4072 results about "Prism" patented technology

The invention discloses an egg surface microcrack detection system and method based on image analysis, and relates to the field of surface defect nondestructive detection.The method comprises the steps that a process identification interface module obtains a processing process identifier of an egg in real time; the multi-angle annular light source module is provided with a multi-band annular light source array comprising visible light and near-infrared LED lamp beads which are independently controlled, a polaroid group and a beam splitter prism are integrated, and visible light polarization images and near-infrared polarization images on the surfaces of the eggs are synchronously collected; the thermal excitation enhancement unit obtains a thermal infrared image; the process filtering module extracts the axial elongation of the mechanical stress microcrack after graded transportation, and calculates the mesh fractal dimension of the thermal stress microcrack after UV disinfection; the multi-modal feature fusion module generates a dual-channel crack probability graph; and the dynamic feedback control module outputs a micro-crack risk grade and adjusts the rotating speed of the objective table and the light source intensity. The method has the advantages that accurate judgment of mechanical and thermal stress cracks is realized, and curved surface reflection interference is broken through.

The invention relates to a shear-based acceleration and pressure composite sensor and an assembly method thereof, and belongs to the field of composite sensors. According to the technical scheme of the acceleration and pressure composite sensor based on the shear type structure, an acceleration detection module comprises a mass block of a regular polygon prism structure, and each side face of the mass block is provided with an acceleration sensitive ceramic piece; the pressure detection module comprises a force transmission column of a regular polygon prism structure, and each side face of the force transmission column is provided with a pressure sensitive ceramic piece, an electrode piece and an insulation block. According to the scheme, the sensitive elements of the acceleration sensor and the pressure sensor core are arranged in a polygonal mode to form a spatial three-dimensional structure, the effective area of the sensitive elements in unit volume is increased, the multiple sensitive elements act together to form superposition of pressure signals, the detection precision and sensitivity of the two are guaranteed, and the detection precision is improved. Therefore, the overall size of the composite sensor is greatly reduced on the premise that the original precision is maintained, and the composite sensor is miniaturized.

The present disclosure relates to an active graded magnetic compensation system and method for an unshielded SERF magnetometer. The system comprises: a detection laser, a half-wave plate, a magnetic field compensation coil, a magnetic field modulation coil, a non-magnetic heating assembly, an alkali-metal atomic vapor cell, a polarizing beam splitter prism, a balanced photodetector, a graded feedback control module, a pump laser, a quarter-wave plate, a focusing lens and a photodetector. By means of the present disclosure, a graded compensation system is used to realize high-precision compensation for a magnetic field within a large dynamic range in a geomagnetic environment, thereby ensuring that an instrument carries out high-sensitivity magnetic field measurement under geomagnetic conditions.

The invention discloses a melamine paper surface defect detection system based on optical detection, and relates to the technical field of industrial optical detection, and the melamine paper surface defect detection system comprises a polarized light signal generation module which employs a high color rendering index white light source to irradiate the surface of melamine paper, obtains a surface reflection light beam array carrying different polarization states, and modulates the surface reflection light beam array into eight groups of independent polarized light signals; the multispectral imaging and registering module inputs eight groups of independent polarized light signals into a free-form surface prism group and performs light splitting to generate a diffuse reflection texture image, a mirror reflection image and a near-infrared perspective image, and constructs a three-channel space registering image matrix; and the light path calibration module is used for extracting defect coordinate data and confidence score based on the pixel-level defect thermodynamic image, and performing light path compensation by adopting a real-time feedback regulation mechanism to obtain a dynamically calibrated stable optical imaging signal.

This application relates to the field of telescopes, and provides a stabilized gimbal of an erecting prism, a stabilized monocular, and stabilized binoculars. The stabilized gimbal of an erecting prism includes a prism casing, a rotation frame, an external mounting bracket, and a drive control assembly, where the drive control assembly is configured to: drive the prism casing to rotate around a first rotation shaft, and drive the rotation frame to rotate around a second rotation shaft based on deflection position information of the prism casing, deflection position information of the rotation frame, and three-dimensional rotation angular velocity information of the erecting prism.

The utility model discloses a three-color micro-projection optical system, the three-color micro-projection optical system is provided with an object side and an image side which are correspondingly arranged along an optical axis direction, the three-color micro-projection optical system comprises a diaphragm, a lens group and a color combination prism assembly which are sequentially arranged from the object side to the image side; the color combination prism assembly comprises a color combination prism, a red light-emitting chip, a green light-emitting chip and a blue light-emitting chip; the focal length of the three-color micro projection optical system is f, 5.9 mlt; flt; the thickness is 6.4 mm; the distance from the diaphragm to the image surface is the total optical length TTL and TTLlt of the three-color micro-projection optical system; and the thickness is 10.2 mm. By means of the arrangement, in the environment temperature range of 20-60 DEG C, the optical system does not defocus during working, the MTF full frequency is higher than 0.5, the total length of the optical system can be controlled within 10.2 mm, and the working performance is more stable.

The invention discloses a method and a device for measuring orthogonality of an orthogonal rotary shaft system, and belongs to the technical field of orthogonal rotary shaft system detection. The orthogonal rotary shaft system comprises a first rotary shaft system and a second rotary shaft system; the method comprises the following steps: carrying out axis inclination angle rotation error measurement and attitude fine adjustment by using a CCD (Charge Coupled Device) double-axis autocollimator, and a cubic reference prism and a double-sided optical flat which are respectively fixed with a first rotation shaft system and a second rotation shaft system; setting a reference cross line XY through the double-sided optical flat by using a second rotary shaft system; the cross curve of the reflected light beam of the cubic reference prism is overlapped with the reference cross curve XY by adjusting the mounting positions of the two rotary shaft systems; and rotating the first rotating shaft system, recording an angular deviation value and calculating an orthogonality value of the two rotating shaft systems. According to the invention, the reference drift error of mutual aiming of the two autocollimators is eliminated, the interference of the rotation error of the shaft system on orthogonality measurement is eliminated, and the precision and reliability of the orthogonality measurement of the shaft system are improved on the whole.

The invention relates to the technical field of laser ranging, in particular to a double-optical-comb hybrid ranging device which comprises a signal detection optical path system and a signal demodulation optical path system. Wherein the signal detection optical path system comprises a first optical frequency comb, a first optical isolator, a first optical collimator, a first beam splitter prism, a reference mirror, a Faraday rotator, a convergence mirror and a target reflector; the signal demodulation optical path system comprises a second optical frequency comb, a second optical isolator, a second optical collimator, a half-wave plate, a second beam splitter prism, a third beam splitter prism, a first polarization controller, a first photoelectric detector, a reflector, a polarization beam splitter prism, a second polarization controller and a second photoelectric detector. A third polarization controller; and a third photoelectric detector. According to the invention, three ranging technologies of asynchronous optical sampling ranging, multi-heterodyne interference ranging and synthetic wavelength ranging are fused, and the problem that a large ranging range and high ranging precision cannot be simultaneously considered in the ranging process is solved.

Provided are a water-soluble film capable of maintaining good mechanical strength even when packaging a liquid detergent and the like while maintaining excellent water solubility of the water-soluble film and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated for a first surface is Fd1 and a crystallinity index calculated for a second surface opposed to the first surface is Fd2 for FT-IR measurement of respective two surfaces of the water-soluble film by ATR technique using a diamond prism, the Fd1 and the Fd2 are 0.22≤Fd1≤0.72, 0.2≤Fd2≤0.65 and Fd1 / Fd2≥1.1.

The invention relates to the technical field of microscopes, in particular to an optical hinge group and a stereomicroscope, and the optical hinge group comprises a hinge seat, a first rotating body, a second rotating body and a reflection light path assembly. Wherein the back-shooting light path assembly comprises a negative lens and a positive lens group, the positive lens group is arranged between the first right-angle prism and the third right-angle prism, and the negative lens is arranged between the second right-angle prism and the third right-angle prism; by arranging the positive lens group, the aperture of a light beam is shrunk, so that the light beam can smoothly enter the first rectangular prism, and by arranging the negative lens, the aperture of the light beam is diffused, so that the light beam can fully fill the third rectangular prism, the positive lens group and the negative lens are matched to form a back-shooting light path assembly, the aperture of the light beam and an imaging azimuth angle are adjusted, and optical image stabilization is realized. The technical problems that in the prior art, an optical hinge set has large off-axis vignetting and poor imaging quality due to the fact that an optical path passes through multiple sets of prisms are solved, and the imaging quality is ensured while the observation angle is changed.

The embodiment of the invention provides an optical machine lens module and AR optical display equipment. The optical machine lens module sequentially comprises a first lens, a second lens, a third lens, a fourth lens, an X-cube color combination prism and a fifth lens from an object side to an image side along an optical axis, the first lens is an aspheric positive lens, the second lens is an aspheric positive lens, the third lens is an aspheric negative lens, the fourth lens is an aspheric positive lens, and the fifth lens is an aspheric negative lens. The total focal length F of the optical machine lens module is more than 4.1 mm and less than 4.8 mm; the focal length f1 of the first lens and the total focal length F meet the condition that f1 / F is larger than or equal to 2.3 and smaller than or equal to 2.9; and the focal length f2 of the second lens and the total focal length F meet the condition that f2 / F is greater than or equal to 2.1 and less than or equal to 2.4.

The invention provides an attitude measurement camera coordinate system calibration method, apparatus and device, and a storage medium, which can be applied to the technical field of measurement calibration. The method comprises the steps that a calibration plate is constructed, a conversion target seat and at least one reflective mark point are arranged on the calibration plate, the conversion target seat is used for placing a cube-corner prism target ball and a photogrammetry target ball, the cube-corner prism target ball and the photogrammetry target ball are the same in diameter, and the calibration plate is placed at different positions in a view field of an attitude measurement camera; the method comprises the following steps: acquiring three-dimensional coordinates of a cube-corner prism target ball by using a laser tracker, replacing a photogrammetric target ball, shooting an image of a calibration plate by using an attitude measurement camera to obtain the three-dimensional coordinates and a plurality of images of the cube-corner prism target ball in a laser tracker coordinate system, and calculating the three-dimensional coordinates of the cube-corner prism target ball according to the three-dimensional coordinates and the plurality of images of the cube-corner prism target ball in the laser tracker coordinate system. And calibrating a coordinate system of the attitude measurement camera. The extraction precision of the two-dimensional image coordinates of the target spot can be improved, and then the calibration precision of the coordinate system is improved.

The invention provides a projection lens, which sequentially comprises a first lens with positive focal power from a projection surface to an image source surface along an optical axis, a second lens with negative focal power and a third lens with positive focal power from the projection surface to the image source surface, the surface of the projection side of the second lens is a convex surface, and the surface of the image source side of the second lens is a concave surface; the surface of the projection side of the third lens is a concave surface, and the surface of the image source side of the third lens is a concave surface; the surface of the projection side of the fourth lens is a convex surface, and the surface of the image source side of the fourth lens is a convex surface; the surface of the image source side of the fifth lens is a convex surface; the surface of the projection side of the sixth lens is a convex surface; a prism; a protective glass; a piece of plate glass with changeable positions is arranged between the prism and the protective glass, and the plate glass can be located at a first position or a second position through a switching device. According to the projection lens provided by the invention, clear imaging at two different projection distances is realized through switching of the plate glass, and switching between a close shot and a long shot is completed.

The invention discloses an automatic optical prism optical axis parallelism adjusting method based on image processing, and relates to the technical field of high-end equipment optical detection. According to the scheme, a prism reflection image sequence is collected based on a calibration light source, an optical axis projection coordinate system is established, light spot geometric centroid and boundary parameters are extracted, and an optical axis direction vector matrix is constructed; calculating an optical axis included angle deviation according to the multi-frame image, and establishing an optical axis parallelism parameter model; decomposing the error distribution matrix through an iterative minimum deviation method to obtain attitude bias and system aberration components, and generating a prism attitude adjustment vector to realize closed-loop automatic adjustment; according to the invention, high-precision and self-adaptive adjustment of the optical axis parallelism can be realized under the conditions of complex illumination and device batch fluctuation, and the stability, consistency and automation level of optical system installation and adjustment are improved.

An electronic device may include a waveguide with an input coupler and an output coupler. The input coupler may receive the image light from imaging optics. The input coupler may be an input coupling prism and the imaging optics may include lens elements. World light may be viewable at an eye box through the output coupler. Biasing, compensation, and / or prescription lenses may overlap the output coupler. The input coupling prism, the lens elements in the imaging optics, and / or one or more of the biasing, compensation, and prescription lenses may be formed from gradient index (GRIN) material. The GRIN material may have a gradient refractive index that varies in one or more gradient directions. Use of GRIN materials may minimize the volume required to form the device without sacrificing optical performance. In addition, the GRIN materials may compensate for dispersion and aberrations in the device.

A vehicle lamp includes a light source, and a lens. The lens includes a central region centered on an optical axis of the lamp and a peripheral region located around the central region. A rear surface of the peripheral region is formed with plural total reflection prism elements which reflects light emitted from the light source toward the front of the vehicle lamp in a state of being aligned in a concentric circular form centered on the optical axis. The rear surface of the peripheral region includes an inner periphery-side region and an outer periphery-side region. The plurality of total reflection prism elements form a first annular concave curved surface centered on the optical axis as an envelope surface in the inner periphery-side region and form a second annular concave curved surface centered on the optical axis as an envelope surface in the outer periphery-side region.

The invention discloses a temperature-controllable laser heating device and method, and relates to the technical field of laser heating, and the device comprises a laser generator which is used for generating a laser beam for heating; the triangular prism assembly is arranged on the same side of the laser generator and the detection control module and is used for refracting the laser beams to irradiate the power equipment for heating and refracting infrared radiation generated by the power equipment to irradiate the detection control module; the detection control module is used for detecting the infrared radiation so as to obtain the actual temperature of the heating point of the power equipment, and adjusting the output power of the laser generator based on the actual temperature and the preset temperature so as to control the deviation between the preset temperature and the actual temperature; the laser beam is refracted to irradiate the power equipment for heating, the actual temperature of the heating point is obtained, the output power of the laser generator is adjusted based on the actual temperature and the preset temperature, the device can be used without modification, and the problems of randomness of training content and concealment of examination content are solved.

The invention relates to the technical field of optical wireless communication, in particular to an optical wireless communication device and method based on beam shaping, and the device comprises a beam shaping module which comprises at least one beam shaping lens so as to convert a beam outputted by a point light source into a uniformly distributed linear or planar light field; the optical transceiver module comprises a plurality of optical base stations, the optical base stations are arranged in a redundant mode in the extension direction of the communication scene, each optical base station integrates at least one optical transmitter, an optical detector and a plurality of prisms and is used for transmitting and receiving optical signals, and the coverage range of the single optical base station is expanded through the prisms; and the dynamic demodulation module is connected with the optical detector, and dynamically adjusts the demodulation threshold value of the corresponding bit error rate according to the real-time channel state. Therefore, when the technology is applied to wireless optical communication, the communication performance can be improved, the coverage distance can be increased, the coverage uniformity can be improved, the bit error rate can be reduced, the construction cost can be reduced, and the long-term stable communication requirement of a closed scene can be met.

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.

A display selection button 10 comprises a light projecting unit 21, a light guide plate 13, a light receiving units 22, a control unit 30, and a printed sheet 14 and a LED 25. The light guide plate 13 has an incident surface 13a to which the light emitted from the light projecting unit 21 is incident, a plurality of prisms 13d that reflect incident light toward the side approaching or touching a finger and are provided at positions corresponding to push buttons 10c, and an exit surface 13b that emits the light reflected in the direction in which the finger approaches. The light receiving units 22 receive light emitted from the exit surface 13b and reflected from a finger. The control unit 30 detects the approach of a finger depending on the amount of light received by the light receiving units 22. The printed sheet 14 displays the desired numerals. The LED 25 emits light for displaying the desired numerals in the printed sheet 14.

The utility model discloses a chip defect multi-face detection device which comprises a detection shell, a display mechanism used for chip multi-face display is installed on the detection shell, a camera is installed in the detection shell, and an adjusting mechanism used for driving the camera to adjust the size of a light spot in the detection shell is further installed on the detection shell. According to the utility model, through the cooperation of the rectangular prism module, the surface light source, the beam splitter prism and the mesopore surface light source, the four rectangular prisms are closed together to form a square chamber, and the chip is placed in the square chamber, so that a camera can detect the front surface and four side surfaces of the chip at the same time; through the arranged adjusting mechanism, the product is small, a telecentric lens needs to be used, and the working distance of the telecentric lens is relatively fixed, so that in order to facilitate focusing, the device is provided with the focusing adjusting mechanism, the position of the telecentric lens can be adjusted through a knob, and a shot picture can be clearly displayed.

An optical detection device, comprising an objective lens, a bright field illumination unit and a dark field illumination unit. The objective lens is provided with a bright field light channel and a dark field light channel. The bright field illumination unit comprises a bright field beam splitting unit and a bright field light source for providing a bright field incident light beam, wherein the bright field incident light beam is reflected by the bright field beam splitting unit and then enters the bright field light channel. The dark field illumination unit comprises a dark field light source for emitting a dark field incident light beam, a prism module and a dark field beam splitting unit; the prism module and the dark field beam splitting unit are sequentially arranged in the transmission direction of the dark field incident light beam; the prism module is used for converting the dark field incident light beam into a circular light beam, wherein the circular light beam is reflected by the dark field beam splitting unit and then enters the dark field light channel; and the dark field beam splitting unit comprises a circular beam splitter and an aperture formed at the center of the circular beam splitter, wherein the aperture is located on the transmission path of the bright field incident light beam. The present invention more conveniently realizes switching between bright field detection and dark field detection, thereby improving the detection efficiency.

The invention provides a projection lens, which sequentially comprises a first lens with positive focal power from a projection surface to an image source surface along an optical axis, a second lens with negative focal power and a third lens with positive focal power from the projection surface to the image source surface, the surface of the projection side of the second lens is a convex surface, and the surface of the image source side of the second lens is a concave surface; the surface of the projection side of the third lens is a concave surface, and the surface of the image source side of the third lens is a convex surface; the surface of the projection side of the fourth lens is a concave surface; the surface of the projection side of the fifth lens is a concave surface, and the surface of the image source side of the fifth lens is a convex surface; the surface of the projection side of the sixth lens is a convex surface, and the surface of the image source side of the sixth lens is a convex surface; a prism; a protective glass; plate glass is arranged between the prism and the protective glass, and the plate glass can be located at a first position or a second position through a switching device. According to the projection lens provided by the invention, clear imaging at two different projection distances is realized through switching of the plate glass, and switching between a close shot and a long shot is completed.

The invention discloses a follow-up PIV boundary layer flow field test system and test method based on electrolytic hydrogen bubbles. The follow-up PIV boundary layer flow field test system comprises an integrated optical measurement module and a tracer particle generation module, the optical measurement module is arranged in the UUV and comprises a laser transmitter assembly, a sapphire prism and two imaging cameras which are symmetrically arranged, and laser sheet light forms a sheet light area on the outer surface of the UUV after being refracted by the sapphire prism; the tracer particle generation module comprises a cathode, an anode and a power supply unit, the cathode is a platinum wire array composed of a plurality of platinum wires arranged in the axial direction of the UUV, and the platinum wires are located at different heights away from the wall face of the UUV; the power supply unit selectively electrifies the platinum wire, independently adjusts the voltage, controls the number and frequency of generated hydrogen bubbles, and achieves the synchronous measurement of flow field information at different thickness positions of a boundary layer. According to the invention, boundary layer flow field in-situ follow-up measurement and synchronous fine measurement of different thickness positions under the condition of not changing the UUV shape are realized, and the device has the advantages of high integration level, small flow field disturbance, high measurement efficiency and the like.

The invention discloses a projection display system and near-to-eye display equipment. The projection display system comprises a beam splitter prism, a display element and an imaging assembly. The beam splitter prism is matched with a reflector, a field lens and a single lens in the imaging assembly, and light in the projection display system is turned. Light emitted by the display element enters the beam splitter prism after passing through the field lens and is transmitted to the reflector by the beam splitter prism, the reflector reflects the light, and the reflected light enters the beam splitter prism again, is reflected to the single lens by the beam splitter prism and then is emitted from the light emitting side of the projection display system. Therefore, the imaging light path is compressed, the size of the projection display system is effectively reduced, and the miniaturization of the projection display system is realized.

The invention belongs to the technical field of laser spot positioning, and discloses a method and a device for extracting a spot centroid of a four-quadrant detector. A first linearly polarized light beam and a second linearly polarized light beam which are consistent in wavelength and orthogonal in polarization are generated through an emission optical system, the two linearly polarized light beams are modulated, different modulation frequencies are given to the two linearly polarized light beams, and the two linearly polarized light beams are combined into one beam of composite light to be emitted; receiving the composite light by using a receiving optical system; separating the composite light into first linearly polarized light and second linearly polarized light by using a polarization bifocus prism, and enabling the two beams of light to respectively form focuses which are staggered front and back; a four-quadrant detector is used for receiving a pre-focus light spot and a post-focus light spot, and the four-quadrant detector is arranged at the middle position of the two focuses; a signal processing system is used for processing signals output by the four-quadrant detector, and light spot centroid information is obtained through calculation. According to the invention, the weak signal detection efficiency of the four-quadrant detector is improved, and the precision of light spot position calculation is improved.

The invention provides a contact lens with peripheral defocus, and relates to the technical field of optical lenses, the lens comprises a contact optimization core area, a partitioned progressive microprism array area and a dynamic light scattering area, and the specific setting is as follows: the contact optimization core area is located at the geometric center of the lens, the outward extension radius is 1.8-2.2 mm, and the contact optimization core area provides clear central vision; according to the intelligent self-adaptive contact lens, the intelligent self-adaptive contact lens is characterized in that the intelligent self-adaptive contact lens comprises a contact optimization core area and a partition progressive microprism array area, the partition progressive microprism array area is located on the outer side of the contact optimization core area and surrounds the contact optimization core area in a concentric ring shape, and through collaborative design of the partition progressive microprism array area and the dynamic light scattering area, the real-time monitoring and dynamic adjusting capacity of a photoelectric feedback control module is combined; the problem that an optical structure of an existing product lacks dynamic adaptability is effectively solved, and the optical structure can be changed according to different illumination environments and wearing duration.

The utility model relates to a 4K fluorescent endoscope optical system, which comprises an objective lens system, a relay lens system and an eyepiece system which are sequentially arranged along the light propagation direction, and is characterized in that the objective lens system is of a reverse long-distance structure; the system comprises a sapphire protection lens, a negative focal power lens, a prism or a steering prism, a positive focal power plano-convex cemented lens, a positive focal power triple cemented lens and a first positive focal power double cemented lens which are arranged along a light propagation direction, the relay lens system comprises n relay lens groups, and each relay lens group is of a double telecentric structure. And the eyepiece system is arranged in the light transmission direction and is formed by symmetrically arranging two doublet rod lenses, n is an odd number, the eyepiece system is of an object space telecentric structure, and the eyepiece system comprises a second positive-focal-power doublet lens, a positive-focal-power lens and a sapphire lens which are glued into a whole in the light transmission direction. The structure of an optical system can be simplified, production and processing cost can be reduced, and 4K ultra-high-definition fluorescent laparoscopic imaging can be realized at the same time.

The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having negative refractive power; a prism having an incident surface, a reflecting surface, and an exit surface, and an angle between the reflecting surface and the optical axis being 45°; a stop; a second lens having positive refractive power; a third lens having refractive power; a fourth lens having positive refractive power; and a fifth lens having negative refractive power.

The invention relates to a composite microprism reflective film with three triangular pyramid structures and a manufacturing method of a mold of the composite microprism reflective film, and is characterized in that the surface of the microprism reflective film is formed by an array of identical parallelogram unit bodies, and each parallelogram unit body is composed of two identical triangular pyramids A, four mixed triangular pyramids B and two mixed triangular pyramids C, the bottom surfaces of the triangular pyramids A, the mixed triangular pyramids B and the mixed triangular pyramids C are the same equilateral triangles, the inclination angles of the three pyramid surfaces of each triangular pyramid A are alpha / 2, the inclination angles of the pyramid surfaces of the mixed triangular pyramids B are alpha / 2, alpha / 2 and beta / 2, and the inclination angles of the three pyramid surfaces of the mixed triangular pyramids C are alpha / 2, beta / 2 and beta / 2 respectively; the area ratio of the triangular pyramid A to the triangular pyramid B to the triangular pyramid C is 1: 2: 1, and the performance under different application conditions can be reasonably optimized, so that the wide-angle performance can be improved, and the optimization and balance of the overall comprehensive performance can be realized.