CN105911792A - Nonlinear optical imaging device based on multiple phase matching processes - Google Patents
Nonlinear optical imaging device based on multiple phase matching processes Download PDFInfo
- Publication number
- CN105911792A CN105911792A CN201610531795.8A CN201610531795A CN105911792A CN 105911792 A CN105911792 A CN 105911792A CN 201610531795 A CN201610531795 A CN 201610531795A CN 105911792 A CN105911792 A CN 105911792A
- Authority
- CN
- China
- Prior art keywords
- image
- module
- target object
- frequency
- laser
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000012634 optical imaging Methods 0.000 title abstract description 3
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 238000003384 imaging method Methods 0.000 claims abstract description 37
- 238000005286 illumination Methods 0.000 claims abstract description 25
- 230000004927 fusion Effects 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims description 38
- 238000010168 coupling process Methods 0.000 claims description 38
- 238000005859 coupling reaction Methods 0.000 claims description 38
- 230000002708 enhancing effect Effects 0.000 claims description 29
- 238000007493 shaping process Methods 0.000 claims description 28
- 238000005086 pumping Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000004313 glare Effects 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 4
- 241000208340 Araliaceae Species 0.000 claims description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 3
- 235000008434 ginseng Nutrition 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 238000000513 principal component analysis Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 3
- 238000007500 overflow downdraw method Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 241000931526 Acer campestre Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101000694017 Homo sapiens Sodium channel protein type 5 subunit alpha Proteins 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
- G02F1/3544—Particular phase matching techniques
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/10—Image enhancement or restoration using non-spatial domain filtering
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/50—Image enhancement or restoration using two or more images, e.g. averaging or subtraction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20212—Image combination
- G06T2207/20221—Image fusion; Image merging
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention provides a nonlinear optical imaging device based on multiple phase matching processes, which comprises: the system comprises an illumination laser module, an image receiving module, a spatial frequency selection module, a parameter matching imaging module and an image processing module; the illumination laser module emits illumination light to irradiate a target object; the image receiving module receives light reflected by the target object, and the light enters the parameter matching imaging module after forming a target object image; the spatial frequency selection module adjusts phase matching parameters; the parameter matching imaging module obtains enhanced images of the target object at different spatial frequencies; and the image processing module performs frequency domain operation on the plurality of enhanced images obtained by the parameter matching imaging module according to a preset spatial frequency transfer function to realize image fusion and obtain a high-fidelity fusion image of the enhanced target object image. The device can overcome the problem of poor image resolution caused by limited frequency domain bandwidth in a single nonlinear optical process, and obtains a high-fidelity fusion image after image enhancement.
Description
Technical field
The present invention relates to nonlinear optics and image optics technical field, particularly relate to a kind of based on
The repeatedly nonlinear optics imaging device of phase matched process.
Background technology
At present, image enhaucament means are broadly divided into electrical way and optical mode.Electrical way master
To be used has electron multiplying charge coupled apparatus (EMCCD) and strengthens charge-coupled image sensor
(ICCD), these devices use ratio wide.The major technique of optical mode has excited Raman to dissipate
Penetrate, stimulated Brillouin scattering, optical parameter process etc..Relative to electrical way, optical mode
Advantage essentially consists in, it is possible to achieve frequency is changed, so that the quantum efficiency of entirety is carried
Rise, and obtain high-gain, reduce noise, therefore at biomedical sector, there is preferably application
Prospect.
But, currently used optical mode, such as optically erasing (OPA) and frequency (SFG)
It is only capable of etc. mode limited spatial frequency domain bandwidth is provided, and the gain transfer function of these bandwidth
(ATF) curve full width at half maximum is less than modulation transfer function (MTF) (MTF) curve of optical system
Full width at half maximum, at some spatial frequency, image can only be strengthened, therefore effect is less
Preferable；As it is shown in figure 1, the signal pattern that Figure 1A is input, Figure 1B is to utilize in prior art
The result that the image of Figure 1A is strengthened at a certain spatial frequency by the mode of optically erasing,
It will be seen that enhanced single image is unsatisfactory.Its basic reason is by single non-thread
Property optical imagery, the spatial frequency domain limited bandwidth that single phase-matching condition is corresponding, it is impossible to
Time low frequency and high fdrequency component carried out transmission imaging, thus cause image resolution ratio poor, difficult
With high-fidelity imaging.
In consideration of it, how to overcome in the image enhaucament means of prior art by single nonlinear optics
The limited caused image resolution ratio of process frequency domain bandwidth is poor, be difficult to the problem of high-fidelity imaging,
Obtain high fidelity visual to become to be presently required and solve the technical problem that.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of based on repeatedly phase matched process
Nonlinear optics imaging device, it is possible to realize image in the enhancing of different space frequency, and
Different space frequency is transmitted the image under function and carries out information fusion, thus obtain high-fidelity
Image.
First aspect, the present invention provides a kind of nonlinear optics based on repeatedly phase matched process
Imaging device, including: laser illuminator module, image receiver module, spatial frequency selection module,
Parameter coupling image-forming module and image processing module；Wherein:
Described laser illuminator module sends illumination target object；Described image receiver module
Receive the light that described illumination light is reflected by target object, after forming target object image, enter into institute
State parameter coupling image-forming module；Described spatial frequency selects module to adjust phase matched parameter；Institute
State the phase matched ginseng that parameter coupling image-forming module selects module to adjust according to described spatial frequency
Several described target object image is carried out at different space frequency image enhaucament, it is thus achieved that object
Body enhancing image at different space frequency；Described image processing module is according to the space preset
The target object that described parameter coupling image-forming module is obtained by frequency transfer function is in different spaces
Enhancing image at frequency carries out frequency-domain operations, it is achieved image co-registration, it is thus achieved that target object image
Enhanced high-fidelity fusion image；
Wherein, described phase matched parameter is according to phase matched parameter in nonlinear optical process
Pre-set with the one-to-one relationship of spatial frequency transmission function.
Alternatively, described image receiver module is imaging lens group.
Alternatively, described laser illuminator module, including: illumination laser, shaping and transmitting light
Learn element；
The laser that described illumination laser is launched is through described shaping and transmitting optics component shaping
After be irradiated to target object.
Alternatively, described spatial frequency selects module, including: pump laser, pumping laser
Shaping element, input coupling mirror and phase matched controller；
The pumping laser that described pump laser sends is through described pumping laser shaping optics unit
After the shaping of part, with the laser warp simultaneously of the target object image that described image receiver module is formed
Cross described input coupling mirror and incide the nonlinear optics unit in described parameter coupling image-forming module
Part；Described phase matched controller by regulating the angle of described nonlinear optical element or temperature,
Realize the control to phase misalignment dosage, thus realize different spatial frequencys and select.
Alternatively, described phase matched controller is angle controller, including: rotation platform or
Person's mirror holder, for regulating the angle of described nonlinear optical element, it is achieved to phase misalignment dosage
Control, thus realize different spatial frequencys and select.
Alternatively, described phase matched controller is thermoregulator, is used for monitoring and regulate institute
State the temperature of nonlinear optical element, it is achieved the control to phase misalignment dosage, thus realize difference
Spatial frequency select.
Alternatively, described spatial frequency selects module, also includes: synchronization control module, is used for
Described illumination laser and described pump laser are carried out delays time to control, it is achieved range gating,
The target object image of different depth position is obtained by changing time delay.
Alternatively, described parameter coupling image-forming module, including: nonlinear optical element, output
Coupling mirror, optical beam dump, Image relaying mirror group and linear array charge coupled cell CCD；
After described output coupling mirror, described picture is passed through by the light of described nonlinear optical element
Transmission mirror group incides imaging on described linear array charge coupled cell CCD, the target that will obtain
Object enhancing image at different space frequency sends to described image processing module；Described light
Bundle catcher is collected by the veiling glare after described nonlinear optical element.
Alternatively, described image processing module, including: image pick-up card and processor；
Described image pick-up card receives the object that described linear array charge coupled cell CCD is formed
Body enhancing image at different space frequency, described processor passes according to the spatial frequency preset
Delivery function carries out frequency-domain operations to described target object enhancing image at different space frequency,
Realize image co-registration, it is thus achieved that target object image enhanced high-fidelity fusion image.
Alternatively, described processor is to described target object enhancing figure at different space frequency
As carrying out frequency-domain operations, it is achieved image co-registration, it is thus achieved that the enhanced Gao Baorong of target object image
Close the algorithm of true image, including: based on wavelet transformation, Fourier transform, principal component analysis
PCA or the algorithm of intensity tone saturation IHS conversion.
As shown from the above technical solution, the present invention's is based on repeatedly phase matched process non-linear
Optical imaging device, it is possible to overcome by single nonlinear optical process frequency domain band block limited caused
The poor difficulty of image resolution ratio, it is achieved to image in the enhancing of different space frequency, and will
Image under different space frequency transmission function carries out information fusion, thus obtains melting of high-fidelity
Close image.
Accompanying drawing explanation
Fig. 1 is the mode utilizing optically erasing in prior art to image at a certain space frequency
Carrying out the schematic diagram strengthened at rate, wherein, Figure 1A is the signal pattern of input, Tu1BWei
Prior art utilize the mode of optically erasing to the image of Figure 1A at a certain spatial frequency
Carry out the result schematic diagram strengthened；
Fig. 2 for first embodiment of the invention provide a kind of based on repeatedly phase matched process
The structural representation of nonlinear optics imaging device；
Fig. 3 for second embodiment of the invention provide a kind of based on repeatedly phase matched process
The structural representation of nonlinear optics imaging device；
Fig. 4 is the second embodiment of the invention ATF curve when out of phase amount of mismatch；
The phase misalignment dosage Δ k that Fig. 5 provides for second embodiment of the invention and nonlinear crystal
The relation schematic diagram of angle delta θ；
A, B, C, D corresponding phase amount of mismatch that Fig. 6 provides for second embodiment of the invention
It is respectively 1.7cm-1、-3.7cm-1、-6.3cm-1、-8.3cm-1Time different space frequency at strengthen
After image；
Fig. 7 is that second embodiment of the invention uses through image based on Fourier transform to merge
The schematic diagram that the four respective preferable parts of width image in Fig. 6 are merged by method, Fig. 7 A is
Second embodiment uses through image fusion method based on Fourier transform to four width in Fig. 6
The high fidelity visual that the respective preferable part of image obtains after merging, Fig. 7 B is input
Signal pattern；
Fig. 8 for third embodiment of the invention provide a kind of based on repeatedly phase matched process
The structural representation of nonlinear optics imaging device.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
Complete description, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on embodiments of the invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into the present invention
The scope of protection.
First embodiment
Fig. 2 shows that one that first embodiment of the invention provides is based on repeatedly phase matched mistake
The structural representation of the nonlinear optics imaging device of journey, as in figure 2 it is shown, the base of the present embodiment
In the nonlinear optics imaging device of repeatedly phase matched process, including: laser illuminator module 1,
Image receiver module 2, spatial frequency select module 3, parameter coupling image-forming module 4 and image
Processing module 5；Wherein:
Described laser illuminator module 1 sends illumination target object 0；Described image-receptive
Module 2 receives the light that described illumination light is reflected by target object 0, after forming target object image
Enter into described parameter coupling image-forming module 4；Described spatial frequency selects module 3 to adjust phase place
Match parameter；Described parameter coupling image-forming module 4 selects module 3 to adjust according to described spatial frequency
Whole phase matched parameter carries out image to described target object image at different space frequency
Strengthen, it is thus achieved that the target object 0 enhancing image at different space frequency；Described image procossing
Described parameter coupling image-forming module 4 is obtained by module 5 according to default spatial frequency transmission function
The target object 0 enhancing image at different space frequency carry out frequency-domain operations, it is achieved image
Merge, it is thus achieved that target object image enhanced high-fidelity fusion image；
Wherein, described phase matched parameter is according to phase matched parameter in nonlinear optical process
Pre-set with the one-to-one relationship of spatial frequency transmission function.
Specifically, described phase matched parameter is gain transfer function AFT, can pass according to gain
Delivery function ATF and phase misalignment dosage Δ k, pre-sets different ATF.
In a particular application, described image receiver module 2 can be preferably imaging lens group.
In a particular application, described laser illuminator module comprise the steps that illumination laser, shaping and
Transmitting optics element；
The laser that described illumination laser is launched is through described shaping and transmitting optics component shaping
After be irradiated to target object.
In a particular application, described spatial frequency selects module 3, it may include: pump laser,
Pumping laser shaping element, input coupling mirror and phase matched controller；
The pumping laser that described pump laser sends is through described pumping laser shaping optics unit
After the shaping of part, with the laser warp simultaneously of the target object image that described image receiver module is formed
Cross described input coupling mirror and incide the nonlinear optics in described parameter coupling image-forming module 4
Element；Described phase matched controller is by regulating angle or the temperature of described nonlinear optical element
Degree, it is achieved the control to phase misalignment dosage, thus realize different spatial frequencys and select.
Further, described phase matched controller can be angle controller, including: rotate
Platform or mirror holder, for regulating the angle of described nonlinear optical element, it is achieved to phase misalignment
The control of dosage, thus realize different spatial frequencys and select；Specifically, can pass according to gain
Delivery function ATF and phase misalignment dosage Δ k, and phase misalignment dosage Δ k and described nonlinear optical
Learn the relation of angle delta θ of element, preset different ATF, by regulation rotation platform or
Mirror holder changes angle delta θ of described nonlinear optical element, thus obtains different phase mismatch
Amount Δ k, and then make target object image be strengthened at different spatial frequencys.
Further, described phase matched controller can also be thermoregulator, is used for monitoring
And regulate the temperature of described nonlinear optical element, it is achieved the control to phase misalignment dosage, thus
Realize different spatial frequencys to select.
In a particular application, described spatial frequency selects module 3, it is also possible to including: synchronize control
Molding block (not shown), for entering described illumination laser and described pump laser
Line delay controls, it is achieved range gating, obtains different depth position by changing time delay
Target object image.
In a particular application, the illumination laser in described laser illuminator module 1 and described space
The operation mode of the pump laser in frequency-selecting module 3 can be to continuously run or arteries and veins
Punching operating, for pulse operates, pulsewidth can be the one in nanosecond, psec or femtosecond.
In a particular application, described parameter coupling image-forming module 4, including: nonlinear optics unit
Part, output coupling mirror, optical beam dump, Image relaying mirror group and linear array charge coupled cell CCD；
After described output coupling mirror, described picture is passed through by the light of described nonlinear optical element
Transmission mirror group incides imaging on described linear array charge coupled cell CCD, the target that will obtain
The object 0 enhancing image at different space frequency sends to described image processing module 5；Institute
State optical beam dump to collect by the veiling glare after described nonlinear optical element.
Specifically, described nonlinear optical element is preferably nonlinear crystal.
In a particular application, described image processing module 5, it may include: image pick-up card and place
Reason device；
Described image pick-up card receives the object that described linear array charge coupled cell CCD is formed
The body 0 enhancing image at different space frequency, described processor is according to the spatial frequency preset
Transmission function carries out frequency domain to the described target object 0 enhancing image at different space frequency
Operation, it is achieved image co-registration, it is thus achieved that target object image enhanced high-fidelity fusion image.
Specifically, described processor can use based on wavelet transformation, Fourier transform, main one-tenth
Analyze PCA or described target object 0 is existed by intensity tone saturation IHS conversion scheduling algorithm
Enhancing image at different space frequency carries out frequency-domain operations, it is achieved image co-registration, it is thus achieved that target
Subject image enhanced high-fidelity fusion image.
The nonlinear optics imaging device based on repeatedly phase matched process of the present embodiment, utilizes
Optically erasing process, strengthens target object image at different spatial frequencys, or profit
By the mode of conversion upper with frequency, target object image signal is carried out the conversion of frequency, improves whole
The efficiency of body, uses blending algorithm to obtain the image of high-fidelity the most again.Assembly of the invention,
Becoming apparent from particularly with weak picture signal effect, this has for remote probe and weak light detection
There is extremely important meaning
Second embodiment
Fig. 3 shows that one that second embodiment of the invention provides is based on repeatedly phase matched process
The structural representation of nonlinear optics imaging device, as it is shown on figure 3, the present embodiment based on
The repeatedly nonlinear optics imaging device of phase matched process, including: laser illuminator module 1,
Image receiver module 2, spatial frequency select module 3, parameter coupling image-forming module 4 and image
Processing module 5；
Described image receiver module 2 is imaging lens group；Described laser illuminator module includes: illumination
Laser instrument 101, shaping and transmitting optics element 102；Described spatial frequency selects module 3 to wrap
Include: pump laser 303, pumping laser shaping element 304, input coupling mirror 302
With rotation platform 301；Described parameter coupling image-forming module 4 includes: nonlinear crystal 401,
Output coupling mirror 402, optical beam dump 403, Image relaying mirror group 404 and linear array Charged Couple
Element CCD405；
Wherein, the laser illuminator that described illumination laser 101 is launched is through described shaping and transmitting
It is irradiated to target object 0 after optical element 102 shaping；Imaging lens group 2 receives described illumination and swashs
The light that light is reflected by target object, forms target object image；Described pump laser 303
The pumping laser gone out is after the shaping of described pumping laser shaping element 304, with imaging
The laser of the target object image that mirror group 2 is formed is simultaneously incident through described input coupling mirror 302
To nonlinear crystal 401；According to gain transfer function ATF and phase misalignment dosage Δ k, and
The relation (seeing Fig. 5) of angle delta θ of phase misalignment dosage Δ k and nonlinear crystal 401, in advance
If different ATF, regulated the angle delta of nonlinear crystal 401 by described rotation platform 301
θ, thus obtain different phase misalignment dosage Δ k, and then make target object image different
Strengthened at spatial frequency；By the light of nonlinear crystal 401 through described output coupling mirror
Described linear array charge coupled cell is incided by described Image relaying mirror group 404 after 402
The upper imaging of CCD405, by the target object 0 of acquisition enhancing image at different space frequency
Send to described image processing module 5；Optical beam dump 403 is collected by nonlinear crystal 401
After veiling glare；Described image processing module 5 transmits function to institute according to default spatial frequency
State parameter and mate the target object 0 of image-forming module 4 acquisition enhancing figure at different space frequency
As carrying out frequency-domain operations, it is achieved image co-registration, it is thus achieved that the enhanced high-fidelity of target object image
Fusion image.
In a particular application, described image processing module 5, it may include: image pick-up card and place
Reason device；
Described image pick-up card receives the mesh that described linear array charge coupled cell CCD405 is formed
The mark object 0 enhancing image at different space frequency, described processor is according to the space preset
The described target object 0 enhancing image at different space frequency is carried out by frequency transfer function
Frequency-domain operations, it is achieved image co-registration, it is thus achieved that the enhanced high-fidelity of target object image merges figure
Picture.
Specifically, described processor can use based on wavelet transformation, Fourier transform, main one-tenth
Analyze PCA or described target object 0 is existed by intensity tone saturation IHS conversion scheduling algorithm
Enhancing image at different space frequency carries out frequency-domain operations, it is achieved image co-registration, it is thus achieved that target
Subject image enhanced high-fidelity fusion image.
In the present embodiment, the optical maser wavelength that the laser illuminator module 1 of the present embodiment is launched can be excellent
Electing 1064nm as, pump laser 303 output wavelength is preferably 532nm laser, pumping
Optical power density is preferably 1GW/cm2, parameter coupling image-forming module 4 can be by object
The weak reflection light of body 0 carries out optically erasing, increases light energy, wherein nonlinear crystal
401 is bbo crystal, a length of 12.5mm, then uses directly figure based on Fourier transform
As fusion method, it is thus achieved that the image of high-fidelity；Fig. 4 is that the second embodiment is in out of phase amount of mismatch
Time ATF curve, figure includes that phase misalignment dosage is respectively 1.7cm-1、-3.7cm-1、-6.3cm-1、
-8.3cm-1Time ATF curve；A, B, C, D that Fig. 6 provides for the second embodiment are corresponding
Phase misalignment dosage is respectively 1.7cm-1、-3.7cm-1、-6.3cm-1、-8.3cm-1Time different spaces
Enhanced image at frequency；Fig. 7 is that the second embodiment employing is based on Fourier transform direct
The schematic diagram that the four respective preferable parts of width image in Fig. 6 are merged by image co-registration method,
Fig. 7 A is that the second embodiment uses through image fusion method based on Fourier transform in Fig. 6
The four respective preferable parts of width image merge after obtain high fidelity visual, Fig. 7 B is
The signal pattern of input.
The nonlinear optics imaging device based on repeatedly phase matched process of the present embodiment, it is possible to
Realize image in the enhancing of different space frequency, and different space frequency is transmitted under function
Image carries out information fusion, thus obtains the image of high-fidelity.
3rd embodiment
Fig. 8 shows that one that third embodiment of the invention provides is based on repeatedly phase matched mistake
The structural representation of the nonlinear optics imaging device of journey, as shown in Figure 8, the base of the present embodiment
In the nonlinear optics imaging device of repeatedly phase matched process and the difference of the second embodiment it is:
Rotation platform 301 is replaced with thermoregulator 301 '；
Wherein, the laser illuminator that described illumination laser 101 is launched is through described shaping and transmitting
It is irradiated to target object 0 after optical element 102 shaping；Imaging lens group 2 receives described illumination and swashs
The light that light is reflected by target object, forms target object image；Described pump laser 303
The pumping laser gone out is after the shaping of described pumping laser shaping element 304, with imaging
The laser of the target object image that mirror group 2 is formed is simultaneously incident through described input coupling mirror 302
To nonlinear crystal 401；Described thermoregulator 301 ' is by regulation nonlinear crystal 401
Temperature, it is achieved the control to phase misalignment dosage, thus realize different spatial frequency and select；
After described output coupling mirror 402, described Image relaying mirror is passed through by the light of nonlinear crystal 401
Group 404 incides imaging on described linear array charge coupled cell CCD405, the target that will obtain
The object 0 enhancing image at different space frequency sends to described image processing module 5；Light
Restraint the veiling glare after catcher 403 is collected by nonlinear crystal 401；Described image procossing mould
Described parameter coupling image-forming module 4 is obtained by block 5 according to default spatial frequency transmission function
The target object 0 enhancing image at different space frequency carries out frequency-domain operations, it is achieved image melts
Close, it is thus achieved that target object image enhanced high-fidelity fusion image.
In the present embodiment, the optical maser wavelength that the illumination laser 101 in the present embodiment is launched can
Being preferably 1.55 μm, belong to atmospheric window, atmospheric loss is relatively low.Pump laser 303 is defeated
Going out wavelength is preferably 1064nm, produces 631nm and swash in nonlinear crystal 401 and after frequency
Light, changes iraser to visible light wave range, thus by the laser signal scope of detection by visiting
Survey the tolerance inefficient spectrum conversion of son to the high wave band of quantum efficiency, wherein pumping light power
Density is 1GW/cm2, nonlinear crystal 401 is PPLN crystal.Pass through thermoregulator
The temperature of 301 regulation crystal changes phase misalignment dosage Δ k.
The nonlinear optics imaging device based on repeatedly phase matched process of the present embodiment, it is possible to
Realize image in the enhancing of different space frequency, and different space frequency is transmitted under function
Image carries out information fusion, thus obtains the image of high-fidelity.
It is last it is noted that various embodiments above is only in order to illustrate technical scheme,
It is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments,
It will be understood by those within the art that: it still can be to described in foregoing embodiments
Technical scheme modify, or the most some or all of technical characteristic carried out equivalent replace
Change；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the present invention each
The scope of embodiment technical scheme.
Claims (10)
1. a nonlinear optics imaging device based on repeatedly phase matched process, its feature
It is, including: laser illuminator module, image receiver module, spatial frequency select module, ginseng
Flux matched image-forming module and image processing module；Wherein:
Described laser illuminator module sends illumination target object；Described image receiver module
Receive the light that described illumination light is reflected by target object, after forming target object image, enter into institute
State parameter coupling image-forming module；Described spatial frequency selects module to adjust phase matched parameter；Institute
State the phase matched ginseng that parameter coupling image-forming module selects module to adjust according to described spatial frequency
Several described target object image is carried out at different space frequency image enhaucament, it is thus achieved that object
Body enhancing image at different space frequency；Described image processing module is according to the space preset
The target object that described parameter coupling image-forming module is obtained by frequency transfer function is in different spaces
Enhancing image at frequency carries out frequency-domain operations, it is achieved image co-registration, it is thus achieved that target object image
Enhanced high-fidelity fusion image；
Wherein, described phase matched parameter is according to phase matched parameter in nonlinear optical process
Pre-set with the one-to-one relationship of spatial frequency transmission function.
Device the most according to claim 1, it is characterised in that described image-receptive mould
Block is imaging lens group.
Device the most according to claim 1, it is characterised in that described laser illuminator mould
Block, including: illumination laser, shaping and transmitting optics element；
The laser that described illumination laser is launched is through described shaping and transmitting optics component shaping
After be irradiated to target object.
Device the most according to claim 3, it is characterised in that described spatial frequency is selected
Select module, including: pump laser, pumping laser shaping element, input coupling mirror and
Phase matched controller；
The pumping laser that described pump laser sends is through described pumping laser shaping optics unit
After the shaping of part, with the laser warp simultaneously of the target object image that described image receiver module is formed
Cross described input coupling mirror and incide the nonlinear optics unit in described parameter coupling image-forming module
Part；Described phase matched controller by regulating the angle of described nonlinear optical element or temperature,
Realize the control to phase misalignment dosage, thus realize different spatial frequencys and select.
Device the most according to claim 4, it is characterised in that described phase matched control
Device processed is angle controller, including rotation platform or mirror holder, is used for regulating described non-linear
The angle of optical element, it is achieved the control to phase misalignment dosage, thus realize different space frequencies
Rate selects.
Device the most according to claim 4, it is characterised in that described phase matched control
Device processed is thermoregulator, for monitoring and regulate the temperature of described nonlinear optical element, real
The now control to phase misalignment dosage, thus realize different spatial frequencys and select.
Device the most according to claim 4, it is characterised in that described spatial frequency is selected
Select module, also include: synchronization control module, for described illumination laser and described pumping
Laser instrument carries out delays time to control, it is achieved range gating, obtains different vertical by changing time delay
The target object image of deep position.
Device the most according to claim 4, it is characterised in that described parameter mates into
Picture module, including: nonlinear optical element, output coupling mirror, optical beam dump, Image relaying
Mirror group and linear array charge coupled cell CCD；
After described output coupling mirror, described picture is passed through by the light of described nonlinear optical element
Transmission mirror group incides imaging on described linear array charge coupled cell CCD, the target that will obtain
Object enhancing image at different space frequency sends to described image processing module；Described light
Bundle catcher is collected by the veiling glare after described nonlinear optical element.
Device the most according to claim 8, it is characterised in that described image procossing mould
Block, including: image pick-up card and processor；
Described image pick-up card receives the object that described linear array charge coupled cell CCD is formed
Body enhancing image at different space frequency, described processor passes according to the spatial frequency preset
Delivery function carries out frequency-domain operations to described target object enhancing image at different space frequency,
Realize image co-registration, it is thus achieved that target object image enhanced high-fidelity fusion image.
Device the most according to claim 9, it is characterised in that described processor is to institute
State target object enhancing image at different space frequency and carry out frequency-domain operations, it is achieved image melts
Close, it is thus achieved that the algorithm of target object image enhanced high-fidelity fusion image, including: based on
Wavelet transformation, Fourier transform, principal component analysis PCA or intensity tone saturation IHS become
The algorithm changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610531795.8A CN105911792A (en) | 2016-07-04 | 2016-07-04 | Nonlinear optical imaging device based on multiple phase matching processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610531795.8A CN105911792A (en) | 2016-07-04 | 2016-07-04 | Nonlinear optical imaging device based on multiple phase matching processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105911792A true CN105911792A (en) | 2016-08-31 |
Family
ID=56754439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610531795.8A Pending CN105911792A (en) | 2016-07-04 | 2016-07-04 | Nonlinear optical imaging device based on multiple phase matching processes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105911792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085342A (en) * | 2017-06-22 | 2017-08-22 | 哈尔滨理工大学 | The imaging system of increase optical nonlinearity efficiency based on 4f principles |
| CN109445227A (en) * | 2018-11-28 | 2019-03-08 | 安徽理工大学 | A kind of nonlinear optics imaging system of multiple phase matched |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060118765A (en) * | 2005-05-17 | 2006-11-24 | 학교법인단국대학 | System of second harmonic generation by which fast equilibrium phase-matching temperature of nonlinear optical crystal is reached |
| CN101191970A (en) * | 2006-11-20 | 2008-06-04 | 中国科学院西安光学精密机械研究所 | Ultrafast optical parametric image amplification method and equipment thereof |
| CN102316282A (en) * | 2011-09-20 | 2012-01-11 | 中国科学院理化技术研究所 | Image noise reduction device based on optics dolby |
| CN104076574A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院理化技术研究所 | Optical image enhancement device and method |
| CN104730800A (en) * | 2013-12-24 | 2015-06-24 | 中国科学院理化技术研究所 | Optical image enhancement method and device |
-
2016
- 2016-07-04 CN CN201610531795.8A patent/CN105911792A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060118765A (en) * | 2005-05-17 | 2006-11-24 | 학교법인단국대학 | System of second harmonic generation by which fast equilibrium phase-matching temperature of nonlinear optical crystal is reached |
| CN101191970A (en) * | 2006-11-20 | 2008-06-04 | 中国科学院西安光学精密机械研究所 | Ultrafast optical parametric image amplification method and equipment thereof |
| CN102316282A (en) * | 2011-09-20 | 2012-01-11 | 中国科学院理化技术研究所 | Image noise reduction device based on optics dolby |
| CN104076574A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院理化技术研究所 | Optical image enhancement device and method |
| CN104730800A (en) * | 2013-12-24 | 2015-06-24 | 中国科学院理化技术研究所 | Optical image enhancement method and device |
Non-Patent Citations (3)
| Title |
|---|
| 张腾飞等: "基于光参量变频与放大的高灵敏红外成像技术", 《物理学报》 * |
| 文侨等: "用于荧光显微镜的正交偏振滤波图像增强技术", 《中国激光》 * |
| 王伟伟: "4光参量微弱图像增强技术的实用化探索", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085342A (en) * | 2017-06-22 | 2017-08-22 | 哈尔滨理工大学 | The imaging system of increase optical nonlinearity efficiency based on 4f principles |
| CN109445227A (en) * | 2018-11-28 | 2019-03-08 | 安徽理工大学 | A kind of nonlinear optics imaging system of multiple phase matched |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10365221B2 (en) | Raman spectrum plane imaging device | |
| CN104375374B (en) | Ultra-fast laser continuous imaging device and method based on frequency domain space-time transformation | |
| JP4589965B2 (en) | Imaging system | |
| CN106996918B (en) | Terahertz imaging system based on photonics technology | |
| US8928802B2 (en) | Method and apparatus for producing high dynamic range (HDR) pictures, and exposure apparatuses for use therein | |
| CN106645081B (en) | Stimlated Raman spectrum imaging system based on quick scanning light path | |
| CN108363069A (en) | Associated imaging device and method based on distributed semiconductor laser array | |
| CN104458642A (en) | Rapid terahertz continuous wave scanning imaging system and method | |
| CN105683818B (en) | The flying-spot microscope of sample illumination with polarization | |
| CN102623874B (en) | Laser source device for coherent Raman scattering microscope system and production method of laser source device | |
| CN109238463A (en) | A kind of active EO-1 hyperion detection system of LED based low cost | |
| WO2016087393A1 (en) | Multi-wavelength generalized phase contrast system and method | |
| CN105911792A (en) | Nonlinear optical imaging device based on multiple phase matching processes | |
| CN105890754A (en) | Spectral imager integration calibration source system | |
| Hammack et al. | CH PLIF and PIV implementation using CX (0, 0) and intra-vibrational band filtered detection | |
| CN206876569U (en) | A kind of terahertz imaging system | |
| Wang et al. | Near-infrared speckle-illumination imaging based on a multidimensionally disordered fiber laser | |
| US11009772B2 (en) | Multi-frequency infrared imaging based on frequency conversion | |
| CN110954498A (en) | Terahertz wave high-spectrum imaging system based on frequency conversion | |
| DE602004000185T2 (en) | Multi-wavelength light source | |
| EP4194840A1 (en) | Dispersion measurement device and dispersion measurement method | |
| CN107238843A (en) | laser imaging control method and device | |
| Downes et al. | Ultra-high-speed terahertz imaging using atomic vapour | |
| Liang et al. | Ultrafast optical imaging | |
| Hashemi et al. | In situ measurement of laser beam quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160831 |
|
| RJ01 | Rejection of invention patent application after publication |