light beam, and the prisms being sequentially arranged on an optical path of the light beam in such a manner that the orientations of apex angles of the prisms are opposite to each other, and a rotary stage configured to hold the prism pair and to be rotatable about a rotation axis C extending in a prism thickness direction in such a manner that an incident angle of the light beam entering the prism positioned on the upstream side of the optical path is changed.

The utility model discloses a batch detection jig for cavity surfaces of edge-emitting lasers. The batch detection jig comprises a support frame; the at least three reflectors are sequentially embedded in the supporting frame, so that the parallel incident light is emitted upwards after the angle is changed; and the at least three fixing devices are fixed on the support frame, are in one-to-one correspondence with the reflectors, and are used for fixing an edge-emitting laser and enabling reflected light of a cavity surface of the edge-emitting laser to penetrate through the reflectors to be emitted upwards. According to the utility model, the reflecting prism can be utilized to carry out appearance detection on the cavity surface of the edge-emitting laser in the loading tray. Pollution or damage risks caused in the process that the laser needs to be taken and placed in a traditional detection mode are overcome, and efficiency is improved.

The utility model discloses a transformer partial discharge monitoring devices based on arc spectrum analysis has energy quartz optical fiber, and one end of energy quartz optical fiber is sleeved with quartz sleeve, and the end of quartz sleeve is provided with focusing lens, and the other end of energy quartz optical fiber is connected with optical fiber flange through ceramic plug core, and the emergent light path of optical fiber flange is sequentially and interval provided with convex lens, visible light split prism and ultraviolet light split prism, and visible light split prism produces reflection to the visible light of 450~780nm wavelength, and ultraviolet light split prism produces reflection to the ultraviolet light of less than 280nm wavelength, and the reflection light path of visible light split prism is provided with silicon light detector, and the reflection light path of ultraviolet light split prism is provided with first ultraviolet light detector, and the transmission light path is provided with second ultraviolet light detector, and silicon light detector, first ultraviolet light detector and second ultraviolet light detector all are electrically connected with MCU through data acquisition card.

The application discloses a precision surface three-dimensional appearance measurement device and method based on phase shift digital holography, which comprises the following modules: a light beam splitting module for generating a reference light and an object light beam irradiated to the surface of a measured object and returned; a reference light beam adjusting module for receiving the reference light generated by the light beam splitting module, generating different reference light beams based on different voltage forces, and generating different reference light beams after different brightening and increasing; a lens imaging system for receiving the object light beam generated by the light beam splitting module and performing light beam amplification; a second polarization beam splitter for receiving the different reference light beams generated by the reference light beam adjusting module and the amplified object light beam of the lens imaging system, and performing light beam combination; a linear polaroid for respectively interfering a series of light beams after combination; an image acquisition module for acquiring a series of interference images; and a computer for receiving the series of interference images transmitted by the image acquisition module, extracting phase information of the object light by using a phase shift algorithm, and realizing measurement of the three-dimensional appearance of the surface of the measured object.

The intelligent door lock face recognition lens comprises a supporting plate, a rotating seat, a lens assembly and a sliding plate, the rotating seat is rotatably installed on a supporting frame, the sliding plate is vertically connected with the supporting plate in a sliding mode, the lens assembly is installed on the rotating seat, and the lens assembly is connected with the sliding plate in a sliding mode. A first prism, a second prism and a third prism are fixedly installed on the supporting plate, light emitted by the lens assembly penetrates through the first prism and then is refracted upwards, the irradiation direction of the light emitted by the lens assembly penetrates through the second prism and then is kept unchanged, and the light emitted by the lens assembly penetrates through the third prism and then is refracted downwards. The intelligent door lock has the advantages that the first prism, the second prism and the third prism are switched to refract light by adjusting the pitching angles of the rotating base and the lens assembly on the supporting plate, images of the position height are collected on the fixed intelligent door lock, and the intelligent door lock can adapt to users of different heights.

The present application relates to the technical field of foundation pit measurement, and more particularly to a construction coordinate transfer method and coordinate measurement transfer system suitable for deep foundation pit; the construction coordinate transfer method comprises the following steps: preparing step: adjusting the center of the prism to be physically collinear with the steel wire rope; obtaining the coordinates of the reflecting sheet: taking the coordinates of the center of the prism in the construction coordinate system as the coordinates of the reflecting sheet on the steel wire rope corresponding to the prism in the construction coordinate system; obtaining the coordinates of the site at the bottom of the foundation pit: combining the coordinates of the reflecting sheet in the construction coordinate system, the coordinates of the site in the construction coordinate system are obtained according to the resection method, that is, the transfer of the construction coordinate from the ground to the bottom of the foundation pit is completed; without purchasing expensive special equipment such as laser plumb instrument, the construction cost is reduced, the space occupied by the support is small, the support does not need to be removed during layer-by-layer excavation, the construction process is reduced, the coordinate transfer process is relatively simple, and the precision is high.

The application discloses a wide-narrow-slit combined partitioned constant star optical radiation characteristic simulation system, which is used for simulating the optical radiation characteristic of a star. The system is composed of a continuous laser light source, a multi-element partitioned mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system. The multi-element partitioned mapping spectrum modulation system comprises a pre-collimation and expansion system and multi-size slits. The pre-collimation and expansion system expands the light beam to fill the DMD array surface, and the wide-narrow-slit combination improves the energy and spectrum modulation capacity and compensates for the modulation interference. The double-prism symmetrically placed light splitting system ensures that the light beam is parallelly incident and output. The DMD array surface is divided into p independent sub-regions for independent modulation, each sub-region corresponds to a group of wide-narrow-slit channels, the independent modulation of the star point color temperature and the star magnitude is realized, and the sub-region modulation capacity satisfies the formula n >= t / c. The multi-channel integrating sphere coupling system realizes light mixing and independent output, and the system has high precision and strong flexibility.

The present application relates to a kind of light beam pointing stability large rotation angle tuning short wave infrared coherent light source, and the present coherent light source includes: pump laser, magneto-optical isolator, condensing lens group, two 45 ° reflector, optical parametric oscillator (OPO), optical filter, fixed right-angle prism and mobile right-angle prism.The pump laser is used to generate pump light;The magneto-optical isolator is used to ensure one-way transmission of laser;The condensing lens group is used to improve beam energy density;Two 45 ° reflector is used to fold pump light path;The optical parametric oscillator is used to generate coherent short wave infrared light;The nonlinear crystal is used to adjust the output wavelength of short wave infrared light source;The optical filter is used to block remaining pump light;Fixed right-angle prism and displacement right-angle prism are used to compensate the lateral displacement of output beam caused in the process of crystal rotation.The present application compensates the lateral displacement of light beam by moving prism, realizes the position of output beam unchanged in the process of large rotation angle tuning, ensures its directionality stability, and is suitable for spectral analysis, remote sensing and imaging and other needs.

The utility model provides a five-surface detection device for a chip, and relates to the technical field of chip detection. The five-surface detection device comprises a mounting platform, a visual mechanism, four prisms and four adjusting mechanisms, the mounting platform is provided with a vertically arranged through hole, a detected chip is placed at the through hole, the visual mechanism is mounted below the mounting platform, and the visual field of the visual mechanism is aligned with the through hole so as to perform visual detection on the detected chip. Each adjusting mechanism is mounted on the mounting platform and is correspondingly connected with one prism, and each adjusting mechanism is arranged to controllably drive the prism to move in the preset direction and / or drive the prism to rotate around the side edge direction of the tested chip so as to adjust the position of the prism. Therefore, the visual mechanism obtains the image of the corresponding side edge of the tested chip through the prism. According to the technical scheme, the position of the prism can be adjusted through the visual mechanism, so that the side edge image of the detected chip can be clearly obtained, and the accuracy of appearance detection of the detected chip is improved.

The utility model discloses a prism centering rod device for rapid fixed-point survey lofting, which belongs to the field of constructional engineering construction and comprises a centering rod, a prism is mounted on the centering rod, a sighting board is mounted on the prism, a cavity is formed in the bottom of the centering rod, an extension rod is arranged in the cavity in a sliding manner, and the extension rod is connected with the centering rod. A pressing rod is fixed to the top end of the extension rod, an avoiding groove matched with the pressing rod is formed in the side wall of the centering rod, a marking pen is detachably connected to the bottom end of the extension rod, the bottom of the marking pen is sleeved with a compression spring, and a circular truncated cone abutting against the compression spring is arranged in the middle of the marking pen. According to the utility model, the lofting efficiency is improved, the time is saved, the manpower is reduced, and the measurement lofting precision is ensured.

The application discloses a kind of multicolor semiconductor laser modules with shaping beam combining prism pair, comprising: first laser light path, several mutually parallel second laser light paths and main light path, second laser light path and first laser light path are parallel, first laser light path includes first laser diode, first aspherical collimating lens, first telescope and first shaping beam combining prism pair arranged in sequence, first shaping beam combining prism pair includes first shaping prism and second shaping prism, one side of second shaping prism is provided with coating layer, coating layer is used to reflect the light beam of first laser light path and transmit the light beam of second laser light path, the light beam of first laser light path and the light beam of second laser light path are combined to form main light path, first long-focus plano-convex lens and focusing lens are sequentially arranged on main light path, and focusing lens is arranged at the light emitting position on the multicolor semiconductor laser module.The application compared with prior art, can effectively reduce the size of laser module, and increase the stability of optical path.

An imaging lens assembly (21) according to the present disclosure comprises: a prism (31) that deflects light incident from an object side and emits the light to an image side, the prism (31) being made of a resin material; and at least one lens disposed on an image side of the prism (31), in which the imaging lens assembly (21) is configured to satisfy:-1.0 lt; ((PNd-1. 75) * PNd * 100) / PVd is less than or equal to-0.56; wherein PNd is the refractive index of the prism (31), and PVd is the Abbe number of the prism (31).

According to the detection device and method, a laser emits a point light source, a light beam is collimated through a non-curved mirror, the aperture of input parallel light is controlled through a three-piece type variable beam expanding mirror group, the light beam is shaped through a shaping prism, and the light beam is reflected by a reflector after penetrating through a focusing mirror and an optical wedge, so that the light beam is formed. The method comprises the following steps: obliquely irradiating the surface of a detected target at a specified angle, acquiring a light spot effect by cameras placed at symmetrical angle positions, and performing area scanning and image acquisition processing on a wafer after adjusting the size and uniformity of light spots according to detection requirements. According to the invention, the problem of uniformity of inclined incident light spots can be solved, the size of the detected light spots can be adjusted at the same detection position, and the detection precision and the detection speed in the detection process can be flexibly controlled.

The present invention relates to the field of target detection, and in particular to an extremely low-power optical target detection method based on a neural network. The method comprises the following steps: constructing a convolutional neural network to extract target image features; normalizing the extracted target image features to obtain target samples; finding convolution kernel weights, selecting a convolutional neural network framework with the highest average recognition accuracy after training, building a learnable optical prism device and applying it to a standard target detection database, learning to obtain the convolution kernel weights of each layer, finding the threshold of the excitation layer of the convolutional neural network framework, and selecting the excitation function with the highest target position accuracy after training and testing; determining the dispersion coefficient of the optical prism and the threshold of the filter film, customizing a scattering mirror, forming a target light spot through the scattering mirror, and finally imaging through a camera. By using several layers of optical prisms of the convolutional neural network to calibrate the target frame, the method achieves high real-time efficiency and accuracy without consuming any battery energy.

An edge-emitting laser cavity surface detection jig is characterized by comprising a reflector fixed on a tray so as to enable reflected light of an edge-emitting laser on the tray to be emitted after the angle of the reflected light is changed; and the microscope is fixed on an emergent light path of the reflecting mirror and is used for carrying out appearance detection. According to the utility model, the reflecting prism can be used for detecting the appearance of the cavity surface of the edge-emitting laser in the loading tray, so that the pollution or damage risk caused in the process of taking and placing the laser in the traditional detection mode is overcome.

The present invention relates to a high-power dual-comb spectroscopy system, and also to a seed source system for a high-power dual-comb spectrometer, which is used to realize the dual-comb system of the present invention. The dual-comb spectroscopy system of the present invention includes a dual-wavelength mode-locked pulse seed source 1, a signal light wavelength division multiplexer 2, a first optical fiber amplifier 3, a second optical fiber amplifier 4, a first compressor 5, and a second compressor 6. Among them, the dual-wavelength mode-locked pulse seed source, the wavelength division multiplexer, the first amplifier 3, and the second amplifier 4 are constructed with a full polarization-maintaining optical fiber link to ensure system stability and reliability and immunity to external environmental disturbances. The first compressor 5 and the second compressor 6 are typical pulse compression devices constructed using spatial grating pairs, prism pairs, or prism pairs. The present invention realizes a femtosecond optical fiber dual-comb spectrometer system with high average power and high peak power, as well as a dual-comb seed source with a simple structure, long-term stability and reliability, immunity to environmental interference, and reproducibility; the present invention can realize a full polarization-maintaining all-fiber structure with good environmental stability, which can meet the requirements of operating in an environment outside the laboratory.

1. The name of the design product: centering rod bubble correction combination rack. 2. The use of the design product: used in the field of surveying and monitoring, for the case that the bubble on the prism centering rod cannot be centered, use the centering rod bubble correction combination rack to fix it, and then use the centering rod screwdriver to adjust and correct the bubble. 3. The design points of the design product: in the front view. 4. The picture or photo that best indicates the design points: front view.

The utility model relates to a luminosity linear detection light source, which comprises an LED light source group, a condensing lens group and a refraction prism, the condensing lens group is arranged between the LED light source group and the refraction prism, the LED light source group comprises a first LED light source group and a second LED light source group, and the first LED light source group and the second LED light source group are in linear distribution. The condensing lens group comprises a first condensing lens group and a second condensing lens group; the refraction prism comprises a first refraction prism and a second refraction prism; the first condensing lens group, the first LED light source group and the first refraction prism are correspondingly arranged, the second condensing lens group, the second LED light source group and the second refraction prism are correspondingly arranged, the first condensing lens group and the second condensing lens group are symmetrically arranged and condense light inwards, and the first refraction prism and the second refraction prism are symmetrically arranged and refract light inwards. According to the utility model, the CCD visual system is more stereoscopic when being used for photographing a product, so that the problems of 2.5 D and edge defects on the surface of a non-reflective product are solved, and the practicability is high.

The present invention relates to the technical field of tunnel deformation monitoring, and specifically to a high-precision deformation detection method, system, and device for tunnel engineering. The method obtains the emission signal intensity sequence of the infrared laser transmitter currently emitted and the reflection signal intensity sequence corresponding to the prism; obtains the dust coverage degree based on the change relationship between the emission signal intensity sequence and the reflection signal intensity sequence and the initial position of the target prism; obtains the geological deformation degree based on the initial position difference, torsion angle difference, and distance between the target prism and other prisms in its local area; obtains the actual deformation degree of the local area where the target prism is located at the current moment based on the dust coverage degree and the geological deformation degree, and detects the deformation of the tunnel engineering. The present invention obtains the actual deformation degree of the local area where each target prism is located in real time, which is conducive to accurately judging the actual deformation area in the tunnel and effectively avoiding the interference of dust on the prism surface on deformation monitoring.