Fresnel telescope imaging laser radar

The invention discloses a Fresnel telescope imaging laser radar, which comprises a laser, a transmitting polarization beam splitter, a first channel space phase modulator, a second channel space phase modulator, a transmitting polarization beam combiner, a laser amplifier, a transmitter-telescope, an optical beam scanner, a receiver-telescope, a receiving polarization beam splitter, a 2*4 90-degree space optical hybrid, an A-path balanced receiver and an A-path amplification and analog to digital converter, a B-path balanced receiver and a B-path amplification and analog to digital converter, a pluralizing device, a time and space coordinate converter, a resampling interpolation space coordinate converter, a matching filter and a control computer. The Fresnel telescope imaging laser radar can realize two-dimensional imaging of a target in a super optical resolution limit, improves the receiving sensitivity and imaging signal-to-noise ratio, greatly increases receiving optical aperture and ...

Visual on -vehicle machine of talkbacking of building

The utility model provides a visual on -vehicle machine of talkbacking of building is connected through believing the visual gate machine of talkbacking of platform and building a little, the lock is drawn together to the visual gate press packed bale of talkbacking of building, visual on -vehicle machine of talkbacking of building includes: sound frequency encoding and decoding module, orientation module, man -machine interaction module, believe communication module a little, believe a little among the communication module including with believe little letter communication interface of platform communication a little, through believe communication interface a little believe a little that communication module will voice data and control signal send to believe platform or follow a little believe the platform a little and receive the voice data. The utility model provides a visual on -vehicle machine of talkbacking of building can also be based on little letter communication module from believing ...

Plate lens with variable light refractive index

Multilayer body grating pulse laser shaping device and method

The invention relates to multilayer grating pulse laser shaping device and method. The device comprises a multilayer grating, a polarizer and analyzers, wherein the multilayer grating is recorded into a holographic material and spatially spaced; the polarizer is placed in the incident direction of a pulse laser beam to be shaped; and the analyzers are respectively placed in the transmitting pulse laser beam direction and the diffraction pulse laser beam direction. By utilizing the diffraction action of the multilayer grating on the pulse laser beam to be shaped, the characteristic parameters such as layer number, thickness, grating period, and the like of the multilayer grating are properly adjusted to control the bandwidth and the waveform of the pulse laser beam. Compared with the prior art, the invention has wider shaping range on the input pulse laser beam and a plurality of characteristic parameters of the optional multilayer grating and is convenient for the optimization of a pulse ...

Wechat building video intercom door machine

The invention provides a Wechat building video intercom door machine which comprises a master control module, an audio encoding and decoding module, a video coding and decoding module, an audio and video synchronization module, a Wechat communication module, a door control module and a man-machine interaction module. The audio encoding and decoding module comprises an echo eliminating module and a noise eliminating module. The Wechat communication module comprises a Wechat communication interface communicating with a Wechat platform. The Wechat communication module sends video data or audio data to the Wechat platform through the Wechat communication interface or receives audio data and control signals from the Wechat platform. The Wechat building video intercom door machine can solve the problems that a LAN or Internet building video intercom system which is set up in a traditional mode is poor in stability and high in development cost, and a terminal machine of a video intercom system ...

Polarizing beam-splitting birefringence space light bridge

The invention relates to a polarizing beam-splitting birefringence space light bridge, which is characterized by consisting of a first 1/8 wave plate, a second 1/8 wave plate, a polarizing beam splitter, a first birefringence optical flat and a second birefringence optical flat, wherein the first 1/8 wave plate, a first incident face of the polarizing beam splitter, a first emergent face and the first birefringence optical flat are arranged in turn along the advancing direction of a first light beam; the second 1/8 wave plate, a second incident face of the polarizing beam splitter, a second emergent face and the second birefringence optical flat are arranged in turn along the advancing direction of a second light beam; and the main cross section of the first birefringence optical flat is parallel to the main cross section of the first 1/8 wave plate, and the main cross section of the second birefringence optical flat is parallel to the main cross section of the second 1/8 wave plate. The ...

Satellite laser communication compound axis light tracking device and control method thereof

A satellite laser communication compound axis light tracking device and a control method thereof are disclosed, which are mainly used for satellite laser communication terminal collimation and capture and high precision large scale tracking of a tracking system. The device adopts a compound axis system by combining a coarse tracking system and a fine tracking system, and a control method of the coarse tracking system unloading the fine tracking system. The coarse tracking system adopts a unique rotary biprism structure and has the characteristic of scanning with higher precision in a larger angel range. A capture tracking sensor adopts single CMOS sensor to carry out ternary form window with changeable view field and changeable sampling rate, and a communication tracking detector adopts a 4-quadrant detector. The invention adopts the low bandwidth rotary biprism coarse tracking system and the high bandwidth fine tracking system to carry out dynamic and self-adaptive bandwidth match to realize ...

Direfraction filter spectrum gain equalizer and its manufacturing method

A bireflection filtering spectrum equalizer and its manufacturing method are disclosed. The structure of equalizer is that along the light passing are input optical fiber, the first gradient refractive index lens, the first beam splitter, phase delayer , the second beam phase the second gradient refractive index lens and output optical fiber. The manufacturing method includes the following steps: width of the thinnest crystal plate is concluded in accordance with the wave shape frequency range of filtering needed; the width and assembling angle of each crystal plate is calculates, in accordance with which each crystal plate is installed to become a birefringence filtering spectrum equalizer. The advantages are simple structure and good effect of filtering.

Two dimensional laser array phase locking and diameter aperture filling device

The invention relates to a locking phase and aperture filling device of a two-dimensional optical fiber laser array, which consists of a holophote, a two-dimensional single-mode optical fiber array, a pumping source, a phase compensating plate and a partially reflecting/outputting mirror, wherein the holophote, the partially reflecting/outputting mirror and the holophote, the partially reflecting/outputting mirror as well as the two-dimensional single-mode optical fiber array and the phase compensating plate which are positioned in the partially reflecting/outputting mirror satisfy the Talbot self-imaging condition to form a Lau effect resonant cavity. The invention has the advantages of simple structure, stable and reliable performance, continuous output with high power and the like, is particularly suitable for the fields of laser radar, satellite laser communication, directed energy weapon and other fields, and has actual significance for developing a compact and light laser system with ...

Method for rapidly characterizing silicone rubber compound storage life

The invention relates to a method for rapidly characterizing the silicone rubber compound storage life. The method comprises the following steps: (1) plasticity measurement: using a parallel plate method to measure the plasticity and recovery value of a rubber material according to the GB/T12828-2006 plasticity and recovery value measurement requirements of raw rubber and unvulcanized rubber compound; (2) high temperature accelerated structuring tests: open-milling 200 grams of rubber compound in an open mill with a roller distance of 3 mm until the rubber compound is evenly mixed, then placing the rubber compound in a temperature-constant drying oven with a temperature of 200 DEG C, taking out the rubber compound after 2.5 hours, open-milling the rubber compound on an open mill with a roller distance of 3 mm so as to obtain smooth rubber materials without any rough edge, wherein the frequency that the roller is wrapped in the open mill is defined as the structuring frequency. The rubber ...

Universal optical antenna of synthetic aperture laser imaging radar

The invention provides a universal synthetic aperture laser imaging radar optical antenna for transmitting and receiving a distant-field or near-field optical signal for the same synthetic aperture laser imaging radar system. The antenna transmits and receives a primary telescope by a bidirectional loop, wherein the bidirectional loop consists of a transmitting channel of an adjustable secondary telescope structure and a receiving channel of an erecting telescope structure, and is connected with a laser light source, a photoelectric detector and the primary telescope; the position of a primary mirror of the secondary telescope in the transmitting channel can be moved; erecting system defocusing is arranged in the receiving channel; and a variable aperture light diaphragm is arranged in front of the photoelectric detector. The universal synthetic aperture laser imaging radar optical antenna can realize a laser transmitting wave surface with different curvature radiuses additively offset ...

Coherent array laser inverse Dammann grating beam-combining aperture filling device

The invention relates to a coherent array laser inverse Dammann grating beam-combining aperture filling device, which consists of coherent laser arrays with the same optical axis, a spectral distribution phase plate, a Fourier transformation lens and an inverse Dammann grating in turn, wherein the spectral distribution phase plate and the inverse Dammann grating are placed on an object plane and a spectrum plane of the Fourier transformation lens respectively. The filling device can combine array coherent laser light and fill the laser light into a single light beam to achieve the aim of greatly improving the output power of a laser and the light beam quality, has the characteristics of simple structure and principle, and stable and reliable performance, can control the size of output light beams and the width of far-field light beams, can be widely applied in correlative fields requiring high-power laser emission sources, is particularly applied in the fields of laser radars, laser weapons ...

Space pattern scanning laser communication method

The invention discloses a free spatial pattern scanning laser communication method, and consists of the following steps: firstly, a laser communication transmitting terminal carries the coarse collimation on the preset orbit direction of a laser communication receiving terminal that moves in a relative way; the laser communication transmitting terminal produces a modulated light beam with the information to be sent, and projects an extended light beam in a certain direction or angle to the orbit space where the laser communication receiving terminal is arranged to form spatial optical intensity patterns with information modulation; the laser communication receiving terminal movably scans and demodulates the spatial optical intensity patterns to obtain the time signal for the transmission of information and to realize laser communication. The method has reliable principle, simple structure and confidentiality without a collimation, catching and tracking structure.

Compounding process for environment-friendly flame-retardant silicone rubber

The invention relates to a compounding process for environment-friendly flame-retardant silicone rubber. The process comprises the following steps: (1) adding white carbon black, a structure controlling agent and a release agent into raw rubber, carrying out kneading and banburying in a kneader, then carrying out mixing and discharging at a high temperature, carrying out open milling and roller coating on an open mill and then carrying out normal temperature cooling so as to obtain a rubber compound A; (2) adding aluminum hydroxide and magnesium hydroxide into double-head raw rubber, then adding a silane coupling agent and the release agent, carrying out kneading in the kneader, then carrying out mixing and discharging at a high temperature after standing for 24 h, carrying out open milling and roller coating on the open mill and then carrying out normal temperature cooling so as to obtain a rubber compound B; and (3) uniformly blending the rubber compound A and the rubber compound B in ...

Satellite laser communication composite tracking and pointing vibration suppression device and control method

The invention discloses a time-sharing compensation-based satellite laser communication composite tracking and pointing vibration suppression device and a control method. The device comprises a satellite platform and a satellite laser tracking and pointing system, wherein the satellite laser tracking and pointing system comprises a rough tracking and pointing system, a telescope system, a fine tracking and pointing system, a first transflective lens, a second transflective lens, a transflective lens, an acquisition and tracking sensor, a communication tracking sensor and a signal receiver. The system is characterized in that: a signal judgment device is also arranged between the satellite platform and the satellite laser tracking and pointing system; the signal decision device judges a dither signal of the satellite platform and triggers the fine tracking and pointing system to perform complementary tracking and pointing through a corresponding trigger switch according to the judgment result ...

Phase-controllable birefringence space light bridge

The invention relates to a phase-controllable birefringence space light bridge, which uses a combined birefringence optical flat to achieve light splitting synthesis of two input light beams, wherein a quarter-wave plate performs phase-shift control and is used for space compounding of a laser communication signal light beam and a local oscillation laser beam in a coherent optical communication receiver and outputting four paths of synthesized light beams with a required phase-shift relation so as to achieve 2*4 space light bridging. The quarter-wave plate makes two perpendicular polarized components generate 90-degree phase shift, and the phase difference between the two components can be changed by rotating the optical axis direction so as to compensate phase errors generated by errors of processing, assembling, calibration and the like, thus the phase-controllable birefringence space light bridge has the advantages of simple structure, stable performance and controllable phase. The phase-controllable ...

Device and method for measuring laser frequency change

A device and a method for measuring laser frequency change are disclosed. The device is composed of a parallel panel, a phase delay parallel panel, a first cutting panel, a second cutting panel, an output parallel panel, a photoelectric detector linear array and a signal processing system. The device of the invention can measure laser frequency variable in real time.

Process for manufacturing novel carpet

The invention relates to a process for manufacturing a novel carpet, which comprises that: a, a computer designs desired layout; b, a carving machine or a lettering machine is connected to carve a template; c, the manufactured template is put on the carpets with different dimensions; and needed colored liquid filled in a spray gun is sprayed to form various color letters or patterns; d, after various sprayed color letters or patterns are dried, elastic colorless paint filled in the spray gun is sprayed once so as to protect the surface of the carpet; and e, airing and packaging are performed. The letters and patterns on the surface of the carpet are smooth, and people feel comfortable when stepping on the carpet; and the carpet has low manufacturing cost, is convenient to manufacture various pictures and texts and has attractive appearance and corrosion resistance.

Polarizing beam-splitting birefringence space light bridge

The invention relates to a polarizing beam-splitting birefringence space light bridge, which is characterized by consisting of a first 1/8 wave plate, a second 1/8 wave plate, a polarizing beam splitter, a first birefringence optical flat and a second birefringence optical flat, wherein the first 1/8 wave plate, a first incident face of the polarizing beam splitter, a first emergent face and the first birefringence optical flat are arranged in turn along the advancing direction of a first light beam; the second 1/8 wave plate, a second incident face of the polarizing beam splitter, a second emergent face and the second birefringence optical flat are arranged in turn along the advancing direction of a second light beam; and the main cross section of the first birefringence optical flat is parallel to the main cross section of the first 1/8 wave plate, and the main cross section of the second birefringence optical flat is parallel to the main cross section of the second 1/8 wave plate. The ...

Device and method for measuring laser frequency change

A device and a method for measuring laser frequency change are disclosed. The device is composed of a parallel panel, a phase delay parallel panel, a first cutting panel, a second cutting panel, an output parallel panel, a photoelectric detector linear array and a signal processing system. The device of the invention can measure laser frequency variable in real time.

Space pattern scanning laser communication method

The invention discloses a free spatial pattern scanning laser communication method, and consists of the following steps: firstly, a laser communication transmitting terminal carries the coarse collimation on the preset orbit direction of a laser communication receiving terminal that moves in a relative way; the laser communication transmitting terminal produces a modulated light beam with the information to be sent, and projects an extended light beam in a certain direction or angle to the orbit space where the laser communication receiving terminal is arranged to form spatial optical intensity patterns with information modulation; the laser communication receiving terminal movably scans and demodulates the spatial optical intensity patterns to obtain the time signal for the transmission of information and to realize laser communication. The method has reliable principle, simple structure and confidentiality without a collimation, catching and tracking structure.

Integrated and modular electro-optical control laser beam scanner

The invention relates to an integrated and modular electro-optical control laser beam scanner which consists of optical solid-state modules comprising a plurality of scanning subsystems with similar structures through cascade connection. An electro-optical switch unit and a beam splitter unit in each level of scanning subsystem are respectively integrated within a single crystal flat plate. The invention has the characteristics of high response speed, simple and compact structure, strong antijamming capability, stable and reliable performance and easy installation and calibration, and the engineered application of a space far-field light beam scanning system is realized more easily.

WeChat building video intercom system and communication method thereof

The invention provides a WeChat building video intercom system. The WeChat building video intercom system comprises a building video intercom gate machine, a building video intercom terminal and a WeChat platform. The building video intercom gate machine and the building video intercom terminal are respectively connected with the WeChat platform through a network. The building video intercom gate machine and the building video intercom terminal each comprises a WeChat communication module in communication with the WeChat platform, and the WeChat communication module performs two-way communication with the WeChat platform through a WeChat communication interface and receives or sends video data, audio data and control signals. In addition, the invention provides a communication method of the WeChat building video intercom system. The system can send the video and audio data acquired by the building video intercom gate machine to the WeChat platform, meanwhile the WeChat platform can send ...

Lidar double-way optical transmission simulation and range performance detecting device

A detection device of simulation and ranging character for the lidar double-pass optical transmission is used to detect the double-pass transmission and ranging character of the lidar signal in far room. The device includes the detected lidar, the first light beam transmission simulator, the diffusing screen, the second light beam transmission simulator, the attenuator, the zooming converging lens and the electrophotonic detector. The device of invention is about several decameters and the simulating test can be finished in library. The invention has the simple structure and reliable principle.

Electric-control phase-shift crystal birefringence free space optical bridge

The invention relates to an electric-control phase-shift crystal birefringence free space optical bridge, which consists of four crystal birefringence optical flats with same structures, a bias-detecting crystal birefringence optical flat, and an electric-control phase-shift 2*2 array. The optical bridge has the advantages of simple and compact structure, stable and reliable performance, less loss and the like. The electric-control phase-shift crystal birefringence free space optical bridge is particularly applicable to free space laser coherent communication, and has practical meaning for a satellite-borne laser communication terminal to achieve miniaturization, light weight, low power consumption and high code rate.

Universal optical antenna of synthetic aperture laser imaging radar

The invention provides a universal synthetic aperture laser imaging radar optical antenna for transmitting and receiving a distant-field or near-field optical signal for the same synthetic aperture laser imaging radar system. The antenna transmits and receives a primary telescope by a bidirectional loop, wherein the bidirectional loop consists of a transmitting channel of an adjustable secondary telescope structure and a receiving channel of an erecting telescope structure, and is connected with a laser light source, a photoelectric detector and the primary telescope; the position of a primary mirror of the secondary telescope in the transmitting channel can be moved; erecting system defocusing is arranged in the receiving channel; and a variable aperture light diaphragm is arranged in front of the photoelectric detector. The universal synthetic aperture laser imaging radar optical antenna can realize a laser transmitting wave surface with different curvature radiuses additively offset ...

Tunable ring cavity laser pulse filter shaping device

The invention discloses a tunable ring cavity laser pulse filter shaping device, which comprises at least four local volume holographic gratings and corresponding position controllers, a polarizer, a deflection rotation device, an analyzer, a pulse measurement instrument and a total control computer, and relates to the technical field of laser pulse filter shaping. Through increasing the number of local volume holographic gratings or precisely adjusting the distance between local volume holographic gratings inside the ring cavity, tunable filter shaping on the laser pulse can be realized. The device of the invention has the advantages that the structure is simple, integration is easy, solid technical and material foundations are laid for the laser pulse filter shaping technology, and rich ultra-short laser pulse spectrum and high resolution, and a wide market prospect is provided for application in optical communication and optical signal processing.

Plate lens with variable light refractive index

The plate lens is applicable to laser collimation, transmission, receiving and scanning in the laser communication, radar and laser counterwork. The volume holographic grating with variable refractive index is generated and recorded when two orthogonal spatially coherent lights meet in the crystal plate. That is the transverse traveling volume holographic grating lens is formed. Then, ultravioletlight is utilized to carry out local full light fixation. When irradiating the lens, the light generates the transverse traveling, and focusing or the input light spot generates tranverse traveling collimation. Comparing with the prior art, the invention features small volume, the reliable simple structure, the strong interference killing features as well as good selectivity of wavelength and visual field and high diffraction efficiency.

Bi-terminal bidirectional distant transmission simulation of satellite laser communication and gourd detection apparatus

Disclosed is a bidirectional long distance transmission simulation for two terminals in a laser satellite communication system and the ground testing device thereof. The device uses space dual channel structure to realize the independent positive and reverse direction bidirectional transmission of a laser beam, uses Fourier lens with long focal length to realize the optic Fourier far field transformation, uses a 4-f optic imaging amplifier with multi-level concatenated center sampling to simulate the long distance transmission of the optic field, and uses a scanning two-facet reflective mirror to realize the principle of reverse scanning with the same angle of the dual channels in the optic path to simulate the relative motion between satellites. The bidirectional long distance transmission simulation for two terminals in a laser satellite communication system of the invention can realize the laser beam transformation from the near field distribution to the far field distribution at the ...

Method for generating ultra-strong and ultra-fast pulse light spring

The invention discloses a method for generating an ultra-strong and ultra-fast pulsed light spring, and relates to the technical field of ultra-strong and ultra-fast pulsed light regulation and control. According to the method, a 4f system is formed by ultra-strong and ultra-fast femtosecond pulse laser 1, a first blazed grating 2, a first off-axis parabolic mirror 3, a vortex array 4, a second blazed grating 5, a second off-axis parabolic mirror 6 and a strong field light spring 7; the ultrastrong and ultrafast femtosecond pulse laser 1 is subjected to first Fourier transform through the first blazed grating 2 and the first off-axis parabolic mirror 3; and the vortex array 4, the second blazed grating 5 and the second off-axis parabolic mirror 6 are subjected to secondary Fourier transform to generate a strong-field light spring 7. The method is based on the classical theory, the experiment difficulty is low, the vortex phase plate is easy to prepare, dispersion in the production process ...

Satellite laser communication compound axis light tracking device and control method thereof

A satellite laser communication compound axis light tracking device and a control method thereof are disclosed, which are mainly used for satellite laser communication terminal collimation and capture and high precision large scale tracking of a tracking system. The device adopts a compound axis system by combining a coarse tracking system and a fine tracking system, and a control method of the coarse tracking system unloading the fine tracking system. The coarse tracking system adopts a unique rotary biprism structure and has the characteristic of scanning with higher precision in a larger angel range. A capture tracking sensor adopts single CMOS sensor to carry out ternary form window with changeable view field and changeable sampling rate, and a communication tracking detector adopts a4-quadrant detector. The invention adopts the low bandwidth rotary biprism coarse tracking system and the high bandwidth fine tracking system to carry out dynamic and self-adaptive bandwidth match torealize ...

Laser coherent data transmission channel simulation testing device

A laser coherent data transmission channel simulation testing device is characterized by realizing long-distance full-physical simulated laser transmission by adopting the principles of optical Fourier far-field transform realized by a long-focus Fourier transform primary mirror and cascaded central sampling 4-f optical imaging amplifying and scaling down, carrying out coherent detection after synthesizing the signal light emitted by a tested laser communication terminal and the local oscillator laser by adopting a free space 2*4 optical 90-degree bridge, realizing test of the communication performance of a coherent laser communication terminal and simultaneously testing the laser tracking and pointing performance of the laser communication terminal. The device adopts integrated design and modular assembly technologies and has the characteristics of simple structure and strong expandability.

Digital optical scanner of electro-optical switch array

A digital optical scanner of an electro-optical switch array comprises an electro-optical crystal switch, a polarization beam splitter and a prism array, wherein the single electro-optical switch and the single polarization beam splitter form a single-stage near-field scanning unit; and a multi-stage near-field scanning unit forms a near-field optical scanning array according to a certain topological structure, and then the prism array is added so as to lead the light beam to generate a corresponding deflection, thus forming a far-field optical scanning array. The scanner has the characteristics of quick response, fast scanning speed, flexible space scanning modes and high integration level, and is applicable to the fields of space laser scanning and laser radars.

Target optical image encryption method based on optical scanning images

The invention provides a target optical image encryption method based on optical scanning images, and relates to the technical field of optical image encryption. The method specifically comprises the steps that a two-dimensional scanning invisible Fresnel wave zone plate light spot which is formed by two coaxial and concentric polarization orthogonal spherical waves is projected to the target, through combination with a phase password plate, two-dimensional scanning is conducted on the target, in the scanning process at each time, the target is encoded into an encrypted invisible Fresnel wave zone plate light spot, meanwhile, encrypted signals are transmitted out through an optical transmission antenna, at the same time, an optical receiving antenna receives the encryption signals of the target through coherent reception of a space optical bridge and a balanced detector, under the action of synchronous scanning decryption keys, a target image reappears finally through a matched filter, ...

Electro-optical control two-dimensional laser beam scanning array

The invention provides an electro-optical-controlled two-dimensional laser beam scan array, which is characterized in that the invention consists of a control array and an emission array; the control array consists of N electro-optical switch units in single line; the structure of the emission array is a matrix structure (N rows and M lines) which is composed of electro-optical switch units (with the quantity of N multiplied by M) so as to form an optical beam scan array (N plus N multiplied by M), wherein, N and M are positive integers more than 1; the electro-optical switch units are formed by the combination of a first crystal and a second crystal which are provided with different optical axis directions; the incident light direction goes forwards along the optical axis of the first crystal; two opposite surfaces of the first crystal vertical to the optical axis are plated by metal electrode pairs so as to apply transverse half-wave voltages on the crystal; the second crystal is a volume ...

Coherent array laser inverse Dammann grating beam-combining aperture filling device

The invention relates to a coherent array laser inverse Dammann grating beam-combining aperture filling device, which consists of coherent laser arrays with the same optical axis, a spectral distribution phase plate, a Fourier transformation lens and an inverse Dammann grating in turn, wherein the spectral distribution phase plate and the inverse Dammann grating are placed on an object plane and a spectrum plane of the Fourier transformation lens respectively. The filling device can combine array coherent laser light and fill the laser light into a single light beam to achieve the aim of greatly improving the output power of a laser and the light beam quality, has the characteristics of simple structure and principle, and stable and reliable performance, can control the size of output light beams and the width of far-field light beams, can be widely applied in correlative fields requiring high-power laser emission sources, is particularly applied in the fields of laser radars, laser weapons ...

Fresnel telescope imaging laser radar

The invention discloses a Fresnel telescope imaging laser radar, which comprises a laser, a transmitting polarization beam splitter, a first channel space phase modulator, a second channel space phase modulator, a transmitting polarization beam combiner, a laser amplifier, a transmitter-telescope, an optical beam scanner, a receiver-telescope, a receiving polarization beam splitter, a 2*4 90-degree space optical hybrid, an A-path balanced receiver and an A-path amplification and analog to digital converter, a B-path balanced receiver and a B-path amplification and analog to digital converter, a pluralizing device, a time and space coordinate converter, a resampling interpolation space coordinate converter, a matching filter and a control computer. The Fresnel telescope imaging laser radar can realize two-dimensional imaging of a target in a super optical resolution limit, improves the receiving sensitivity and imaging signal-to-noise ratio, greatly increases receiving optical aperture and ...

Electro-optical control two-dimensional laser beam scanning array