CN103728866B - Incoherent triangular digital holography colorful three-dimensional imaging system and method - Google Patents
Incoherent triangular digital holography colorful three-dimensional imaging system and method Download PDFInfo
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Abstract
The present invention relates to a kind of incoherent triangular digital holography colorful three-dimensional imaging system and method.The system includes white light source, the first~six lens, the first~tri- interference filter element, the first and second polarizers, polarization splitting prism, the first and second speculums, image capture device, computer.It is characterized in that increasing Fourier transform lens on the basis of traditional triangle interferometer, while the first speculum normal direction is deviateed systematic optical axis, realize incoherent off-axis Fourier transform hologram record.Methods described generates by regarding three interference filter elements as lighting source to RGB quasi-monochromatic light caused by white light source progress narrow-band filtering and records three width holograms；Three width holograms are reproduced respectively in a computer, and registration is carried out to three width reproduction images；Merge three Color Channel reproduction images synthesis true color image.The present invention can quickly obtain the color hologram reproduction image of incoherent object, realize the three-dimensional colour imaging of incoherent object.
Description
Technical field
The invention belongs to digital hologram and 3 Dimension Image Technique field, is related to a kind of real based on incoherent Digital Holography
The System and method for of existing incoherent color three dimension imaging.
Background technology
Holography has the characteristics of carrying out three-dimensional imaging to object, just of great interest since invention.But
Dependence for coherent source greatly limit concrete application of the conventional photographic art in many fields.It is incoherent complete
Cease the appearance of art so that holography has broken away from the dependence for coherent source, and its application field is expanded into astronomical observation, biology
The noncoherence optics imaging field such as fluorescence.Coherence is derived from using the point of incoherent light source, by different methods to object
The light wave sent is split, and the three-dimensional information of object is encoded into a series of separate fresnel's zone plate intensity distributions
In, can be to realize the record of incoherent hologram.The Fresnel non-coherent combination holography proposed by J.Rosen in 2007
(Fresnel Incoherent Correlation holography, FINCH) uses spatial light modulator (Spatial
Light Modulator, SLM) beam splitter is used as, realize the record of the incoherent hologram of Non-scanning mode.
Imaging-PAM is due to excellent with high sensitivity, good selectivity, low ambient noise and high-contrast etc.
Point, the fields such as biomedicine, material science, pathology have been widely used in it.By incoherent holography and fluorescence imaging
Technology is combined, and can carry out three-dimensional imaging to fluorescent samples.Meanwhile if being re-introduced into color hologram technology, can obtain with
Fluorescence source provides multidimensional data information with the color reconstructed image of color for application.To achieve these goals, J.Rosen et al.
In its paper《Fluorescence incoherent color holography》（Optics Express15(2007),
2244-2250）In propose a kind of fluorescent color holographic imaging technology, realize fluorescent samples color three dimension imaging.But
This method record is in-line Fresnel holography figure, it is necessary to introduce the influence that multiexposure, multiple exposure phase-shifting technique eliminates twin image, and
Complex numerical operation is carried out to hologram, the recording process and reproduction speed of system are slower, it is difficult to realize to dynamic spline
Product real-time or quasi real time Three-dimensional Display.Further, since the lateral attitude of Fresnel hologram reproduction image and the record of hologram
Angle when distance and record between reference light and object light has substantial connection, causes three monochromes in Fresnel colour holography
The lateral attitude of reproduction image is difficult accuracy registration, causes the obscurity boundary of final color reconstructed image, reduces color reconstructed image
Quality.
The content of the invention
Incoherent color three dimension imaging method and above mentioned problem present in system are realized for existing, the present invention proposes one
Kind realizes the System and method for of incoherent color three dimension imaging based on incoherent Digital Holography, on the basis of triangle holography
On to light path configuration be improved, realize the record and 3-d reproduction of the off-axis Fourier transform hologram of incoherent object,
And the accuracy registration of three monochromatic reconstruction image lateral attitudes can be realized, obtains the color three dimension reproduction image of high quality.
To achieve these goals, the present invention adopts the following technical scheme that.
Incoherent triangular digital holography colorful three-dimensional imaging system, including：White light source 1, first, second, third,
4th, the 5th and the 6th lens 2,6,8,11,14 and 16, first, second, and third interference filter element 3,4 and 5, first and second is inclined
Shake piece 9 and 15, polarization splitting prism 10, the first and second speculums 12 and 13, image capture device 17, computer 18.White light
Light source 1 is located at the front focal plane position of the first lens 2, and the distance to the first lens 2 is fc1；Incoherent object 7 is located at the second lens 6
Back focal plane neighbouring position, the distance to the second lens 6 is fc2；Incoherent object 7 is located at the front focal plane of the 3rd lens 8, to
The distance of three lens 8 is f0, the first polarizer 9 is located at the back focal plane of the 3rd lens 8, and the distance to the 3rd lens 8 is f0；First
The distance of polarizer 9 to the 4th lens 11 and the 5th lens 14 is respectively their focal length f1And f2, the 4th lens 11 to the first are anti-
Penetrate the focal length sum apart from sum for the 4th lens 11 and the 5th lens 14 of the lens 14 of the speculum of mirror 12 to the second 13 to the 5th
f1+f2；The distance of second polarizer 15 to the 4th lens 11 and the 5th lens 14 is respectively their focal length f1And f2；6th is saturating
The distance of the polarizer of mirror 16 to the second 15 is two times of 2f of the focal length of lens 163；The lens 16 of image capture device 17 to the 6th away from
From two times of 2f for the focal length of lens 163。
Polarization splitting prism 10, lens 11 and lens 14, speculum 12 and speculum 13 form traditional triangle interferometer, from
The light wave sent on incoherent object 7 passes through by lens 11 and the structure of lens 14 along two different directions clockwise and counterclockwise
Into same telescopic system, there is different enlargement ratios by the light wave of system along the two directions, and due to they
The distance propagated in light path is identical so that the optical path difference between them is less than the temporal coherent length of light source.This two beam has
There are the strength information that incoherent object is have recorded in interference fringe caused by the light wave of different enlargement ratios and three-dimensional position letter
Breath.
Characterized in that, introducing the 3rd lens 8, the record of Fourier transform hologram is realized；Make the first reflection in light path
The normal direction of mirror 12 deviates systematic optical axis position, so as to introduce space carrier frequency in the hologram, realizes off-axis record；Image is adopted
Collect equipment 17 and record hologram, and Fast Fourier Transform (FFT) is carried out to the hologram recorded in computer 18 and obtains object 7
Reproduction image；Be filtered by three interference filter elements, 3,4 and 5 pairs of white light sources, respectively caused by use it is corresponding red,
The quasi-monochromatic light of green and blue optical band records three width holograms as system illumination light source, in computer 18 respectively
Three width holograms are reproduced, and calculated by coloured image enlargement ratio registration Algorithm and coloured image lateral attitude registration
Method carries out registration to three width reproduction images, obtains the RGB 3-d reproduction picture of object 7.
Described image collecting device 17 is the digital camera using CCD or CMOS chip as photo-sensitive cell.
First, second, and third interference filter element 3,4 and 5 is the narrow band filter with different centre wavelengths, its
Centre wavelength corresponds to red, green and blue wave band in visible light wave range respectively.
Realize that color three dimension imaging method comprises the following steps using imaging system of the present invention：
Step 1, the hologram of three Color Channels is obtained.
Step 1.1, white light source 1, image capture device 17 and computer 18 are opened, using the first interference filter element 3,
While ensureing that the first polarizer 9 is consistent with the optical axis direction of the second polarizer 15, be adjusted in synchronism two polarizers optical axis, make by
The contrast for the interference fringe that image capture device 17 collects reaches maximum, and will now interfere caused hologram to be saved in
In computer 18.
Step 1.2, Fast Fourier Transform (FFT) is carried out to the hologram collected in computer 18, and after viewing transformation
Whether image focuses accurately；If image defocus, the position of image capture device is adjusted until making after Fourier transformation
Image focusing it is accurate, record red channel hologram H nowR。
Step 1.3, the first interference filter element 3 is changed to the second interference filter element 4, repeat step 1.1,1.2, obtains green
Passage hologram HG。
Step 1.4, the second interference filter element 4 is changed to the 3rd interference filter element 5, repeat step 1.1,1.2 obtains blueness
Passage hologram HB。
Step 2, the reproduction image of three passages is obtained.
Step 2.1, respectively to three Color Channel hologram HR, HG, HBZero padding operation is carried out, three Color Channels of adjustment are holographic
The size of figure, makes the reproduction image of three individual color channels have identical enlargement ratio, and to the hologram A after zero paddingR, AG, ABPoint
Fast Fourier Transform (FFT) is not carried out, obtains reproduction image IR, IG, IB。
Step 2.2, reproduction image I is calculatedRAnd IGCoefficient correlation.
Step 2.3, the I of reproduction image two is adjusted in computer 18GHorizontal and vertical position.
Step 2.4, repeat step 2.2,2.3, until reproduction image IRAnd IGCoefficient correlation reach maximum, acquisition adjusted
The reproduction image I of positionG’。
Step 2.5, to reproduction image IRAnd IBRepeat step 2.2~2.4, obtain the reproduction image I for adjusting positionB’。
Step 3, three Color Channel reproduction images synthesis three-dimensional color image is merged.
Compared with prior art, the present invention has advantages below：
1. the present invention increases Fourier transform lens on the basis of the configuration of traditional triangle interferometer light path, and makes interference
One of speculum normal direction in instrument deviates systematic optical axis, realizes the record of Fourier transformation off-axis hologram, gram
The problem of having taken existing incoherent colour holograph image technical notes and slow reproduction speed and difficulty so that the record of hologram
Speed is fast, and reproducting method is simple.
2. the present invention to the hologram of each Color Channel by carrying out zero padding operation so that the reproduction of each Color Channel
As having identical enlargement ratio；Position by adjusting hologram reconstruction picture makes the coefficient correlation between them maximum, realizes
Three Color Channels reproduce the accurate alignment of image position, improve the quality of the color reconstructed image that is finally synthesizing.
Brief description of the drawings
Fig. 1 is system light path figure involved in the present invention；
Fig. 2 is the partial holograms of record of the embodiment of the present invention；
Fig. 3 is the reproduction image for the green channel that the embodiment of the present invention obtains；
Fig. 4 is relation song of the coefficient correlation with the position of wherein one for certain two reproduction image that the embodiment of the present invention obtains
Line, (a) are the relation curve with lateral attitude, and (b) is the relation curve with lengthwise position；
Fig. 5 is the RGB reproduction image that the embodiment of the present invention obtains through color integration.
In Fig. 1：1- white light sources, the lens of 2- first, the interference filter elements of 3- first, the interference filter elements of 4- second, 5- the 3rd
Interference filter element, the lens of 6- second, the incoherent objects of 7-, the lens of 8- the 3rd, the polarizers of 9- first, 10- polarization splitting prisms,
The lens of 11- the 4th, the speculums of 12- first, the speculums of 13- second, the lens of 14- the 5th, the polarizers of 15- second, 16- the 6th are saturating
Mirror, 17- image capture devices, 18- computers.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
The system light path figure of imaging system of the present invention as shown in figure 1, including：White light source 1, first, second,
3rd, the four, the 5th and the 6th lens 2,6,8,11,14 and 16, first, second, and third interference filter element 3,4 and 5, the first He
Second polarizer 9 and 15, polarization splitting prism 10, the first and second speculums 12 and 13, image capture device 17, computer
18。
The light that white light source 1 is sent becomes the directional light of collimation after the convergence of the first lens 2, is filtered by the first interference
It is changed into quasi-monochromatic light after wave plate 3, converges the incoherent object 7 of back lighting by the second lens 6, the reflected light of incoherent object is passed through
After the convergence of 3rd lens 8, linearly polarized light is changed into by the first polarizer 9, and be decomposed into just by polarization splitting prism 10
Hand over two parts of polarization state：The light of wherein perpendicular polarisation state is propagated along clockwise direction, that is, the 4th lens 11 is first passed through, by first
Reflected after the reflection of the speculum 13 of speculum 12 and second by the 5th lens 14, and by polarization splitting prism 10；Horizontal state of polarization
Light propagate in the counterclockwise direction, that is, first pass through the 5th lens 14, after being reflected by the second speculum 13 and the first speculum 12 lead to
The 4th lens 11 are crossed, and pass through polarization splitting prism 10.The light propagated along both direction turns into tool after the second polarizer 15
There is the light of consistent polarization state, the surface of image capture device 17 is reached after the 6th lens 16 and produces interference, what is formed is complete
Breath figure is recorded and is stored in computer 18 by image capture device 17.
The method of color three dimension imaging is carried out using imaging system of the present invention includes herein below：
1. obtain the hologram of three Color Channels
（1）White light source 1, image capture device 17 and computer 18 are opened, uses the first interference filter element 3（Center
Wavelength X1Corresponding red band）, ensure to be adjusted in synchronism two while the first polarizer 9 is consistent with the optical axis direction of the second polarizer 15
The optical axis of individual polarizer so that the contrast for the interference fringe that image capture device 17 collects reaches maximum, and will now do
Hologram caused by relating to is recorded.Fast Fourier Transform (FFT) is carried out to the hologram collected in computer 18, and observed
Whether the reproduction image after conversion accurately focuses；If reproducing image defocus, the front and rear position for changing image capture device 17,
It is accurate until reproducing image focusing, and preserve red channel hologram H nowR, write down now image capture device 17 to
The distance D of six lens 161。
（2）Use the second interference filter element 4（Central wavelength lambda2Corresponding green band）, repeat step（1）, and preserve now
Green channel hologram HG, write down the distance D of the now lens 16 of image capture device 17 to the 6th2.The hologram of acquisition is for example attached
Shown in Fig. 2.
（3）Use the 3rd interference filter element 5（Central wavelength lambda3Corresponding blue wave band）, repeat step（1）, and preserve now
Blue channel hologram HB, write down the distance D of the now lens 16 of image capture device 17 to the 6th3。
2. obtain three Color Channel reproduction images
（1）According to following formula adjustment red, green and blue channel hologram HR、HGAnd HBSize so that three passages
Reproduction image has identical enlargement ratio.
N1:N2:N3=λ1D1:λ2D2:λ3D3 (1)
Wherein, N1 2、N2 2And N3 2Three passage hologram A after corresponding adjustmentR、AGAnd ABSize（Pixel count）；λ1、λ2With
λ3It is three passage hologram HR, HG, HBCorresponding wavelength；D1、D2And D3It is recording distance corresponding to three passage holograms.It is real
In the operation of border, the size of blue channel hologram is chosen（Pixel count）As benchmark, pass through（1）Red and green needed for formula calculating
The size of passage hologram, zero padding operation is carried out to the red and the hologram of green channel that actually photographed, makes its big Grain Full
Foot（1）Proportionate relationship shown in formula.
（2）To step（1）In obtain be sized after three hologram AR、AGAnd ABFourier transformation is carried out, is obtained
Three reproduction image I with identical enlargement ratioR, IG, IB.The reproduction image of green channel is as shown in Figure 3.
（3）Resulting three reproduction images with identical enlargement ratio are cut into formed objects, so as to subsequent operation.
（4）To step（3）The reproduction image of three resulting passages carries out lateral attitude accuracy registration.Choose red channel
Reproduction image IRAs benchmark, by green channel reproduction image IGIt is registering with its.
First, the coefficient correlation between the two reproduction images is calculated according to following formula：
Wherein, r is coefficient correlation；I1And I2For the intensity of the reproduction image of two passages after vectorization；I is member in vector
The sequence number of element, i=1,2 ..., n, n are the element number of vector；E is the average value of vector；σ is the standard deviation of vector.
Then, green channel reproduction image I is changed respectivelyGTransverse direction, lengthwise position so that according to（2）The phase that formula calculates
Relation number reaches maximum, and the reproduction image of fixed green channel is current horizontal, lengthwise position.Coefficient correlation is with green channel
The transverse direction of reproduction image, the change curve of length travel are respectively such as accompanying drawing 4（a）With 4（b）It is shown.Coefficient correlation maximum pair in figure
Transverse direction, the lengthwise position answered are final defined location.
（5）Repeat step（4）, by blue channel reproduction image IBWith red channel benchmark reproduction image IRCarry out registration.
3. merge three Color Channel reproduction images synthesis three-dimensional color image
（1）Calculate the intensity of the previously obtained reproduction image with three passages of identical enlargement ratio and size identical
Between ratio：
K1:K2:K3=Iλ1QE1:Iλ2QE2:Iλ3QE3 (3)
Wherein, K1、K2And K3For the intensity of three passages after adjustment；Iλ1、Iλ2And Iλ3For three at image capture device 17
The luminous intensity of passage；QE1、QE2And QE3For the quantum efficiency of image capture device 17 corresponding to three channel center's wavelength；
（2）By step（1）Obtained K1、K2And K3Ratio be directly multiplied with the reproduction images of corresponding three passages, then
Synthesized according to RGB image synthetic method, obtain final RGB reproduction image.As shown in Figure 5.
Claims (6)
1. incoherent triangular digital holography colorful three-dimensional imaging system, including：White light source (1), the first lens (2), first is dry
Relate to filter plate (3), the second interference filter element (4), the 3rd interference filter element (5), the second lens (6), incoherent object (7),
Three lens (8), the first polarizer (9), polarization splitting prism (10), the 4th lens (11), the first speculum (12), the second reflection
Mirror (13), the 5th lens (14), the second polarizer (15), the 6th lens (16), image capture device (17), computer (18)；
White light source (1) is located at the front focal plane position of the first lens (2), and the distance of white light source (1) to the first lens (2) is fc1；It is non-
Phase dried object (7) is located at the back focal plane neighbouring position of the second lens (6), and incoherent object (7) is to the distance of the second lens (6)
fc2；Incoherent object (7) is located at the front focal plane of the 3rd lens (8), and incoherent object (7) to the distance of the 3rd lens (8) is f0,
First polarizer (9) is located at the back focal plane of the 3rd lens (8), and the distance of the first polarizer (9) to the 3rd lens (8) is f0；The
The distance of one polarizer (9) to the 4th lens (11) is focal length f1, the 4th lens (11) to the first speculum (12), the first reflection
Mirror (12) to the second speculum (13), the second speculum (13) to the 5th lens (14) apart from sum be the 4th lens (11) with
The focal length sum f of 5th lens (14)1+f2；The distance of second polarizer (15) to the 5th lens (14) is focal length f2；6th is saturating
The distance of mirror (16) to the second polarizer (15) is the two times i.e. 2f of the 6th lens (16) focal length3；Image capture device (17) is extremely
The distance of 6th lens (16) is the two times i.e. 2f of the 6th lens (16) focal length3；Above-mentioned distance is referred to along optical path direction
Distance；
Polarization splitting prism (10), the 4th lens (11) and the 5th lens (14), the first speculum (12) and the second speculum
(13) traditional triangle interferometer is formed, image is entered after the 6th lens (16) by the light after polarization splitting prism (10) again
Collecting device (17)；
White light source (1) enters the second lens (6) after the first lens (2), through interference filter element, then by incoherent
After object (7), then sequentially pass through the 3rd lens (8), the first polarizer (9)；
The light wave sent from incoherent object (7) passes through by the 4th lens along two different directions clockwise and counterclockwise
(11) and the 5th lens (14) form same telescopic system, there is different put by the light wave of system along the two directions
Big multiplying power, and due to the complete phase of distance propagated in the optical path along the light wave on two different directions clockwise and counterclockwise
Together so that along the optical path difference between the light wave on two different directions clockwise and counterclockwise be less than white light source (1) when
Between coherence length；This two beam, which has, have recorded incoherent object (7) in interference fringe caused by the light wave of different enlargement ratios
Strength information and three dimensional local information；
Characterized in that, introducing the 3rd lens (8), the record of Fourier transform hologram is realized；Make the first speculum in light path
(12) normal direction deviates systematic optical axis position, so as to introduce space carrier frequency in the hologram, realizes off-axis record；Image is adopted
Collect equipment (17) record hologram, and in computer (18) hologram that is recorded is carried out Fast Fourier Transform (FFT) obtain it is non-
The reproduction image of phase dried object (7)；Pass through the first interference filter element (3), the second interference filter element (4), the 3rd interference filter element (5)
White light source (1) is filtered, use respectively caused by correspond to the quasi-monochromatic light conduct of red, green and blue optical band
The illumination light of system, and three width holograms are recorded, three width holograms are reproduced respectively in computer (18), and pass through coloured silk
Color image enlargement ratio registration Algorithm and coloured image lateral attitude registration Algorithm carry out registration to three width reproduction images, obtain non-
The RGB 3-d reproduction picture of phase dried object (7).
2. incoherent triangular digital holography colorful three-dimensional imaging system according to claim 1, it is characterised in that the figure
As collecting device (17) is the digital camera using CCD or CMOS chip as photo-sensitive cell.
3. incoherent triangular digital holography colorful three-dimensional imaging system according to claim 1, it is characterised in that described
One interference filter element (3), the second interference filter element (4), the 3rd interference filter element (5) are that the arrowband with different centre wavelengths is filtered
Ripple device, its centre wavelength correspond to red, green and blue wave band in visible light wave range respectively.
4. the method for three-dimensional imaging is carried out using incoherent triangular digital holography colorful three-dimensional imaging system described in claim 1,
It is characterized in that：Comprise the following steps,
Step 1, the hologram of three Color Channels is obtained；
Step 1.1, white light source (1), image capture device (17) and computer (18) are opened, uses the first interference filter element
(3) while, ensureing that the first polarizer (9) is consistent with the second polarizer (15) optical axis direction, two polarizers of synchronous adjustment
Optical axis, the contrast for the interference fringe for making to be collected by image capture device (17) reaches maximum, and will now interfere caused
Hologram is saved in computer (18)；
Step 1.2, Fast Fourier Transform (FFT), and the figure after viewing transformation are carried out to the hologram collected in computer (18)
Seem that no focusing is accurate；If image defocus, the position of image capture device is adjusted until the figure after Fourier transformation
As focusing accurately, red channel hologram H now is recordedR, write down now image capture device (17) to the 6th lens (16)
Distance D1；
Step 1.3, the first interference filter element (3) is changed to the second interference filter element (4), repeat step 1.1,1.2, obtains green
Passage hologram HG, write down now image capture device (17) to the distance D of the 6th lens (16)2；
Step 1.4, the second interference filter element (4) is changed to the 3rd interference filter element (5), repeat step 1.1,1.2 obtains blueness
Passage hologram HB, write down now image capture device (17) to the distance D of the 6th lens (16)3；
Step 2, the reproduction image of three passages is obtained；
Step 2.1, respectively to three Color Channel hologram HR, HG, HBZero padding operation is carried out, three Color Channel holograms of adjustment
Size, makes the reproduction image of three individual color channels have identical enlargement ratio, and to the hologram A after zero paddingR, AG, ABEnter respectively
Row Fast Fourier Transform (FFT), obtain reproduction image IR, IG, IB；
Step 2.2, reproduction image I is calculatedRAnd IGCoefficient correlation, formula is as follows：
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Wherein, r is coefficient correlation；I1And I2For the intensity of the reproduction image of two passages after vectorization；I is element in vector
Sequence number, i=1,2 ..., n, n are the element number of vector；E is the average value of vector；σ is the standard deviation of vector；
Step 2.3, the adjustment reproduction image I in computer (18)GHorizontal and vertical position；
Step 2.4, repeat step 2.2,2.3, until reproduction image IRAnd IGCoefficient correlation reach maximum, acquisition adjusted position
Reproduction image IG’；
Step 2.5, to reproduction image IRAnd IBRepeat step 2.2~2.4, obtain the reproduction image I for adjusting positionB’；
Step 3, three Color Channel reproduction images synthesis three-dimensional color image is merged.
5. three-D imaging method according to claim 4, it is characterised in that the step 2.1 makes three individual color channels
It is to adjust three Color Channel hologram sizes according to following formula that reproduction image, which has the method for identical enlargement ratio,：
N1:N2:N3=λ1D1:λ2D2:λ3D3 (2)
Wherein, N1 2、N2 2And N3 2Three passage hologram A after respectively adjustingR、AGAnd ABSize, i.e. pixel count；λ1、λ2And λ3
Respectively three passage hologram HR, HG, HBCorresponding wavelength；D1、D2And D3Respectively record corresponding to three passage holograms away from
From；In practical operation, on the basis of the size for choosing blue channel hologram, pass through red and green channel needed for the calculating of (2) formula
The size of hologram, zero padding operation is carried out to the red and the hologram of green channel that actually photographed, its size is met (2)
Proportionate relationship shown in formula.
6. three-D imaging method according to claim 4, it is characterised in that the step 3 merges three Color Channels and reproduced
As synthesis three-dimensional color image is further comprising the steps of：
Step 3.1, the intensity of the previously obtained reproduction image with three passages of identical enlargement ratio and size identical is calculated
Between ratio：
K1:K2:K3=Iλ1QE1:Iλ2QE2:Iλ3QE3 (3)
Wherein, K1、K2And K3The intensity of three passages after respectively adjusting；Iλ1、Iλ2And Iλ3Respectively image capture device (17)
Locate the luminous intensity of three passages；QE1、QE2And QE3Image capture device (17) respectively corresponding to three channel center's wavelength
Quantum efficiency；
Step 3.2, by K1、K2And K3Ratio be directly multiplied with the reproduction images of corresponding three passages, then according to RGB image
Synthetic method synthesizes, and obtains final RGB reproduction image.
Priority Applications (1)
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| CN108459485B (en) * | 2018-01-19 | 2019-09-20 | 中国科学院上海光学精密机械研究所 | The incoherent correlated digital holography generation device of Fresnel based on plane of polarization lens |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570779A (en) * | 2003-03-14 | 2005-01-26 | Tdk株式会社 | Holographic recording and reproducing apparatus |
| CN202372770U (en) * | 2011-12-20 | 2012-08-08 | 浙江师范大学 | Optical encryption device based on two-step phase-shift interference and fractional Fourier transform |
| CN103000191A (en) * | 2012-12-04 | 2013-03-27 | 清华大学 | Dynamic refresh volume holographic three-dimensional displaying method |
| CN103257441A (en) * | 2013-05-13 | 2013-08-21 | 北京工业大学 | Incoherent digital holography three-dimensional dynamic microscopic imaging system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004144847A (en) * | 2002-10-22 | 2004-05-20 | Sony Corp | Apparatus and method of recording holographic information, and apparatus and method of reproducing holographic information |
| JP2008159235A (en) * | 2006-11-28 | 2008-07-10 | Fuji Xerox Co Ltd | Hologram recording device and method, and hologram reproducing device and method |
-
2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570779A (en) * | 2003-03-14 | 2005-01-26 | Tdk株式会社 | Holographic recording and reproducing apparatus |
| CN202372770U (en) * | 2011-12-20 | 2012-08-08 | 浙江师范大学 | Optical encryption device based on two-step phase-shift interference and fractional Fourier transform |
| CN103000191A (en) * | 2012-12-04 | 2013-03-27 | 清华大学 | Dynamic refresh volume holographic three-dimensional displaying method |
| CN103257441A (en) * | 2013-05-13 | 2013-08-21 | 北京工业大学 | Incoherent digital holography three-dimensional dynamic microscopic imaging system and method |
Non-Patent Citations (1)
| Title |
|---|
| 光全息中傅里叶变换透镜设计;王刚 等;《光电工程》;20111130;第38卷(第11期);第141-145页 * |
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