CN100443949C - Device for improving quality of optical imaging and method thereof - Google Patents

Device for improving quality of optical imaging and method thereof Download PDF

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Publication number
CN100443949C
CN100443949C CNB2007100781650A CN200710078165A CN100443949C CN 100443949 C CN100443949 C CN 100443949C CN B2007100781650 A CNB2007100781650 A CN B2007100781650A CN 200710078165 A CN200710078165 A CN 200710078165A CN 100443949 C CN100443949 C CN 100443949C
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fourier transform
optical
transform lens
lens
imaging
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CN101017244A (en
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田逢春
刘伟
陈建军
徐鑫
刘云宏
唐光菊
李立
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Shenzhen Tinno Wireless Technology Co Ltd
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Chongqing University
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Abstract

This invention discloses one device and method to improve optical imaging quality, wherein, the device comprises optical imaging system and computer and the imaging system is to send the information to computer. The invention is characterized by the following: it also comprises difference collection system to get different data e(m, n) and to send to computer; the computer gets final imaging data of fout2(m, n)=fout1(m, n)-e(m, n); with two steps for using optical imaging system to get imaging data fout1(m, n) and the difference collection system gets the difference data e(m, n); c, using compute to get final imaging data fout2(m, n).

Description

Improve the device and method of quality of optical imaging
Technical field
The invention belongs to a kind of optical image technology field, specifically, is a kind of device and method that improves quality of optical imaging.
Background technology
At present, in information optics, utilize optical device such as fourier transform lens, grating, holographic dry plate etc. directly to realize the Fourier transform of optical imagery, image filtering, image related operation etc., this technology progressively begins to be applied to image model identification, spatial filtering, noise cancellation etc.As shown in Figure 3: optical imaging system is by helium-neon laser, beam expanding lens, pin hole, collimation lens, first fourier transform lens, second fourier transform lens and first photoelectric commutator are formed, the light beam that helium-neon laser generates sends to pin hole with light beam after described beam expanding lens is handled, after this pin hole arrives described collimation lens with beam spread, obtain coherence's better parallel light beam, the input picture that light beam irradiates is original, and the optical information of described input picture is transmitted on described first fourier transform lens, after focusing on the spectrum face of first fourier transform lens, be transmitted to again on described second fourier transform lens, through second fourier transform lens with image information by the described first photoelectric commutator collection, this first photoelectric commutator is connected with computing machine, and the image information that computing machine utilizes first photoelectric commutator to gather obtains the corresponding imaging data f of output optical imagery Out1(m, n).
Can go out the square mean error amount MSE that it compares with original input picture with COMPUTER CALCULATION is:
MSE = Σ 0 ≤ m ≤ M Σ 0 ≤ n ≤ N ( f in ( m , n ) - f out 1 ( m , n ) ) 2 M × N ;
Its peak-to-peak snr value PSNR value is:
PSNR = 10 lo g 10 255 * 255 MSE .
F wherein In(m n) is the value of the pixel of input picture, f Out1(m n) is the value of the pixel of output image; M and n are respectively the locus coordinate figure of image, and M and N are the sizes of digital picture, 255 maximum gradation value for 8bit gray level image commonly used.
Output image peak-to-peak snr value PSNR as the 4f optical system has only about 17-20dB.
Its shortcoming is: because the influence of aberration, aberration and the factors such as optical device manufacturing process, optical system positioning error of coherent noise and lens causes the error of traditional optical imaging system very big.
Summary of the invention
The purpose of this invention is to provide a kind of device and method that improves quality of optical imaging, can overcome the influence of aberration, aberration and the factors such as optical device manufacturing process, optical system positioning error of coherent noise and lens, reduce the error of optical imaging system.
For achieving the above object, a kind of device that improves quality of optical imaging of the present invention, comprise optical imaging system, this optical imaging system is made up of light source, optical imaging apparatus and first photoelectric commutator, wherein optical imaging apparatus obtains the information of input optical imagery from light source, and the information that will import optical imagery is transmitted on described first photoelectric commutator, by this first photoelectric commutator collection, the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine again to; Its key is: also comprise the difference acquisition system, described difference acquisition system is made up of first optical splitter, second optical splitter, optics subtracter and second photoelectric commutator, wherein first optical splitter obtains the information of input optical imagery at the front end of described optical imaging apparatus, and is transmitted on the described optics subtracter; Second optical splitter obtains described output optical image information in the rear end of described optical imaging apparatus, and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is by the described second photoelectric commutator collection, this second photoelectric commutator is difference data e (m with the information translation of error image, n) after, send described computing machine again to; Described computing machine obtains final imaging data f Out2(m, n):
f Out2(m, n)=f Out1(m, n)-(m, n), m and n are respectively the locus coordinate figure of image to e.
Described light source is made up of helium-neon laser, beam expanding lens, pin hole, collimation lens, wherein the light beam of helium-neon laser generation is transmitted to pin hole behind described beam expanding lens, and by this pin hole with beam spread behind described collimation lens, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery gives described optical imaging apparatus;
Described optical imaging apparatus is made up of first fourier transform lens and second fourier transform lens, behind described first fourier transform lens of the information via of described input optical imagery, spectrum face place at first fourier transform lens obtains frequency spectrum, continue to be transmitted to described second fourier transform lens again, the information of described output optical imagery is shone described first photoelectric commutator through second fourier transform lens;
Described optics subtracter is made up of first reflective mirror, first imaging len, first liquid crystal light valve, polarization splitting prism, second liquid crystal light valve, the 3rd fourier transform lens, grating and the 4th fourier transform lens, after wherein said first reflective mirror receives the described input optical image information that described first spectrophotometric reflection goes out, reflex on described first imaging len, first imaging len is crossed in transmission again, be imaged onto described first liquid crystal light valve, read by described polarization splitting prism again; After the described output optical image information that described second spectrophotometric reflection goes out reflexes to described second liquid crystal light valve, read by described polarization splitting prism again; Described polarization splitting prism shines two group image informations described the 3rd fourier transform lens simultaneously, focus on the described grating by the 3rd fourier transform lens, and by after the Grating Modulation, be transmitted on described the 4th fourier transform lens, be transmitted on described second photoelectric commutator by described the 4th fourier transform lens, and obtain the difference data e that described difference acquisition system obtains (m, n), m and n are respectively the locus coordinate figure of image;
Described optics subtracter is provided with additional light source, should replenish light source is made up of second reflective mirror, collimation lens, pin hole, beam expanding lens and second helium-neon laser, described second helium-neon laser generates light beam and expands bundle through described beam expanding lens, shine on the described collimation lens by described pin hole again, generating one group of directional light by collimation lens is reflexed on the described polarization splitting prism by described second reflective mirror, and be polarized Amici prism and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve and second liquid crystal light valve, as the luminous energy input of described difference acquisition system.
Optical imaging system is the typical optical system of conventional known, obtains the imaging data f of input optical imagery Out1(m, n) and export to computing machine, optics difference acquisition system intercepts the output optical image information of input optical imagery and typical optical system from the typical optical system light path, and as two groups of input image informations of difference acquisition system, after being handled by polarization splitting prism, two groups of input image informations are again through the 3rd fourier transform lens and the 4th fourier transform lens, and by Grating Modulation, by second photoelectric commutator generate difference data e (m, n) and export to computing machine.
Described first optical splitter is between the described input optical imagery and first fourier transform lens, and the part optical information of described input optical imagery reflexed on described first reflective mirror, first reflective mirror reflexes to described first imaging len again, after first imaging len stands upside down the input optical imagery, be imaged onto described first liquid crystal light valve, read by described polarization splitting prism, as the first via image information input of optics difference acquisition system; Described second optical splitter is between described second fourier transform lens and first photoelectric commutator, and the image information that second fourier transform lens is generated reflexes to described second liquid crystal light valve, read by described polarization splitting prism, as the second road error image information input of optics difference acquisition system; Described second helium-neon laser generates light beam and expands bundle through described beam expanding lens, again by on the described collimation lens of irradiation after the described pin hole filtering, generating one group of directional light by collimation lens is reflexed on the described polarization splitting prism by described second reflective mirror, and be polarized Amici prism and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve and second liquid crystal light valve, as the luminous energy input of optics difference acquisition system.
Light path between described second liquid crystal light valve and the polarization splitting prism is provided with wave plate.
Wave plate can change light path.
Described light source is made up of helium-neon laser, beam expanding lens, pin hole, collimation lens, wherein the light beam of helium-neon laser generation is transmitted to pin hole behind described beam expanding lens, and by this pin hole with beam spread behind described collimation lens, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery gives described optical imaging apparatus;
Described optical imaging apparatus is made up of first fourier transform lens and second fourier transform lens, behind described first fourier transform lens of the information via of described input optical imagery, spectrum face place at first fourier transform lens obtains frequency spectrum, continue to be transmitted to described second fourier transform lens again, the information of described output optical imagery is shone described first photoelectric commutator through second fourier transform lens;
Described optics subtracter is made up of first reflective mirror, first imaging len, second imaging len, spectroscope, the 3rd fourier transform lens, grating and the 4th fourier transform lens, after wherein wherein said first reflective mirror receives the described input optical image information that described first spectrophotometric reflection goes out, reflex on described first imaging len, and see through first imaging len and second imaging len, see through described spectroscope again; The described output optical image information that described second spectrophotometric reflection goes out shines on the described spectroscope, described spectroscope shines two group image informations described the 3rd fourier transform lens simultaneously, focus on the described grating by the 3rd fourier transform lens, and by after the Grating Modulation, be transmitted on described the 4th fourier transform lens, be transmitted on described second photoelectric commutator by described the 4th fourier transform lens, and obtain the difference data e (m that described difference acquisition system obtains, n), m and n are respectively the locus coordinate figure of image.
Described input optical imagery is positioned at the two focus length place in described first imaging len the place ahead, and described first liquid crystal light valve is positioned at the two focus length place at the described first imaging len rear; Described first photoelectric commutator is positioned at one times of focal length place of described second fourier transform lens, and described second liquid crystal light valve is positioned at one times of focal length place of described second fourier transform lens.
Guarantee that optics difference acquisition system obtains error image information accurately.
A kind of method that improves quality of optical imaging, its key is:
Step 1, utilize optical imaging system to the input optical imagery carry out the imaging collection, obtain and import the corresponding imaging data f of optical imagery Out1(m, n), m and n are respectively the locus coordinate figure of image;
Described optical imaging system is made up of light source, optical imaging apparatus and first photoelectric commutator, wherein optical imaging apparatus obtains the information of input optical imagery from light source, and the information that will import optical imagery is transmitted on described first photoelectric commutator, by this first photoelectric commutator collection, the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine again to;
Step 2, on the basis of optical imaging system the parallel information that has difference acquisition system, this difference acquisition system to obtain described optical imaging system output optical image information and input optical imagery, draw difference data e (m, n);
Described difference acquisition system is made up of first optical splitter, second optical splitter, optics subtracter and second photoelectric commutator, wherein first optical splitter obtains the information of input optical imagery at the front end of described optical imaging apparatus, and reflexes on the described optics subtracter; Second optical splitter obtains described output optical image information in the rear end of described optical imaging apparatus, and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is by the described second photoelectric commutator collection, this second photoelectric commutator is difference data e (m with the information translation of error image, n) after, send computing machine again to;
Step 3, utilize the described imaging data f of described Computer Processing Out1(m, n) (m n), obtains final imaging data f with difference data e Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)。
Step 1 is to utilize known optical system to obtain imaging data f Out1(m, n), step 2 is in parallel optics difference acquisition system on known optical system, (m, n), step 3 is with the imaging data f through former optical system to obtain difference data e Out1(m, n) and through the difference data e of difference acquisition system (m n) notes, and deducts the latter then from the former, obtains relatively accurate described final imaging data f Out2(m, n).The present invention is applied to improve optical system imaging quality, reduces error, and simple and effective, improvement cost is low.In addition because quick, the parallel and high advantage of interconnection density that optical processing has will be saved the time of Flame Image Process greatly.
Described light source is made up of helium-neon laser, beam expanding lens, pin hole, collimation lens, wherein the light beam of helium-neon laser generation is transmitted to pin hole behind described beam expanding lens, and by this pin hole with beam spread behind described collimation lens, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery gives described optical imaging apparatus;
Described optical imaging apparatus is made up of first fourier transform lens and second fourier transform lens, behind described first fourier transform lens of the information via of described input optical imagery, spectrum face place at first fourier transform lens obtains frequency spectrum, continue to be transmitted to described second fourier transform lens again, the information of described output optical imagery is shone described first photoelectric commutator through second fourier transform lens.
Described optics subtracter is made up of first reflective mirror, first imaging len, first liquid crystal light valve, polarization splitting prism, second liquid crystal light valve, the 3rd fourier transform lens, grating and the 4th fourier transform lens, after wherein said first reflective mirror receives the described input optical image information that described first spectrophotometric reflection goes out, reflex on described first imaging len, first imaging len is crossed in transmission again, be imaged onto described first liquid crystal light valve, read by described polarization splitting prism again; After the described output optical image information that described second spectrophotometric reflection goes out reflexes to described second liquid crystal light valve, read by described polarization splitting prism again; Described polarization splitting prism shines two group image informations described the 3rd fourier transform lens simultaneously, focus on the described grating by the 3rd fourier transform lens, and by after the Grating Modulation, be transmitted on described the 4th fourier transform lens, be transmitted on described second photoelectric commutator by described the 4th fourier transform lens, and obtain the difference data e that described difference acquisition system obtains (m, n), m and n are respectively the locus coordinate figure of image;
Described optics subtracter is provided with additional light source, should replenish light source is made up of second reflective mirror, collimation lens, pin hole, beam expanding lens and second helium-neon laser, described second helium-neon laser generates light beam and expands bundle through described beam expanding lens, shine on the described collimation lens by described pin hole again, generating one group of directional light by collimation lens is reflexed on the described polarization splitting prism by described second reflective mirror, and be polarized Amici prism and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve and second liquid crystal light valve, as the luminous energy input of described difference acquisition system.
On the light path of described optical imaging system parallel have described optical differences value acquisition system, this optics difference acquisition system adopt full optical processing form obtain difference data e in the optical imaging system (m, n).
Described computing machine obtains relatively accurate described final imaging data f Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)。
Computing machine can adopt language such as Matlab, C language, Fortrun to obtain this final imaging data f Out2(m, n).
By comparatively validate, can obtain the peak-to-peak snr value PSNR value higher than existing optical imaging system to the present invention and existing optical imaging system.
Described optics subtracter also can be made up of first reflective mirror, first imaging len, second imaging len, spectroscope, the 3rd fourier transform lens, grating and the 4th fourier transform lens, after wherein said first reflective mirror receives the described input optical image information that described first spectrophotometric reflection goes out, reflex on described first imaging len, and see through first imaging len and second imaging len, see through described spectroscope again; The described output optical image information that described second spectrophotometric reflection goes out shines on the described spectroscope, described spectroscope shines two group image informations described the 3rd fourier transform lens simultaneously, focus on the described grating by the 3rd fourier transform lens, and by after the Grating Modulation, be transmitted on described the 4th fourier transform lens, be transmitted on described second photoelectric commutator by described the 4th fourier transform lens, and obtain the difference data e (m that described difference acquisition system obtains, n), m and n are respectively the locus coordinate figure of image.
Remarkable result of the present invention is: can overcome the influence of aberration, aberration and the factors such as optical device manufacturing process, optical system positioning error of coherent noise and lens, reduce the error of optical imaging system, have quick, parallel and the high advantage of interconnection density simultaneously, save the time of Flame Image Process.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is the method flow diagram that improves optical system imaging quality;
The structural representation of the existing optical imaging system of Fig. 3;
Fig. 4 is the structural representation of embodiment 1;
Fig. 5 is the structural representation of embodiment 2.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1: the device that improves quality of optical imaging, form 31 by optical imaging system, difference acquisition system and computing machine, wherein optical imaging system is made up of light source, optical imaging apparatus 30 and first photoelectric commutator 11, optical imaging apparatus 30 obtains the information of input optical imagery 5 from light source, and the information that will import optical imagery 5 is transmitted on described first photoelectric commutator 11, gather by this first photoelectric commutator 11, the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine 31 again to; Described difference acquisition system is made up of first optical splitter 6, second optical splitter 10, optics subtracter and second photoelectric commutator 21, wherein first optical splitter 6 obtains the information of input optical imagery 5 at the front end of described optical imaging apparatus 30, and is transmitted on the described optics subtracter; Second optical splitter 10 obtains described output optical image information in the rear end of described optical imaging apparatus 30, and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is gathered by described second photoelectric commutator 21, this second photoelectric commutator 21 is difference data e (m with the information translation of error image, n) after, send described computing machine 31 again to; Described computing machine 31 obtains final imaging data f Out2(m, n):
f Out2(m, n)=f Out1(m, n)-(m, n), m and n are respectively the locus coordinate figure of image to e.
As shown in Figure 4: described light source is made up of helium-neon laser 1, beam expanding lens 2, pin hole 3, collimation lens 4, wherein the light beam of helium-neon laser 1 generation is transmitted to pin hole 3 behind described beam expanding lens 2, and by this pin hole 3 with beam spread behind described collimation lens 4, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery 5 gives described optical imaging apparatus 30;
Described optical imaging apparatus 30 is made up of first fourier transform lens 7 and second fourier transform lens 9, behind described first fourier transform lens 7 of the information via of described input optical imagery 5, spectrum face 8 places at first fourier transform lens 7 obtain frequency spectrum, continue to be transmitted to described second fourier transform lens 9 again, the information of described output optical imagery is shone described first photoelectric commutator 11 through second fourier transform lens 9;
Described optics subtracter is made up of first reflective mirror 12, first imaging len 13, first liquid crystal light valve 14, polarization splitting prism 15, second liquid crystal light valve 16, the 3rd fourier transform lens 18, grating 19 and the 4th fourier transform lens 20, after wherein said first reflective mirror 12 receives described input optical imagery 5 information that described first optical splitter 6 reflects, reflex on described first imaging len 13, first imaging len 13 is crossed in transmission again, be imaged onto described first liquid crystal light valve 14, read by described polarization splitting prism 15 again; The described output optical image information that described second optical splitter 10 reflects is read by described polarization splitting prism 15 after reflexing to described second liquid crystal light valve 16 again; Described polarization splitting prism 15 shines two group image informations described the 3rd fourier transform lens 18 simultaneously, focus on the described grating 19 by the 3rd fourier transform lens 18, and by after grating 19 modulation, be transmitted on described the 4th fourier transform lens 20, be transmitted on described second photoelectric commutator 21 by described the 4th fourier transform lens 20, and obtain the difference data e that described difference acquisition system obtains (m, n);
Described optics subtracter is provided with additional light source, should replenish light source by second reflective mirror 22, collimation lens 23, pin hole 24, the beam expanding lens 25 and second helium-neon laser 26 are formed, described second helium-neon laser 26 generates light beam and expands bundle through described beam expanding lens 25, again by on the described collimation lens 23 of described pin hole 24 irradiations, generating one group of directional light by collimation lens 23 is reflexed on the described polarization splitting prism 15 by described second reflective mirror 22, and be polarized Amici prism 15 and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve 14 and second liquid crystal light valve 16, as the luminous energy input of described difference acquisition system.
Optical imaging system is existing 4f optical system, and this 4f optical system obtains the imaging data f of input optical imagery Out1(m, n) and export to computing machine, optics difference acquisition system intercepts input optical imagery and output optical image information from the light path of 4f optical system, and as two groups of input image informations of difference acquisition system, after being handled by polarization splitting prism 15, two groups of input image informations are again through the 3rd fourier transform lens 18 and the 4th fourier transform lens 20, and are modulated by grating 19, by second photoelectric commutator 21 generate difference data e (m, n) and export to computing machine.
Described first optical splitter 6 and second optical splitter 10 are 50% spectroscope.
Described first optical splitter 6 is between the described input optical imagery 5 and first fourier transform lens 7, and the part optical information of described input optical imagery 5 reflexed on described first reflective mirror 12, first reflective mirror 12 reflexes to described first imaging len 13 again, after first imaging len 13 stands upside down input optical imagery 5, be imaged onto described first liquid crystal light valve 14, read by described polarization splitting prism 15, as the first via image information input of optics difference acquisition system; Described second optical splitter 10 is between described second fourier transform lens 9 and first photoelectric commutator 11, and the image information that second fourier transform lens 9 is generated reflexes to described second liquid crystal light valve 16, read by described polarization splitting prism 15, as the second road error image information input of optics difference acquisition system; Described second helium-neon laser 26 generates light beam and expands bundle through described beam expanding lens 25, again by on the described collimation lens 23 of irradiation after described pin hole 24 filtering, generating one group of directional light by collimation lens 23 is reflexed on the described polarization splitting prism 15 by described second reflective mirror 22, and be polarized Amici prism 15 and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve 14 and second liquid crystal light valve 16, as the luminous energy input of optics difference acquisition system.
As shown in Figure 4: the light path between described second liquid crystal light valve 16 and the polarization splitting prism 15 is provided with wave plate 17.
This wave plate is 1/4 filter plate 17, can change light path.
First photoelectric commutator 11 and second photoelectric commutator 21 can adopt photoelectrical coupler.
Embodiment 2: this embodiment 2 is consistent with embodiment 1 structural principle, and its difference is:
As shown in Figure 5: described light source is made up of helium-neon laser 1, beam expanding lens 2, pin hole 3, collimation lens 4, wherein the light beam of helium-neon laser 1 generation is transmitted to pin hole 3 behind described beam expanding lens 2, and by this pin hole 3 with beam spread behind described collimation lens 4, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery 5 gives described optical imaging apparatus 30;
Described optical imaging apparatus 30 is made up of first fourier transform lens 7 and second fourier transform lens 9, behind described first fourier transform lens 7 of the information via of described input optical imagery 5, spectrum face 8 places at first fourier transform lens 7 obtain frequency spectrum, continue to be transmitted to described second fourier transform lens 9 again, the information of described output optical imagery is shone described first photoelectric commutator 11 through second fourier transform lens 9;
Described optics subtracter is made up of first reflective mirror 12, first imaging len 13, second imaging len 13 ', spectroscope 15 ', the 3rd fourier transform lens 18, grating 19 and the 4th fourier transform lens 20, after wherein wherein said first reflective mirror 12 receives described input optical imagery 5 information that described first optical splitter 6 reflects, reflex on described first imaging len 13, and see through first imaging len 13 and second imaging len 13 ', see through described spectroscope 15 ' again; The described output optical image information that described second optical splitter 10 reflects shines on the described spectroscope 15 ', described spectroscope 15 ' shines two group image informations described the 3rd fourier transform lens 18 simultaneously, focus on the described grating 19 by the 3rd fourier transform lens 18, and by after grating 19 modulation, be transmitted on described the 4th fourier transform lens 20, be transmitted on described second photoelectric commutator 21 by described the 4th fourier transform lens 20, and obtain the difference data e that described difference acquisition system obtains (m, n).
Shown in Fig. 4,5: as described in input optical imagery 5 be positioned at as described in the two focus length place in first imaging len, 13 the place aheads, described first liquid crystal light valve 14 is positioned at the two focus length place at described first imaging len 13 rears; Described first photoelectric commutator 11 is positioned at one times of focal length place of described second fourier transform lens 9, and described second liquid crystal light valve 16 is positioned at one times of focal length place of described second fourier transform lens 9.
Guarantee that optics difference acquisition system obtains error image information accurately.
Embodiment 3: as shown in Figure 1, 2: a kind of method that improves quality of optical imaging, wherein:
Step 1, utilize optical imaging system to the input optical imagery 5 carry out the imaging collection, obtain and import optical imagery 5 corresponding imaging data f Out1(m, n);
Described optical imaging system is made up of light source, optical imaging apparatus 30 and first photoelectric commutator 11, wherein optical imaging apparatus 30 obtains the information of input optical imagery 5 from light source, and the information that will import optical imagery 5 is transmitted on described first photoelectric commutator 11, gather by this first photoelectric commutator 11, the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine 31 again to;
Step 2, on the basis of optical imaging system the parallel information that has difference acquisition system, this difference acquisition system to obtain described optical imaging system output optical image information and input optical imagery 5, draw difference data e (m, n);
Described difference acquisition system is made up of first optical splitter 6, second optical splitter 10, optics subtracter and second photoelectric commutator 21, wherein first optical splitter 6 obtains the information of input optical imagery 5 at the front end of described optical imaging apparatus 30, and reflexes on the described optics subtracter; Second optical splitter 10 obtains described output optical image information in the rear end of described optical imaging apparatus 30, and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is gathered by described second photoelectric commutator 21, this second photoelectric commutator 21 is difference data e (m with the information translation of error image, n) after, send computing machine 31 again to;
Step 3, utilize described computing machine 31 to handle described imaging data f Out1(m, n) (m n), obtains final imaging data f with difference data e Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)。
Step 1 is to utilize known optical system to obtain imaging data f Out1(m, n), step 2 is in parallel optics difference acquisition system on known optical system, (m, n), step 3 is with the imaging data f through former optical system to obtain difference data e Out1(m, n) and through the difference data e of difference acquisition system (m n) notes, and deducts the latter then from the former, obtains relatively accurate described final imaging data f Out2(m, n).The present invention is applied to improve optical system imaging quality, reduces error, and simple and effective, improvement cost is low.In addition because quick, the parallel and high advantage of interconnection density that optical processing has will be saved the time of Flame Image Process greatly.
As shown in Figure 4: described light source is made up of helium-neon laser 1, beam expanding lens 2, pin hole 3, collimation lens 4, wherein the light beam of helium-neon laser 1 generation is transmitted to pin hole 3 behind described beam expanding lens 2, and by this pin hole 3 with beam spread behind described collimation lens 4, obtain coherence's better parallel light beam, parallel beam shines described input optical imagery 5 gives described optical imaging apparatus 30;
Described optical imaging apparatus 30 is made up of first fourier transform lens 7 and second fourier transform lens 9, behind described first fourier transform lens 7 of the information via of described input optical imagery 5, spectrum face 8 places at first fourier transform lens 7 obtain frequency spectrum, continue to be transmitted to described second fourier transform lens 9 again, the information of described output optical imagery is shone described first photoelectric commutator 11 through second fourier transform lens 9.
Described optics subtracter is made up of first reflective mirror 12, first imaging len 13, first liquid crystal light valve 14, polarization splitting prism 15, second liquid crystal light valve 16, the 3rd fourier transform lens 18, grating 19 and the 4th fourier transform lens 20, after wherein said first reflective mirror 12 receives described input optical imagery 5 information that described first optical splitter 6 reflects, reflex on described first imaging len 13, first imaging len 13 is crossed in transmission again, be imaged onto described first liquid crystal light valve 14, read by described polarization splitting prism 15 again; The described output optical image information that described second optical splitter 10 reflects is read by described polarization splitting prism 15 after reflexing to described second liquid crystal light valve 16 again; Described polarization splitting prism 15 shines two group image informations described the 3rd fourier transform lens 18 simultaneously, focus on the described grating 19 by the 3rd fourier transform lens 18, and by after grating 19 modulation, be transmitted on described the 4th fourier transform lens 20, be transmitted on described second photoelectric commutator 21 by described the 4th fourier transform lens 20, and obtain the difference data e that described difference acquisition system obtains (m, n);
Described optics subtracter is provided with additional light source, should replenish light source by second reflective mirror 22, collimation lens 23, pin hole 24, the beam expanding lens 25 and second helium-neon laser 26 are formed, described second helium-neon laser 26 generates light beam and expands bundle through described beam expanding lens 25, again by on the described collimation lens 23 of described pin hole 24 irradiations, generating one group of directional light by collimation lens 23 is reflexed on the described polarization splitting prism 15 by described second reflective mirror 22, and be polarized Amici prism 15 and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve 14 and second liquid crystal light valve 16, as the luminous energy input of described difference acquisition system.
On the light path of described optical imaging system parallel have described optical differences value acquisition system, this optics difference acquisition system adopt full optical processing form obtain difference data e in the optical imaging system (m, n).
Described computing machine obtains relatively accurate described final imaging data f Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)
Computing machine can adopt language such as Matlab, C language, Fortrun to obtain this final imaging data f Out2(m, n).
By comparatively validate, can obtain the peak-to-peak snr value PSNR value higher than existing optical imaging system to the present invention and existing optical imaging system
Described optics subtracter also can be made up of first reflective mirror 12, first imaging len 13, second imaging len 13 ', spectroscope 15 ', the 3rd fourier transform lens 18, grating 19 and the 4th fourier transform lens 20, after wherein said first reflective mirror 12 receives described input optical imagery 5 information that described first optical splitter 6 reflects, reflex on described first imaging len 13, and see through first imaging len 13 and second imaging len 13 ', see through described spectroscope 15 ' again; The described output optical image information that described second optical splitter 10 reflects shines on the described spectroscope 15 ', described spectroscope 15 ' shines two group image informations described the 3rd fourier transform lens 18 simultaneously, focus on the described grating 19 by the 3rd fourier transform lens 18, and by after grating 19 modulation, be transmitted on described the 4th fourier transform lens 20, be transmitted on described second photoelectric commutator 21 by described the 4th fourier transform lens 20, and obtain the difference data e that described difference acquisition system obtains (m, n).
The present invention and existing optical imaging system can be made comparisons by embodiment, can verify that the present invention can obtain the peak-to-peak snr value PSNR value higher than existing optical imaging system:
Select for use in the Flame Image Process in the standard picture commonly used 1024 * 1024 lena (m, n) as original input picture, its obtain exporting after through existing optical imaging system lena1 (m, n), the square mean error amount MSE that compares with original input picture 1Be:
MSE 1 = Σ 0 ≤ m ≤ 1024 Σ 0 ≤ n ≤ 1024 ( lena ( m , n ) - lena 1 ( m , n ) ) 2 1024 × 1024 .
Its peak-to-peak snr value PSNR 1Value is:
PSNR 1 = 10 log 10 255 × 255 MSE = 20.9765 dB .
And will obtain behind use the present invention than lena1 (m, n) more accurately output image lena2 (m, n), the square mean error amount MSE that it is compared with original input picture 2Be:
MSE 2 = Σ 0 ≤ m ≤ 1024 Σ 0 ≤ n ≤ 1024 ( lena ( m , n ) - lena 2 ( m , n ) ) 2 1024 × 1024 .
Its peak-to-peak snr value PSNR 2Value is:
PSNR 2 = 10 log 10 255 × 255 MSE 1 = 23.0135 dB .
In this example, under being 50% the condition of mean value of theoretical value, the AME of error harvester obtains The above results.If the precision of error harvester is higher, effect can be better.
Its working condition is as follows:
Obtain coherence's better parallel light behind the beam-expanding collimation system of the Gaussian beam that helium-neon laser 1 sends through beam expanding lens 2, pinhole filter 3 and collimation lens 4 compositions, after shining original input optical imagery 5, be divided into two bundles by first optical splitter 6, wherein a branch of is transmitted light, and another bundle is reflected light.Wherein transmitted light continues to be transmitted to the standard 4f system of first fourier transform lens 7 and second fourier transform lens, 9 compositions, is gathered and output to computing machine by first photoelectric commutator 11; Wherein reflected light reflexes to first reflective mirror 12 through spectroscope 6, shines the difference acquisition system, is imaged onto above first liquid crystal light valve 14 through first imaging len 13.
Obtain coherence's better parallel light behind the beam-expanding collimation system that Gaussian beam process beam expanding lens 25, pin hole 24 and the collimation lens 23 that sends from second helium-neon laser 26 formed in addition, being polarized Amici prism 15 reflexes to above first liquid crystal light valve 14, and reflect from first liquid crystal light valve 14, read image, see through polarization splitting prism 15 back irradiations the 3rd fourier transform lens 18, constitute one of input of difference acquisition system.The illumination of coming out from second fourier transform lens 9 is mapped to above second liquid crystal light valve 16, and successively by quarter wave plate 17 and polarization splitting prism 15, be polarized Amici prism 15 and read, shine the 3rd fourier transform lens 18 again, two of the input of formation difference acquisition system.Two inputs that enter the difference acquisition system are through the 3rd fourier transform lens 18 and the 4th fourier transform lens 20, and modulated by grating 19, obtain the output of difference acquisition system at the spectrum face of the 4th fourier transform lens 20, and gather the input computing machines with second photoelectric commutator 21.
Computing machine obtains described final imaging data f Out2(m n) is:
f out2(m，n)＝f out1(m，n)-e(m，n)。

Claims (9)

1, a kind of device that improves quality of optical imaging, comprise optical imaging system, this optical imaging system is made up of light source, optical imaging apparatus (30) and first photoelectric commutator (11), wherein optical imaging apparatus (30) obtains the information of input optical imagery (5) from light source, and the information that will import optical imagery (5) is transmitted on described first photoelectric commutator (11), gather by this first photoelectric commutator (11), the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine (31) again to; It is characterized in that: also comprise the difference acquisition system, described difference acquisition system is made up of first optical splitter (6), second optical splitter (10), optics subtracter and second photoelectric commutator (21), wherein first optical splitter (6) obtains the information of input optical imagery (5) at the front end of described optical imaging apparatus (30), and is transmitted on the described optics subtracter; Second optical splitter (10) obtains described output optical image information in the rear end of described optical imaging apparatus (30), and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is gathered by described second photoelectric commutator (21), this second photoelectric commutator (21) is difference data e (m with the information translation of error image, n) after, send described computing machine (31) again to; Described computing machine (31) obtains final imaging data f Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)；
M and n are respectively the locus coordinate figure of image.
2, a kind of device that improves quality of optical imaging according to claim 1, it is characterized in that: described light source is made up of helium-neon laser (1), beam expanding lens (2), pin hole (3), collimation lens (4), wherein the light beam of helium-neon laser (1) generation is transmitted to pin hole (3) behind described beam expanding lens (2), and by this pin hole (3) with beam spread behind described collimation lens (4), obtain coherence's better parallel light beam, parallel beam shines described input optical imagery (5) gives described optical imaging apparatus (30);
Described optical imaging apparatus (30) is made up of first fourier transform lens (7) and second fourier transform lens (9), behind described first fourier transform lens of the information via of described input optical imagery (5) (7), spectrum face (8) at first fourier transform lens (7) locates to obtain frequency spectrum, continue to be transmitted to described second fourier transform lens (9) again, the information of described output optical imagery is shone described first photoelectric commutator (11) through second fourier transform lens (9);
Described optics subtracter is by first reflective mirror (12), first imaging len (13), first liquid crystal light valve (14), polarization splitting prism (15), second liquid crystal light valve (16), the 3rd fourier transform lens (18), grating (19) and the 4th fourier transform lens (20) are formed, after wherein said first reflective mirror (12) receives described input optical imagery (5) information that described first optical splitter (6) reflects, reflex on described first imaging len (13), first imaging len (13) is crossed in transmission again, be imaged onto described first liquid crystal light valve (14), read by described polarization splitting prism (15) again; After the described output optical image information that described second optical splitter (10) reflects reflexes to described second liquid crystal light valve (16), read by described polarization splitting prism (15) again; Described polarization splitting prism (15) shines two group image informations described the 3rd fourier transform lens (18) simultaneously, focus on the described grating (19) by the 3rd fourier transform lens (18), and by after grating (19) modulation, be transmitted on described the 4th fourier transform lens (20), be transmitted on described second photoelectric commutator (21) by described the 4th fourier transform lens (20), and obtain the difference data e that described difference acquisition system obtains (m, n), m and n are respectively the locus coordinate figure of image;
Described optics subtracter is provided with additional light source, should replenish light source by second reflective mirror (22), collimation lens (23), pin hole (24), beam expanding lens (25) and second helium-neon laser (26) are formed, described second helium-neon laser (26) generates light beam and expands bundle through described beam expanding lens (25), shine on the described collimation lens (23) by described pin hole (24) again, generating one group of directional light by collimation lens (23) is reflexed on the described polarization splitting prism (15) by described second reflective mirror (22), and be polarized Amici prism (15) and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve (14) and second liquid crystal light valve (16), as the luminous energy input of described difference acquisition system.
3, a kind of device that improves quality of optical imaging according to claim 2 is characterized in that: the light path between described second liquid crystal light valve (16) and the polarization splitting prism (15) is provided with wave plate (17).
4, a kind of device that improves quality of optical imaging according to claim 1, it is characterized in that: described light source is made up of helium-neon laser (1), beam expanding lens (2), pin hole (3), collimation lens (4), wherein the light beam of helium-neon laser (1) generation is transmitted to pin hole (3) behind described beam expanding lens (2), and by this pin hole (3) with beam spread behind described collimation lens (4), obtain coherence's better parallel light beam, parallel beam shines described input optical imagery (5) gives described optical imaging apparatus (30);
Described optical imaging apparatus (30) is made up of first fourier transform lens (7) and second fourier transform lens (9), behind described first fourier transform lens of the information via of described input optical imagery (5) (7), spectrum face (8) at first fourier transform lens (7) locates to obtain frequency spectrum, continue to be transmitted to described second fourier transform lens (9) again, the information of described output optical imagery is shone described first photoelectric commutator (11) through second fourier transform lens (9);
Described optics subtracter is made up of first reflective mirror (12), first imaging len (13), second imaging len (13 '), spectroscope (15 '), the 3rd fourier transform lens (18), grating (19) and the 4th fourier transform lens (20), after wherein wherein said first reflective mirror (12) receives described input optical imagery (5) information that described first optical splitter (6) reflects, reflex on described first imaging len (13), and see through first imaging len (13) and second imaging len (13 '), see through described spectroscope (15 ') again; The described output optical image information that described second optical splitter (10) reflects shines on the described spectroscope (15 '), described spectroscope (15 ') shines two group image informations described the 3rd fourier transform lens (18) simultaneously, focus on the described grating (19) by the 3rd fourier transform lens (18), and by after grating (19) modulation, be transmitted on described the 4th fourier transform lens (20), be transmitted on described second photoelectric commutator (21) by described the 4th fourier transform lens (20), and obtain the difference data e (m that described difference acquisition system obtains, n), m and n are respectively the locus coordinate figure of image.
5, a kind of device that improves quality of optical imaging according to claim 2, it is characterized in that: described input optical imagery (5) is positioned at the two focus length place in described first imaging len (13) the place ahead, and described first liquid crystal light valve (14) is positioned at the two focus length place at described first imaging len (13) rear; Described first photoelectric commutator (11) is positioned at one times of focal length place of described second fourier transform lens (9), and described second liquid crystal light valve (16) is positioned at one times of focal length place of described second fourier transform lens (9).
6, a kind of method that improves quality of optical imaging is characterized in that:
Step 1, utilize optical imaging system to the input optical imagery (5) carry out the imaging collection, obtain and import the corresponding imaging data f of optical imagery (5) Out1(m, n), m and n are respectively the locus coordinate figure of image;
Described optical imaging system is made up of light source, optical imaging apparatus (30) and first photoelectric commutator (11), wherein optical imaging apparatus (30) obtains the information of input optical imagery (5) from light source, and the information that will import optical imagery (5) is transmitted on described first photoelectric commutator (11), gather by this first photoelectric commutator (11), the output optical image information that collects is converted to imaging data f Out1(m, n) after, send computing machine (31) again to;
Step 2, on the basis of optical imaging system the parallel information that has difference acquisition system, this difference acquisition system to obtain described optical imaging system output optical image information and input optical imagery (5), draw difference data e (m, n);
Described difference acquisition system is made up of first optical splitter (6), second optical splitter (10), optics subtracter and second photoelectric commutator (21), wherein first optical splitter (6) obtains the information of input optical imagery (5) at the front end of described optical imaging apparatus (30), and reflexes on the described optics subtracter; Second optical splitter (10) obtains described output optical image information in the rear end of described optical imaging apparatus (30), and reflex on the described optics subtracter, described optics subtracter subtracts each other two group image informations and obtains error image, this error image is gathered by described second photoelectric commutator (21), this second photoelectric commutator (21) is difference data e (m with the information translation of error image, n) after, send computing machine (31) again to;
Step 3, utilize described computing machine (31) to handle described imaging data f Out1(m, n) (m n), obtains final imaging data f with difference data e Out2(m, n):
f out2(m，n)＝f out1(m，n)-e(m，n)。
7, a kind of method that improves quality of optical imaging according to claim 6, it is characterized in that: described light source is made up of helium-neon laser (1), beam expanding lens (2), pin hole (3), collimation lens (4), wherein the light beam of helium-neon laser (1) generation is transmitted to pin hole (3) behind described beam expanding lens (2), and by this pin hole (3) with beam spread behind described collimation lens (4), obtain coherence's better parallel light beam, parallel beam shines described input optical imagery (5) gives described optical imaging apparatus (30);
Described optical imaging apparatus (30) is made up of first fourier transform lens (7) and second fourier transform lens (9), behind described first fourier transform lens of the information via of described input optical imagery (5) (7), spectrum face (8) at first fourier transform lens (7) locates to obtain frequency spectrum, continue to be transmitted to described second fourier transform lens (9) again, the information of described output optical imagery is shone described first photoelectric commutator (11) through second fourier transform lens (9).
8, a kind of method that improves quality of optical imaging according to claim 6, it is characterized in that: described optics subtracter is by first reflective mirror (12), first imaging len (13), first liquid crystal light valve (14), polarization splitting prism (15), second liquid crystal light valve (16), the 3rd fourier transform lens (18), grating (19) and the 4th fourier transform lens (20) are formed, after wherein said first reflective mirror (12) receives described input optical imagery (5) information that described first optical splitter (6) reflects, reflex on described first imaging len (13), first imaging len (13) is crossed in transmission again, be imaged onto described first liquid crystal light valve (14), read by described polarization splitting prism (15) again; After the described output optical image information that described second optical splitter (10) reflects reflexes to described second liquid crystal light valve (16), read by described polarization splitting prism (15) again; Described polarization splitting prism (15) shines two group image informations described the 3rd fourier transform lens (18) simultaneously, focus on the described grating (19) by the 3rd fourier transform lens (18), and by after grating (19) modulation, be transmitted on described the 4th fourier transform lens (20), be transmitted on described second photoelectric commutator (21) by described the 4th fourier transform lens (20), and obtain the difference data e that described difference acquisition system obtains (m, n), m and n are respectively the locus coordinate figure of image;
Described optics subtracter is provided with additional light source, should replenish light source by second reflective mirror (22), collimation lens (23), pin hole (24), beam expanding lens (25) and second helium-neon laser (26) are formed, described second helium-neon laser (26) generates light beam and expands bundle through described beam expanding lens (25), shine on the described collimation lens (23) by described pin hole (24) again, generating one group of directional light by collimation lens (23) is reflexed on the described polarization splitting prism (15) by described second reflective mirror (22), and be polarized Amici prism (15) and be divided into two road light and be transmitted to respectively on described first liquid crystal light valve (14) and second liquid crystal light valve (16), as the luminous energy input of described difference acquisition system.
9, a kind of method that improves quality of optical imaging according to claim 6, it is characterized in that: described optics subtracter is by first reflective mirror (12), first imaging len (13), second imaging len (13 '), spectroscope (15 '), the 3rd fourier transform lens (18), grating (19) and the 4th fourier transform lens (20) are formed, after wherein said first reflective mirror (12) receives described input optical imagery (5) information that described first optical splitter (6) reflects, reflex on described first imaging len (13), and see through first imaging len (13) and second imaging len (13 '), see through described spectroscope (15 ') again; The described output optical image information that described second optical splitter (10) reflects shines on the described spectroscope (15 '), described spectroscope (15 ') shines two group image informations described the 3rd fourier transform lens (18) simultaneously, focus on the described grating (19) by the 3rd fourier transform lens (18), and by after grating (19) modulation, be transmitted on described the 4th fourier transform lens (20), be transmitted on described second photoelectric commutator (21) by described the 4th fourier transform lens (20), and obtain the difference data e (m that described difference acquisition system obtains, n), m and n are respectively the locus coordinate figure of image.
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