CN105675149A - Pneumatic optical effect corrector based on self-illuminating wavefront sensor - Google Patents
Pneumatic optical effect corrector based on self-illuminating wavefront sensor Download PDFInfo
- Publication number
- CN105675149A CN105675149A CN201610016233.XA CN201610016233A CN105675149A CN 105675149 A CN105675149 A CN 105675149A CN 201610016233 A CN201610016233 A CN 201610016233A CN 105675149 A CN105675149 A CN 105675149A
- Authority
- CN
- China
- Prior art keywords
- wavefront
- light wave
- optical effect
- image
- aero
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 67
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 238000012545 processing Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000000284 extract Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 37
- 230000008569 process Effects 0.000 claims description 33
- 238000005286 illumination Methods 0.000 claims description 25
- 238000003384 imaging method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 abstract description 9
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000006870 function Effects 0.000 description 14
- 238000003702 image correction Methods 0.000 description 11
- 238000009826 distribution Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004304 visual acuity Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 238000001757 thermogravimetry curve Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J2009/002—Wavefront phase distribution
Abstract
The invention provides a pneumatic optical effect corrector based on a self-illuminating wavefront sensor. The corrector comprises a self-illuminating wavefront measuring instrument, an image collector, and a processor. The self-illuminating wavefront measuring instrument is used to transmit a collimated laser beam, receives a distorted wavefront generated after diffusion light of the collimated laser beam diffused by atmospheric particles is subjected to optical effect, and extracts a deviation parameter of a distorted wavefront. The image collector is used to receive target light wave carrying an original image of a target region and perform image processing of image data of the original image to obtain a real image of the target region. The processor is used for deconvolution operation on the deviation parameter and the real image of the target region to obtain a reconstructed image of the target region. The corrector reconstructs a laser distortion source to effectively measure in real time the wavefront distortion caused by pneumatic optical effect, so that the precision and accuracy of wavefront distortion measurement are both high, and thus good correction effect and practicality of the system are further guaranteed.
Description
Technical field
The present invention relates to technical field of image processing, in particular to based on from the aero-optical effect correcting unit illuminating Wavefront sensor.
Background technology
Aerial Images can accurately and comprehensively provide the data of dynamically observation in global range, is one of every field important means of obtaining information, has highly important using value. The advantage that aerial images has high-resolution, large scale, little area, high Up-to-date state. Wherein, by the sample of high-resolution image equipment loaded on aircraft, ground scene and object are shot and namely can obtain Aerial Images.
But, aircraft is when atmosphere high speed flight, owing to producing real gas effect, SHOCK WAVE INDUCED boundary layer separation, interfering without viscosity flow and boundary region between its optical dome and free incoming flow, thus producing the complex flowfield because current density change, variations in temperature, constituent change and gas molecule ionization etc. cause, imaging system of taking photo by plane is caused heat, heat radiation and image transmitting interference by this, causing target offset, shake, obscure, this effect is called aero-optical effect. The existence of aero-optical effect will largely effect on the resolving power of imaging system of taking photo by plane undoubtedly. Therefore, the impact of high speed survey calculation aero-optical effect quantitatively, and take effective method to compensate, correct this impact, become one of key issue of technology development of taking photo by plane.
Providing a kind of aero-optical effect correcting unit in prior art, the measurement of the wavefront distortion of visible light wave is reduced with the objective fuzzy image produced by aero-optical effect by this device by Wavefront sensor.
Inventor finds under study for action, aero-optical effect correcting unit of the prior art is based on visible ray for the measurement of wavefront distortion, and take photo by plane night and can be subject to the restriction of visible light wave, make the degree of accuracy that wavefront distortion measures all not high with accuracy, thus causing that the calibration result of correcting unit is poor, practicality is relatively low.
Summary of the invention
It is an object of the invention to provide based on from the aero-optical effect correcting unit illuminating Wavefront sensor, by rebuild laser distortion source and be corrected with the wavefront distortion real-time and efficiently aero-optical effect caused and above-mentioned correction by the restriction of visible light wave, practicality is stronger.
First aspect, embodiments provides based on from the aero-optical effect correcting unit illuminating Wavefront sensor, and this system specifically includes: from illumination wavefront measurement instrument, image collecting device and process device;
Described from illumination wavefront measurement instrument, it is used for launching collimated laser beam, the distorted wavefront that the scattering light wave of the described collimated laser beam of reception atmospheric particles scattering produces after aero-optical effect, extracts the dispersed parameters in described distorted wavefront;
Described image collecting device, for receiving the target light wave of the original image carrying target area, carries out imaging processing to the view data of described original image, obtains the real image of described target area;
Described process device, for the real image of described dispersed parameters and described target area is carried out de-convolution operation, obtains the reconstruction image of described target area.
In conjunction with first aspect, embodiments providing the first possible embodiment of first aspect, wherein, the described wavefront measurement instrument of illumination certainly includes laser instrument, beam collimator and Wavefront sensor;
Described laser instrument, for launching laser beam according to pre-set level parameter;
Described beam collimator, for compressing the angle of divergence of described laser beam according to optical system, and utilizes telescope to obtain the collimated laser beam paralleled with the reference axis of the laser beam of angle of divergence compression;
Described Wavefront sensor, the distorted wavefront that the scattering light wave for receiving the described collimated laser beam of atmospheric particles scattering produces after aero-optical effect, extracts the dispersed parameters in described distorted wavefront.
In conjunction with the first possible embodiment of first aspect, embodiments providing the embodiment that the second of first aspect is possible, wherein, described image collecting device includes optical lens, Infrared Detectors, signal processor and the first display;
Described optical lens, for receiving the target light wave that described target area sends, sends described target light wave to described Infrared Detectors;
Described Infrared Detectors, for extracting the infra-red radiation heat that described target light wave is corresponding, is converted to analog electrical signal by described infra-red radiation heat;
Described signal processor, for described analog electrical signal is converted to according to analog digital conversion the digital signal of correspondence, is analyzed described digital signal processing, obtains the real image of the target area corresponding with described digital signal;
Described first display, for showing the real image of described target area.
In conjunction with the embodiment that the second of first aspect is possible, embodiments providing the third possible embodiment of first aspect, wherein, described system also includes spectroscope;
Described spectroscope, distorted wavefront that scattering light wave for receiving the described collimated laser beam of atmospheric particles scattering produces after aero-optical effect and the target light wave that described target area sends, respectively described distorted wavefront and described target light wave are easily separated process according to spectral characteristic, obtain the infrared waves that visible light wave corresponding to the visible light part of described distorted wavefront is corresponding with the black light part of described target light wave.
The third possible embodiment in conjunction with first aspect, embodiments provide the 4th kind of possible embodiment of first aspect, wherein, described optical lens, it is additionally operable to receive described spectroscope and separates the described infrared waves obtained, described infrared waves is sent to described Infrared Detectors.
In conjunction with the 4th kind of possible embodiment of first aspect, embodiments providing the 5th kind of possible embodiment of first aspect, wherein, described system also includes optical match device;
Described optical match device, the described visible light wave obtained for receiving described spectroscope to separate, described visible light wave is sent to described Wavefront sensor, the coupling in order to ensure described spectroscope and described Wavefront sensor is arranged.
In conjunction with the 5th kind of possible embodiment of first aspect, embodiments providing the 6th kind of possible embodiment of first aspect, wherein, described Wavefront sensor includes microlens array, centroid detection device and arithmetical unit;
Described microlens array, for receiving the visible light wave that described optical match device sends, carries out dividing processing by described visible light wave, obtains the visible light wave of son matched with described microlens array number, visible for described son light wave is pooled spot array;
Described centroid detection device, is used for storing and show described spot array;
Described arithmetical unit, for described spot array is carried out difference operation process with the standard spot array prestored, obtain the dispersed parameters corresponding to described visible light wave.
In conjunction with the 6th kind of possible embodiment of first aspect, embodiments providing the 7th kind of possible embodiment of first aspect, wherein, described process device includes processor;
Described processor, for receiving the dispersed parameters sent described arithmetical unit, is reconstructed process to described dispersed parameters, obtains reconstruct wavefront function; Real image according to described target area, the convolution relation between described reconstruct wavefront function and the original image of described target area, real image and described reconstruct wavefront function to described target area carry out de-convolution operation process, obtain the reconstruction image of the described target area corresponding with described real image.
In conjunction with the 7th kind of possible embodiment of first aspect, embodiments providing the 8th kind of possible embodiment of first aspect, wherein, described process device also includes second display;
Described second display, for showing the reconstruction image of described target area.
In conjunction with first aspect, first aspect the first possible embodiment to any one the possible embodiment in the 8th kind of possible embodiment of first aspect, embodiments provide the 9th kind of possible embodiment of first aspect, wherein, described Wavefront sensor is Hartmann wave front sensor.
Present invention advantage compared with prior art is in that: the aero-optical effect image correction system that the embodiment of the present invention provides, adopt from illumination wavefront measurement instrument, image collecting device and process device make whole correction system integration and automatization, take photo by plane the restriction being subject to visible light wave with aero-optical effect correcting unit of the prior art at night and cause calibration result poor, practicality is relatively low to be compared, it is by rebuilding the visible light wave that the distortion measurement that laser distortion source is illumination wavefront measurement instrument certainly provides enough, above-mentioned distortion source can be utilized to carry out the real-time measurement of wavefront distortion from illumination wavefront measurement instrument, obtain dispersed parameters, the real image of target area can be obtained by above-mentioned image collecting device, finally, utilization processes device and carries out the de-convolution operation between above-mentioned dispersed parameters and above-mentioned real image, obtain the reconstruction image of high-quality target area, in whole process, above-mentioned correction system is by rebuilding the wavefront distortion measurement real-time and efficiently aero-optical effect to be caused of the laser distortion source, making the degree of accuracy that wavefront distortion is measured all higher with accuracy, thus further ensuring the calibration result of said system, practicality is better.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, it is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 illustrates the structural representation based on the aero-optical effect correcting unit from illumination Wavefront sensor that the embodiment of the present invention provides;
Fig. 2 illustrates the structural representation certainly illuminating wavefront measurement instrument in the aero-optical effect correcting unit based on illumination Wavefront sensor certainly that the embodiment of the present invention provides;
Fig. 3 illustrate that the embodiment of the present invention provides based on the structural representation of Wavefront sensor in the aero-optical effect correcting unit illuminating Wavefront sensor;
Fig. 4 illustrate that the embodiment of the present invention provides based on the structural representation of image collecting device in the aero-optical effect correcting unit illuminating Wavefront sensor;
Fig. 5 illustrates the concrete application scenarios figure based on the aero-optical effect correcting unit from illumination Wavefront sensor that the embodiment of the present invention provides;
Fig. 6 illustrates the structural representation processing device in the aero-optical effect correcting unit based on illumination Wavefront sensor certainly that the embodiment of the present invention provides.
Main element symbol description in figure:
11, from illumination wavefront measurement instrument; 22, image collecting device; 33, device is processed; 44, spectroscope; 55, optical match device; 111, laser instrument; 112, beam collimator; 113, Wavefront sensor; 221, optical lens; 222, Infrared Detectors; 223, signal processor; 224, the first display; 331, processor; 332, second display; 1131, microlens array; 1132, centroid detection device; 1133, arithmetical unit.
Detailed description of the invention
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Generally can with various different configurations arrange and design with the assembly of the embodiment of the present invention that illustrate described in accompanying drawing herein. Therefore, below the detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed the scope of the present invention, but is merely representative of the selected embodiment of the present invention. Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
Considering takes photo by plane at night based on the aero-optical effect correcting unit of visible wave measurement wavefront distortion in prior art can be subject to the restriction of visible light wave, make the degree of accuracy that wavefront distortion is measured all not high with accuracy, thus causing that the calibration result of correcting unit is poor, practicality is relatively low, based on this, embodiments provide based on from the aero-optical effect correcting unit illuminating Wavefront sensor, this system is by rebuilding laser distortion source, wavefront distortion is measured by the atmospheric backscatter characteristic according to laser, and real-time and efficiently above-mentioned wavefront distortion is corrected, by the restriction of visible light wave, practicality is stronger to improve the resolving power of imaging system of taking photo by plane and above-mentioned correction.
The concrete structure of aero-optical effect image correction system provided by the invention is as follows:
Referring to Fig. 1, the embodiment of the present invention provides based on from the aero-optical effect correcting unit illuminating Wavefront sensor, and this system specifically includes: from illuminating wavefront measurement instrument 11, image collecting device 22 and processing device 33;
From illumination wavefront measurement instrument 11, it is used for launching collimated laser beam, receives the distorted wavefront that the scattering light wave of the collimated laser beam of atmospheric particles scattering produces after aero-optical effect, extract the dispersed parameters in distorted wavefront;
Image collecting device 22, for receiving the target light wave of the original image carrying target area, carries out imaging processing to the view data of original image, obtains the real image of target area;
Process device 33, for the real image of dispersed parameters and target area is carried out de-convolution operation, obtain the reconstruction image of target area.
The aero-optical effect image correction system that the embodiment of the present invention provides, with aero-optical effect correcting unit of the prior art night take photo by plane the restriction being subject to visible light wave and cause that calibration result is poor, practicality relatively low compared with, it is by rebuilding the visible light wave that the distortion measurement that laser distortion source is illumination wavefront measurement instrument 11 certainly provides enough, above-mentioned distortion source can be utilized to carry out the real-time measurement of wavefront distortion from illumination wavefront measurement instrument 11, obtain dispersed parameters; The real image of target area can be obtained by above-mentioned image collecting device 22; Finally, utilization processes device 33 and carries out the de-convolution operation between above-mentioned dispersed parameters and above-mentioned real image, obtain the reconstruction image of high-quality target area, in whole process, above-mentioned correction system is by rebuilding the wavefront distortion measurement real-time and efficiently aero-optical effect to be caused of the laser distortion source, making the degree of accuracy that wavefront distortion is measured all higher with accuracy, thus further ensuring the calibration result of said system, practicality is better.
Concrete, along with laser technology is in the extensive use in multiple fields, generally all it is desirable to utilize the high directivity of laser to make the laser of transmitting arrive pointed target without loss, but, when laser transmits in an atmosphere, owing in air, the refractive index of material is uneven, cause the disturbance on incidence wave corrugated, will result in that the part energy in incidence wave can deviate the former direction of propagation when running into atmospheric particles and opposite direction to all the winds is propagated. Namely the present invention is based on the research of above-mentioned atmospheric backscatter characteristic by carrying out the real-time measurement of wavefront distortion produced by this distortion source under aero-optical effect while rebuilding laser distortion source and providing enough visible light wave for distortion measurement. Therefore, the aero-optical effect image correction system that the embodiment of the present invention provides includes from illumination wavefront measurement instrument 11, rebuild laser distortion source on the one hand, launch collimated laser beam, after the materials such as the same atmospheric particles of this laser beam, aerosol interact, due to the impact according to atmospheric backscatter phenomenon, scattering is corresponded to the scattering light wave of laser beam by above-mentioned substance; On the other hand, the above-mentioned wavefront measurement instrument 11 of illumination certainly is additionally operable to receive the distorted wavefront that above-mentioned scattering light wave produces after aero-optical effect, and by extracting the dispersed parameters of distorted wavefront, this distorted wavefront is made directly measurement, wherein, this dispersed parameters at least includes wavefront slope.
The picked-up of image in imaging system of considering to take photo by plane is with UAV for aerial platform, with special camera, video camera and video wireless transmission technical limit spacing information, with computer, image information is processed, and according to the image that certain required precision obtains, the aero-optical effect image correction system that the embodiment of the present invention provides also includes image collecting device 22, this image collecting device 22 is the optics for photographing, utilize the straightline propagation character of light and the law of refraction of light, with photon for carrier, the optical information amount of the view data of certain flashy measured target, sensitive material is passed to through the image information of the camera lens collection of image collecting device 22 with energy mode, eventually become the real image of visual target area.In order to better meet the dual requirements taken photo by plane daytime and take photo by plane night, consider that infrared thermal imaging technique detectivity is strong, operating distance is remote, day and night all can the good characteristic such as normal operation, the embodiment of the present invention preferably using infrared thermoviewer as image collecting device 22. This infrared thermography, is scanned the infrared thermal imagery of testee by optical mechaical scanning mechanism, and focuses in spectroscopic detectors, detector infrared energy is converted to the signal of telecommunication, then shows Infrared Thermogram again through display. This Infrared Thermogram is corresponding with the heat distribution field of body surface, the Temperature Distribution of body surface is converted to the real image of the visible target area of human eye, observation imaging effect is good, and is not easily susceptible to the impact of the adverse weather condition such as rain, mist so that the robustness of acquisition system of taking photo by plane is better.
For the ease of the further analyzing and processing to the dispersed parameters in above-mentioned distorted wavefront with the real image of target area, the embodiment of the present invention also includes process device 33, this process device 33 is for being received from the accurate wavefront distortion information that illumination wavefront measurement instrument 11 extracts, and by wavefront distortion information recovery for reconstructing wavefront function, also receive the real image of the target area after image collecting device 22 processes simultaneously, by the real image of target area, convolution relation between original image and the reconstruct wavefront function of target area, the high resolution that Deconvolution Technique realizes the real image to target area is utilized to rebuild, obtain the reconstruction image of target area, reconstructed image quality is high, improve the resolving power of imaging system of taking photo by plane.
Further, in order to ensure self distortion source can be utilized wavefront distortion measurement produced by aero-optical effect from illumination wavefront measurement instrument 11, referring to Fig. 2, the embodiment of the present invention in include three devices such as laser instrument 111, beam collimator 112 and Wavefront sensor 113 from illumination wavefront measurement instrument 11.
Laser instrument 111 in the aero-optical effect image correction system that the embodiment of the present invention provides is one of essential elements determining laser distortion source performance. The type of this laser instrument 111 and performance requirement depend on concrete detection target. Above-mentioned performance indications mainly have output wavelength, energy and stability, repetition rate, beam divergence angle and laser pulse width etc. Wherein, optical maser wavelength determines the kind of the laser composition of transmitting; The size of energy is relevant with the effective range of transmitting and signal to noise ratio; The high-repetition-rate of laser instrument 111 can improve the spatial-temporal distribution characteristic of laser; Beam divergence angle, pulse width then identify lasertron dispersion angle in the transmit direction and launch the detectable minimum space resolution of laser. Considering concrete application scenarios, the laser instrument 111 in the embodiment of the present invention can launch corresponding laser beam according to the pre-set level parameter corresponding with above-mentioned performance indications.
In order to obtain higher-quality laser distortion source, the embodiment of the present invention is additionally provided with beam collimator 112, this beam collimator 112 first compresses the waist radius of laser beam with lens, the angle of divergence of laser beam is compressed again with focal length lens, finally by telescope, the laser beam after compression is carried out collimation process, obtaining the collimated laser beam that the reference axis of the laser beam with this compression is paralleled, this collimated laser beam directional lighting, brightness is high, color is extremely pure, energy density is very big.
Consider the existence of atmospheric backscatter phenomenon, in the process that this collimated laser beam is transmitted in an atmosphere, the above-mentioned collimated laser beam making incidence due to the interaction of the materials such as itself and atmospheric particles produces scattering light wave, this scattering light wave is as the distortion source of distortion measurement, it will produce wavefront distortion phenomenon after aero-optical effect, distorted wavefront is measured by the embodiment of the present invention by Wavefront sensor 113, the wavefront distortion that this Wavefront sensor 113 produces through aero-optical effect for scattering light wave is made directly measurement, obtain dispersed parameters, reconstruct recovery function for wavefront distortion provides basis, simultaneously, it also is able to improve correction rate and the effect of aero-optical effect image correction system. consider that airborne imaging system of taking photo by plane needs the ground image below by aircraft to be transferred to ground in real time, display in real time, real time record, for navigating and finding a view, so, the image blur phenomena that imaging system is brought by aero-optical effect is also required to the carrying out of real-time and restores to meet the demand taken photo by plane, then in the embodiment of the present invention preferred using Hartmann wave front sensor as Wavefront sensor 113, this Hartmann wave front sensor can measure PHASE DISTRIBUTION and the intensity distributions of light field by significantly high sample frequency simultaneously, disclosure satisfy that when taking photo by plane owing to the real-time of wavefront distortion that Atmosphere changes causes faster is measured, wherein, Hamann spy's Wavefront sensor is a kind of wavefront test instrunment being measured as basis with wavefront slope, the measurement of above-mentioned wavefront slope is carried out by the related optical characteristic parameter spatial information of the wavefront distortion of acquisition and/or temporal information, its simple in construction, motility is good, specular removal efficiency and to environmental condition require low, adaptive capacity is stronger, more can meet the demand of the user that takes photo by plane.
Wherein, referring to Fig. 3, above-mentioned Wavefront sensor 113 includes microlens array 1131, centroid detection device 1132 and arithmetical unit 1133, this microlens array 1131 is for obtaining the distorted wavefront that scattering light wave produces after aero-optical effect, the corrugated of distorted wavefront is divided into several sampling units by this, these sampling units are converged in by high quality lens respectively and form spot array in the focus of separation, then receive with centroid detection device 1132 and show above-mentioned spot array. It is considered that the inclination of wave front within the scope of each sub-aperture will result in the displacement in the x and y direction of its hot spot, the barycenter of hot spot departure degree in the x and y direction reflects corresponding sampling unit corrugated wavefront slope in the two directions. The embodiment of the present invention, by carrying out the difference operation between above-mentioned spot array and the standard spot array prestored arithmetical unit 1133, obtains the dispersed parameters containing wavefront slope corresponding to distorted wavefront.
Further, in order to better carry out the collection of target area image, referring to Fig. 4, the image collecting device 22 that the embodiment of the present invention provides includes optical lens 221, Infrared Detectors 222, signal processor 223 and the first display 224; Wherein,
Above-mentioned optical lens 221 is for receiving the target light wave that target area sends, target light wave is sent to Infrared Detectors 222, this Infrared Detectors 222 then extracts the infra-red radiation heat that target light wave is corresponding, infra-red radiation heat is converted to corresponding analog electrical signal, by signal processor 223, above-mentioned analog electrical signal is converted to the digital signal of correspondence, it is analyzed this digital signal processing, obtain the real image of corresponding target area, the display of the last real image being carried out this target area by the first display 224, wherein, above-mentioned first display 224 can be computer screen, it can also be any display device with display function.
In order to better tackle the decay being subject to noise jamming in data transmission and produce, before carrying out above-mentioned analog digital conversion, utilization is also had enlarging function electronic circuit by the embodiment of the present invention, it is amplified processing according to certain amplification by above-mentioned analog electrical signal, in addition, it is also contemplated that the impact that harmonic wave is on weak electricity system, analog electrical signal after amplified also will be filtered processing by the embodiment of the present invention, some frequencies are allowed to pass through, and other frequency contents are suppressed, to filter multiple harmonic, obtain filtered analog electrical signal.
Further, in order to ensure to have enough visible light waves to be able to ensure that again while realizing the measurement of wavefront distortion by Wavefront sensor 113, image collecting device 22 has enough luminous energy to carry out imaging, above-mentioned image correction system also includes spectroscope 44, referring to Fig. 5, this spectroscope 44 is made up of optical glass coating, distorted wavefront that its scattering light wave of collimated laser beam receiving atmospheric particles reflection respectively produces after aero-optical effect and the target light wave of target area transmission, according to different spectral characteristic distributions, distorted wavefront and target light wavelength-division are not easily separated process by spectral space chromatic dispersion principle, obtain the infrared waves that visible light wave corresponding to the visible light part of distorted wavefront is corresponding with the black light part of target light wave. wherein, by the centrifugation of spectroscope 44 so that the laser distortion source of reconstruction has enough visible light waves to ensure the accuracy and precision of the measurement of Wavefront sensor 113, and make image collecting device 22 have enough infrared waveses to carry out imaging, two parts of light waves then can glitch-free work alone, and better ensure that next step analyzing and processing.
Now, the optical lens 221 in image collecting device 22 is then used for receiving the isolated infrared waves of spectroscope 44, and sends this infrared waves to infrared detecting set. Wherein, the image-forming principle that image collecting device 22 gathers the principle and image collecting device 22 mentioned above itself that infrared waves carries out imaging is similar, does not repeat them here.
Additionally, coupling in order to ensure spectroscope 44 and Wavefront sensor 113 is arranged, the aero-optical effect image correction system that the embodiment of the present invention provides also includes optical match device 55, referring to Fig. 5, this optical match device 55 is made up of a series of optics, and the transmission being used for enough mating isolated for spectroscope 44 visible ray wave energy is to Wavefront sensor 113. Wherein, above-mentioned coupling arranges and refers to that spectroscope 44 transmitting terminal matches with the receiving terminal of Wavefront sensor 113.
Now, microlens array 1131 in Wavefront sensor 113 is then for receiving the visible light wave that above-mentioned optical match device 55 sends, visible light wave is carried out dividing processing, obtains the visible light wave of son matched with microlens array 1131 number, visible for son light wave is pooled spot array. Wherein, the measuring principle that Wavefront sensor 113 gathers the principle and Wavefront sensor 113 mentioned above itself that visible light wave carries out distortion measurement is similar, does not repeat them here.
Further, referring to Fig. 6, the process device 33 that the embodiment of the present invention provides includes processor 331 and second display 332.
Above-mentioned processor 331, it is initially used for receiving the dispersed parameters that Wavefront sensor 113 sends, and in conjunction with Zernike polynominal wavefront control algorithm, relation between restructuring matrix and above-mentioned dispersed parameters that recovery matrix according to Wavefront sensor 113 obtains, obtain zernike coefficient vector, and then obtain reconstruct wavefront function, then further according to the real image of target area, convolution relation between reconstruct wavefront function and the original image of target area, by the real image of target area is carried out de-convolution operation process with reconstruct wavefront function, obtain the reconstruction image of the target area corresponding with real image, finally by second display 332 by this real-time displaying of reconstruction image, the quality of the above-mentioned reconstruction image after correction is better, the resolving power of imaging system of making to take photo by plane is higher, same, above-mentioned second display 332 can be computer screen, it can also be any display device with display function.
In addition, included by the aero-optical effect image correction system that the embodiment of the present invention provides from illumination wavefront measurement instrument 11, image collecting device 22 and process device 33 integrated setting in aerial photography aircraft, miniaturization, it is easily installed and carries, and less costly.
The aero-optical effect image correction system that the embodiment of the present invention provides, with aero-optical effect correcting unit of the prior art night take photo by plane the restriction being subject to visible light wave and cause that calibration result is poor, practicality relatively low compared with, it is by rebuilding the visible light wave that the distortion measurement that laser distortion source is illumination wavefront measurement instrument 11 certainly provides enough, above-mentioned distortion source can be utilized to carry out the real-time measurement of wavefront distortion from illumination wavefront measurement instrument 11, obtain dispersed parameters; The real image of target area can be obtained by above-mentioned image collecting device 22; Finally, utilization processes device 33 and carries out the de-convolution operation between above-mentioned dispersed parameters and above-mentioned real image, obtain the reconstruction image of high-quality target area, in whole process, above-mentioned correction system is by rebuilding the wavefront distortion measurement real-time and efficiently aero-optical effect to be caused of the laser distortion source, making the degree of accuracy that wavefront distortion is measured all higher with accuracy, thus further ensuring the calibration result of said system, practicality is better.
In several embodiments provided herein, it should be understood that disclosed system can realize by another way. Device embodiment described above is merely schematic, such as, the division of described unit, it is only a kind of logic function to divide, actual can have other dividing mode when realizing, again such as, multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform. Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some communication interfaces, device or unit, it is possible to be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE. Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium. Based on such understanding, part or the part of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention. And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that including: from illumination wavefront measurement instrument, image collecting device and process device; Wherein,
Described from illumination wavefront measurement instrument, it is used for launching collimated laser beam, the distorted wavefront that the scattering light wave of the described collimated laser beam of reception atmospheric particles scattering produces after aero-optical effect, extracts the dispersed parameters in described distorted wavefront;
Described image collecting device, for receiving the target light wave of the original image carrying target area, carries out imaging processing to the view data of described original image, obtains the real image of described target area;
Described process device, for the real image of described dispersed parameters and described target area is carried out de-convolution operation, obtains the reconstruction image of described target area.
2. according to claim 1 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that the described wavefront measurement instrument of illumination certainly includes laser instrument, beam collimator and Wavefront sensor;
Described laser instrument, for launching laser beam according to pre-set level parameter;
Described beam collimator, for compressing the angle of divergence of described laser beam according to optical system, and utilizes telescope to obtain the collimated laser beam paralleled with the reference axis of the laser beam of angle of divergence compression;
Described Wavefront sensor, the distorted wavefront that the scattering light wave for receiving the described collimated laser beam of atmospheric particles scattering produces after aero-optical effect, extracts the dispersed parameters in described distorted wavefront.
3. according to claim 2 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that described image collecting device includes optical lens, Infrared Detectors, signal processor and the first display;
Described optical lens, for receiving the target light wave that described target area sends, sends described target light wave to described Infrared Detectors;
Described Infrared Detectors, for extracting the infra-red radiation heat that described target light wave is corresponding, is converted to analog electrical signal by described infra-red radiation heat;
Described signal processor, for described analog electrical signal is converted to according to analog digital conversion the digital signal of correspondence, is analyzed described digital signal processing, obtains the real image of the target area corresponding with described digital signal;
Described first display, for showing the real image of described target area.
4. according to claim 3 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that also to include spectroscope;
Described spectroscope, distorted wavefront that scattering light wave for receiving the described collimated laser beam of atmospheric particles scattering produces after aero-optical effect and the target light wave that described target area sends, respectively described distorted wavefront and described target light wave are easily separated process according to spectral characteristic, obtain the infrared waves that visible light wave corresponding to the visible light part of described distorted wavefront is corresponding with the black light part of described target light wave.
5. according to claim 4 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterized in that, described optical lens, is additionally operable to receive described spectroscope and separates the described infrared waves obtained, send described infrared waves to described Infrared Detectors.
6. according to claim 5 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that also to include optical match device;
Described optical match device, the described visible light wave obtained for receiving described spectroscope to separate, described visible light wave is sent to described Wavefront sensor, the coupling in order to ensure described spectroscope and described Wavefront sensor is arranged.
7. according to claim 6 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that described Wavefront sensor includes microlens array, centroid detection device and arithmetical unit;
Described microlens array, for receiving the visible light wave that described optical match device sends, carries out dividing processing by described visible light wave, obtains the visible light wave of son matched with described microlens array number, visible for described son light wave is pooled spot array;
Described centroid detection device, is used for storing and show described spot array;
Described arithmetical unit, for described spot array is carried out difference operation process with the standard spot array prestored, obtain the dispersed parameters corresponding to described visible light wave.
8. according to claim 7 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that described process device includes processor;
Described processor, for receiving the dispersed parameters sent described arithmetical unit, is reconstructed process to described dispersed parameters, obtains reconstruct wavefront function; Real image according to described target area, the convolution relation between described reconstruct wavefront function and the original image of described target area, real image and described reconstruct wavefront function to described target area carry out de-convolution operation process, obtain the reconstruction image of the described target area corresponding with described real image.
9. according to claim 8 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that described process device also includes second display;
Described second display, for showing the reconstruction image of described target area.
10. according to any one of claim 1 to 9 based on from the aero-optical effect correcting unit illuminating Wavefront sensor, it is characterised in that described Wavefront sensor is Hartmann wave front sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016233.XA CN105675149B (en) | 2016-01-12 | 2016-01-12 | Based on the aero-optical effect means for correcting from illumination Wavefront sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016233.XA CN105675149B (en) | 2016-01-12 | 2016-01-12 | Based on the aero-optical effect means for correcting from illumination Wavefront sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105675149A true CN105675149A (en) | 2016-06-15 |
| CN105675149B CN105675149B (en) | 2018-11-09 |
Family
ID=56299993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610016233.XA Expired - Fee Related CN105675149B (en) | 2016-01-12 | 2016-01-12 | Based on the aero-optical effect means for correcting from illumination Wavefront sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105675149B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144354A (en) * | 2017-05-27 | 2017-09-08 | 上海航天控制技术研究所 | The infreared imaging device and method of active probe aero-optical effect and real-Time Compensation |
| CN108387361A (en) * | 2016-10-08 | 2018-08-10 | 哈尔滨理工大学 | Array air blowing type aero-optical effect simulator |
| CN108594429A (en) * | 2018-04-13 | 2018-09-28 | 中国科学院光电研究院 | Saturating cloud and mist imaging method based on wavefront correction |
| CN110108271A (en) * | 2019-04-11 | 2019-08-09 | 北京航空航天大学 | Starlight deviation compensation method caused by a kind of aero-optical effect |
| CN111076831A (en) * | 2019-12-05 | 2020-04-28 | 常州大学 | Laser antenna wavefront detection system for space laser communication equipment |
| CN113252292A (en) * | 2021-05-10 | 2021-08-13 | 西北工业大学 | Complex flow field measuring method and system based on convolutional neural network |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245904A (en) * | 1998-08-26 | 2000-03-01 | 中国科学院光电技术研究所 | Optical wave-front sensor |
| JP3371233B2 (en) * | 1993-12-30 | 2003-01-27 | ソニー株式会社 | Defocus amount detector |
| CN101738721A (en) * | 2009-12-25 | 2010-06-16 | 中国科学院光电技术研究所 | Adaptive optical imaging system with system error-free Hartmann wavefront sensor |
| CN201939328U (en) * | 2010-12-09 | 2011-08-24 | 苏州生物医学工程技术研究所 | Eye aberration correction imaging system based on phase difference |
| CN102636271A (en) * | 2012-04-19 | 2012-08-15 | 中国科学院光电技术研究所 | Phase diversity wave front measurement imaging device based on difference optics |
| CN103259976A (en) * | 2012-02-17 | 2013-08-21 | 佳能株式会社 | Image processing apparatus, image pickup apparatus, image processing method |
| DE102013218795A1 (en) * | 2013-09-19 | 2015-03-19 | Carl Zeiss Microscopy Gmbh | Laser scanning microscope and method for correcting aberrations, in particular in high-resolution scanning microscopy |
| US20150198794A1 (en) * | 2014-01-14 | 2015-07-16 | Applied Scientific Instrumentation, Inc. | Light sheet generator |
-
2016
- 2016-01-12 CN CN201610016233.XA patent/CN105675149B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3371233B2 (en) * | 1993-12-30 | 2003-01-27 | ソニー株式会社 | Defocus amount detector |
| CN1245904A (en) * | 1998-08-26 | 2000-03-01 | 中国科学院光电技术研究所 | Optical wave-front sensor |
| CN101738721A (en) * | 2009-12-25 | 2010-06-16 | 中国科学院光电技术研究所 | Adaptive optical imaging system with system error-free Hartmann wavefront sensor |
| CN201939328U (en) * | 2010-12-09 | 2011-08-24 | 苏州生物医学工程技术研究所 | Eye aberration correction imaging system based on phase difference |
| CN103259976A (en) * | 2012-02-17 | 2013-08-21 | 佳能株式会社 | Image processing apparatus, image pickup apparatus, image processing method |
| CN102636271A (en) * | 2012-04-19 | 2012-08-15 | 中国科学院光电技术研究所 | Phase diversity wave front measurement imaging device based on difference optics |
| DE102013218795A1 (en) * | 2013-09-19 | 2015-03-19 | Carl Zeiss Microscopy Gmbh | Laser scanning microscope and method for correcting aberrations, in particular in high-resolution scanning microscopy |
| US20150198794A1 (en) * | 2014-01-14 | 2015-07-16 | Applied Scientific Instrumentation, Inc. | Light sheet generator |
Non-Patent Citations (2)
| Title |
|---|
| 蒋志凌: "哈特曼波前传感器特性和应用研究", 《中国博士学位论文全文数据库》 * |
| 饶长军等: "基于哈特曼夏克波前探测的图像解卷积：室内结果", 《光学学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387361A (en) * | 2016-10-08 | 2018-08-10 | 哈尔滨理工大学 | Array air blowing type aero-optical effect simulator |
| CN108534983A (en) * | 2016-10-08 | 2018-09-14 | 哈尔滨理工大学 | Array air blowing type turbulence effect simulator |
| CN108387361B (en) * | 2016-10-08 | 2019-11-15 | 叶伟坚 | Array air blowing type aero-optical effect simulator |
| CN107144354A (en) * | 2017-05-27 | 2017-09-08 | 上海航天控制技术研究所 | The infreared imaging device and method of active probe aero-optical effect and real-Time Compensation |
| CN108594429A (en) * | 2018-04-13 | 2018-09-28 | 中国科学院光电研究院 | Saturating cloud and mist imaging method based on wavefront correction |
| CN108594429B (en) * | 2018-04-13 | 2021-06-08 | 中国科学院光电研究院 | Cloud-penetrating imaging method based on wavefront correction |
| CN110108271A (en) * | 2019-04-11 | 2019-08-09 | 北京航空航天大学 | Starlight deviation compensation method caused by a kind of aero-optical effect |
| CN111076831A (en) * | 2019-12-05 | 2020-04-28 | 常州大学 | Laser antenna wavefront detection system for space laser communication equipment |
| CN113252292A (en) * | 2021-05-10 | 2021-08-13 | 西北工业大学 | Complex flow field measuring method and system based on convolutional neural network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105675149B (en) | 2018-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105675149A (en) | Pneumatic optical effect corrector based on self-illuminating wavefront sensor | |
| CN106123915B (en) | A kind of pneumatic degraded image recovery system based on direct point spread function | |
| Leachtenauer et al. | Surveillance and reconnaissance imaging systems: modeling and performance prediction | |
| Suzuki et al. | Initial inflight calibration for Hayabusa2 optical navigation camera (ONC) for science observations of asteroid Ryugu | |
| Lloyd | Thermal imaging systems | |
| CN102927982B (en) | Double-spectrum autonomous navigation sensor and design method of double-spectrum autonomous navigation sensor | |
| CN105450933B (en) | The restoring means of blurred picture in a kind of aero-optical effect | |
| CN105282492A (en) | Near-space airborne-to-ground real-time imaging system | |
| Reddy | Satellite remote sensing sensors: principles and applications | |
| EP2593367B1 (en) | Space surveillance system for surveying the near space | |
| Cui et al. | Impact of wavelength shift in relative spectral response at high angles of incidence in landsat-8 operational land imager and future landsat design concepts | |
| US20210041299A1 (en) | Characterizing tropospheric boundary layer thermodynamic and refractivity profiles utilizing selected waveband infrared observations | |
| US11125623B2 (en) | Satellite onboard imaging systems and methods for space applications | |
| Kerr et al. | Light curves for geo object characterisation | |
| CN109655157A (en) | A kind of visible light-infared spectrum detection device and method | |
| Rodionov et al. | Airborne hyperspectral systems for solving remote sensing problems | |
| Abolghasemi et al. | Design and performance evaluation of the imaging payload for a remote sensing satellite | |
| Lebègue et al. | Using exotic guidance for Pleiades-HR image quality calibration | |
| Stephan et al. | Spectroscopy applied to observations of terrestrial light sources of uncertain origin | |
| US11879838B2 (en) | Vicarious calibration using solar glint over water | |
| Deng et al. | Stray light analysis of Moon-based visible and near-infrared system | |
| Yu et al. | A method of real-time monitoring the cyanobacterial bloom in inland waters based on ground-based multi-spectral imaging | |
| Walczykowski et al. | Imagery intelligence from low altitudes: chosen aspects | |
| Rork | Ground-Based Electro-Optical Technology Development | |
| Urquhart | Development of a short-term solar power forecasting capability using ground-based visible wavelength imagery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |