CN207318717U - Based on pulse laser imaging device - Google Patents
Based on pulse laser imaging device Download PDFInfo
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- CN207318717U CN207318717U CN201721109291.3U CN201721109291U CN207318717U CN 207318717 U CN207318717 U CN 207318717U CN 201721109291 U CN201721109291 U CN 201721109291U CN 207318717 U CN207318717 U CN 207318717U
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Abstract
The utility model discloses one kind to be based on pulse laser imaging device, it includes high-power high repeat frequency pulsed laser light source, gate type photoelectric receiving device, high-precision time schedule controller, view synthesis machine, gate type photoelectric receiving device includes high-gain ICCD imagers, ICCD boosters, booster switchs, high-precision time schedule controller is embedded in gate type photoelectric receiving device, gate type photoelectric receiving device is connected with view synthesis machine, ICCD boosters are connected with booster switch, view synthesis machine connects high-power high repeat frequency pulsed laser light source, high-precision time schedule controller is connected with view synthesis machine, high-gain ICCD imagers are connected with high-precision time schedule controller.The utility model improves positioning accuracy, detectivity, the recognition capability of target waterborne.
Description
Technical field
A kind of laser photoelectricity device is the utility model is related to, is filled more particularly to one kind based on pulse laser photoelectronic imaging
Put.
Background technology
China possesses more than 18000 kilometers of coastline, and more than 300 ten thousand square kilometres of marine sites, be to ensure safety of traffic on water, implement
Water transportation management, prevent water pollution, protect water area resource, the territorial sovereignty that safeguards one's country and safeguarding national marine rights and interests, all
There is an urgent need to cover all around, it is round-the-clock monitoring, the waters surveillance system of fast reaction.
Although low-light (level) CCD camera techniques, Low-light Level Night Vision Technology and infrared thermal imaging technique have been achieved with now it is huge into
Step, under normal circumstances, day and night lens are used in combination near infrared light detector, can capture harsh image；It is clear, high right to obtain
Than the image of degree, but for the low dark target of some temperature contrasts, and illuminance is low in addition zero illumination environment under target,
Passive photodetection will be unable to provide enough target resolution and image.And laser lighting Active Imaging technology can then be utilized and swashed
Target illuminated, receives return laser beam imaging, low with to illumination requirement from the influence of target temperature contrast, but laser transmits
During can produce back scattering, and decay in an atmosphere, detection range is restricted, and is improved laser output power, is brought
Laser using security issues.
Utility model content
Technical problem to be solved in the utility model is to provide one kind and is based on pulse laser imaging device, improves mesh waterborne
Target positioning accuracy, detectivity, recognition capability.
The utility model is to solve above-mentioned technical problem by following technical proposals：One kind is imaged based on pulse laser
Device, it is characterised in that it includes high-power high repeat frequency pulsed laser light source, gate type photoelectric receiving device, high accuracy
Time schedule controller, view synthesis machine.Gate type photoelectric receiving device, including high-gain ICCD imagers, ICCD boosters,
Booster switchs, and high-precision time schedule controller is embedded in gate type photoelectric receiving device.Gate type photoelectric receiving device and figure
As real-time processor connection, ICCD boosters are connected with booster switch, and the high-power height of view synthesis machine connection repeats frequency
Rate pulsed laser light source, high-precision time schedule controller are connected with view synthesis machine, high-gain ICCD imagers and high accuracy
Time schedule controller connects.
The pulse laser lighting imaging of ICCD, is active imaging method, has passive photodetection under special environment
The irreplaceable advantage of institute.Using the pulsed laser irradiation target of low duty ratio, carried out by the enhanced ICCD cameras of high-speed strobe
Range gating, overcomes back scattering, receives return laser beam imaging, and high burst pulse instantaneous power, recycles image enhancement technique, compared with
The operating distance of big raising photodetection.
Preferably, new to be based on pulse laser imaging device, high-power high repeat frequency pulsed laser light source use is extremely narrow
The wavelength that pulse width is 0.5ns~100ns is 1.06 μm of pulse lasers.
Preferably, laser energy amplification is using CPA pulse amplifyings technology (Chirped Pulse Amplification, letter
Claim CPA), ensure the steady growth of laser energy.
Preferably, the utility model is based on pulse laser imaging device, equipped with overcurrent, overvoltage, laser power monitor,
With failure automatic protection, warning function.
Preferably, the utility model is based on pulse laser imaging device, and image intensifier (MCP) optimizes, by it
Input window material is changed to fibre faceplate by glass.
Preferably, the utility model is based on pulse laser imaging device, is exposed using target range position gating, electron waves door
0.5ns~100ns synchronous control techniques between light time,
Preferably, the utility model is based on pulse laser imaging device, and view synthesis machine, realizes that video image is real-time
Processing is handled；The time setting of the high-precision time schedule controller of levelling, realizes that intelligent time is set；Complete Range-gated Imager detection
Real-time processing technique.
The positive effect of the utility model is：The utility model improves the positioning accuracy of target waterborne, detection
Ability, recognition capability.The utility model is using the light source angle of divergence and detection viewing field matching technique；High-precision timing control and video
Three key technologies of view synthesis, it is small to design and manufacture backscatterer noise jamming, pulse laser and gate type light
Electric acceptor device, suitable for many military and civil fields such as marine site target acquisition.The utility model reduces medium scatters
Influence of the optical noise to target image, and pulse instantaneous power is improved, improve the detection range of laser imaging radar.
Brief description of the drawings
Fig. 1 is structure diagram when the utility model gate type photoelectric receiving device booster is closed
Fig. 2 is structure diagram when the utility model gate type photoelectric receiving device booster is opened
Fig. 3 the utility model gate type photoelectric receiving device sequence diagrams
Embodiment
The utility model embodiment is provided below in conjunction with the accompanying drawings, to describe the technical solution of the utility model in detail.
As shown in Figure 1, Figure 2 and Figure 3, the utility model, which is based on pulse laser imaging device, includes high-power high repetition frequency
Pulsed laser light source, gate type photoelectric receiving device, high-precision time schedule controller, view synthesis machine.Gate type photoelectricity connects
Receiving device includes high-gain ICCD (enhancing charge coupling device) imager, ICCD boosters, high-precision time schedule controller insertion
In gate type photoelectric receiving device.Gate type photoelectric receiving device is connected with view synthesis machine, and ICCD boosters are with increasing
Strong device switch connection, view synthesis machine connect high-power high repeat frequency pulsed laser light source, high-precision time schedule controller
It is connected with view synthesis machine, high-gain ICCD imagers are connected with high-precision time schedule controller.
S1, high-power high repeat frequency pulsed laser light source, its imaging is using laser as light source, illuminates target,
Receive optics and receive the light radiation that detection target is reflected back and imaging.But echo-signal is transmitted in an atmosphere to be inhaled be subject to air
Decay is received, when echo power is more than the minimal illumination of ICCD, ICCD video cameras meet imaging requirements.Therefore need higher peak value
Power, to ensure having enough operating distance.
By national standard GB 7247.1-2001 (radiation safety, device class, requirement and the users' guidebook of laser product) 3A classes
For laser product in any emission duration and wavelength, human contact's laser emission does not allow more than 3A classes each up to transmitting
The laser product of the limit (AEL), the reachable transmitting limit of 3A class laser products, according to pulse laser emission duration t/s<
10-9, when wavelength X/nm 1050-1400 transmitting limit (AEL) are：104C6C7W or 5 × 107C6C7W m-2, here：C6、C7To repair
Integral divisor wherein C6=ɑ/ɑminAs ɑ≤ɑminWhen C6=1 (ɑ subsystems)；C7The C as wavelength X/nm 1050~11507=1
As can be seen that emission duration t/s (duty cycle) reduces, it is allowed to pulse laser peak power (AEL) increase.And
Pulse instantaneous power is improved, the detection range of laser imaging radar can be improved.
The serious back scattering interference that echo-signal is formed in transmitting procedure in an atmosphere, narrow pulse width increase with gating
Strong device switch together, preferably can separate pulse signal with back scattering, transmission performance improves.
Laser and ICCD Spectral Matching Techniques, requirement of the pulse laser lighting imaging to laser are：Except with certain
Output power or energy；The center frequency stability of laser is high；Modulation is convenient；Long lifespan, small, weight is most light.Pulse is shone
Bright imaging system uses YAG pulse lasers mostly, and operation wavelength is 1.06 μm, 532nm and 1.54 μm.But 532nm, human eye can
It is poor depending on concealment；1.54um, ICCD photoelectric conversion efficiency are low, difference in response, so selecting 1.06 μm.
In view of laser energy, back scattering, radiation safety factor, the utility model is based on pulse laser imaging device, greatly
It for the wavelength of 0.5ns~100ns is that 1.06 μm of pulses swash that power high repeat frequency pulsed laser light source, which uses ultra-narrow pulse width,
Light.
Traditional laser energy amplification uses Q-regulating technique and mode-locking technique, can be compressed to laser pulse width and receive
Second and picosecond magnitude, still, with the raising of laser energy, its peak power will soon increase, and occur various non-linear
Effect and gain saturaition.The utility model high power pulse laser light source uses CPA pulse amplifying technologies
(Chirped Pulse Amplification, abbreviation CPA), CPA technologies solve this technology hardly possible well
Topic.During pulsed laser energy amplifies, even if the energy of laser pulse increases quickly, its peak value rule can also be tieed up
Hold in relatively low level, therefore to avoid the appearance of nonlinear effect and gain saturaition, can ensure the stabilization of laser energy
Increase, while can be to avoid the damage to gain media in laser system and optical element.
The utility model is based on pulse laser imaging device, high-power high repeat frequency pulsed laser light source, by middle Chinese
The safe design of people republic National Military Standard, military laser product and ancillary equipment requires (CJB 2,272 1 95) to be equipped with
Electric current, overvoltage, laser power monitor, have failure automatic protection, warning function.
S2, gate type photoelectric receiving device includes high-gain ICCD (enhancing charge coupling device) imager, ICCD strengthens
Device, booster switch, in high speed optoelectronic camera system, the quality of Optical System Design directly affects image quality, general feelings
Under condition, optical system transmission plane is handled in any case, is always had part light and is reflected, is i.e. veiling glare, different from rear orientation light,
Veiling glare by form the optical element, machine components of system reflection and scattering and produce, finally travel in image plane, just
Ghost image is formd, so as to influence the acutance and contrast of imaging, reduces the resolution ratio of camera lens, the identification of jamming target, due to increasing
Strong device input window is inputted using glass panel, photocathode metal-plated membrane, has quite a few inside glass input window through more
Photocathode is arrived again at after secondary reflection, is formed ghost image.The utility model image intensifier (MCP) optimizes, by it
Input window material is changed to fibre faceplate by glass, and all light of critical angle are less than when incidence angle and can be totally reflected, all only
It can be propagated in fibre core.Optical crosstalk phenomenon will not occur between each other.
S3, high-precision time schedule controller directly control the opening and closing of booster switch.High-precision time schedule controller connects
High-power high repeat frequency pulsed laser light source is connect, control receives laser light source information, and is connected with view synthesis machine, connects
Receive the time setting of view synthesis machine.Device characteristic, using ultra-narrow pulse width 0.5ns~100ns pulse laser lightings,
Using target range position gating, electron waves exposure gate time 0.5ns~100ns synchronous control techniques, laser is eliminated in medium
The serious back scattering interference formed in transmitting procedure；Light impulse length is narrower, is formed in target coordinate position by medium
Backscatterer noise jamming is smaller, and maximum possible reduces the backscatterer noise jamming that medium is formed, backscatterer
Noise jamming intensity is directly proportional to light impulse length, so as to improve the positioning accuracy of target waterborne, detectivity, identification energy
Power.
S4, view synthesis machine, realizes that real-time video processing is handled；The time of the high-precision time schedule controller of levelling
Setting, realizes that intelligent time is set；Complete the real-time processing technique of Range-gated Imager detection.
The video image of high-gain ICCD imagers sends view synthesis machine to by fieldbus, real-time by image
Processor realizes that real-time video processing is handled；View synthesis machine connects high-power high repeat frequency pulsed laser light
Source, starting impulse laser, adjusts laser light source output power, monitors laser operating mode；View synthesis machine and high accuracy
Time schedule controller connects, and high-precision time schedule controller forms intelligence node, time delay is adjusted according to search coverage distance, by height
The classification of precision sequential Timer Controlling gate type photelectric receiver, the field angle of specific two kinds of pattern receiving optics and its institute
The region of illumination.View synthesis machine can be remotely controlled the equipment such as data processing operation, and have automatic failure alarm.
The utility model is the pulse laser imaging based on Range-gated Imager mode, adjusts optical transmitting system to control
Laser beam (angle of divergence) is detected, and using pulse laser, gate type photoelectric receiving device is only in target reflecting light return
Moment just opens range gating door and receives optical radiation signal, and is closed in other times, the storbing gate of gate type photoelectric receiving device
Close, the region illuminated with it matches.
In conclusion the utility model can filter out the back scattering light radiation of medium before and after target, so as to greatly reduce
Influence of the medium scatters optical noise to target image, and pulse instantaneous power can be improved, improve the detection of laser imaging radar
Distance.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on the substantive content of the utility model.
Claims (1)
1. one kind be based on pulse laser imaging device, it is characterised in that it include high-power high repeat frequency pulsed laser light source,
Gate type photoelectric receiving device, high-precision time schedule controller, view synthesis machine, gate type photoelectric receiving device include high increase
Beneficial ICCD imagers, ICCD boosters, booster switch, high-precision time schedule controller are embedded in gate type photoelectric receiving device
Interior, gate type photoelectric receiving device is connected with view synthesis machine, and ICCD boosters are connected with booster switch, and image is real-time
Processor connects high-power high repeat frequency pulsed laser light source, and high-precision time schedule controller is connected with view synthesis machine,
High-gain ICCD imagers are connected with high-precision time schedule controller；
The high-power high repeat frequency pulsed laser light source, uses the ultra-narrow pulse width to be for the wavelength of 0.5ns~100ns
1.06 μm pulse laser；
The ICCD boosters, its input window are fibre faceplate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621025291 | 2016-08-31 | ||
| CN2016210252910 | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108897004A (en) * | 2018-06-28 | 2018-11-27 | 中国人民解放军91977部队 | A kind of laser gated imaging search and rescue device |
-
2017
- 2017-08-31 CN CN201721109291.3U patent/CN207318717U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108897004A (en) * | 2018-06-28 | 2018-11-27 | 中国人民解放军91977部队 | A kind of laser gated imaging search and rescue device |
| CN108897004B (en) * | 2018-06-28 | 2020-11-13 | 中国人民解放军91977部队 | Laser gating imaging search and rescue device |
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