CN107422623A - A kind of color hologram zoom system, pancreatic system based on liquid lens - Google Patents
A kind of color hologram zoom system, pancreatic system based on liquid lens Download PDFInfo
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- CN107422623A CN107422623A CN201710890543.9A CN201710890543A CN107422623A CN 107422623 A CN107422623 A CN 107422623A CN 201710890543 A CN201710890543 A CN 201710890543A CN 107422623 A CN107422623 A CN 107422623A
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- 239000007788 liquid Substances 0.000 title claims abstract description 122
- 239000000758 substrate Substances 0.000 claims description 27
- 230000000694 effects Effects 0.000 claims description 10
- 230000004075 alteration Effects 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- -1 infrabasal plate Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
- G03H1/12—Spatial modulation, e.g. ghost imaging
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2249—Holobject properties
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2294—Addressing the hologram to an active spatial light modulator
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
- G03H2001/221—Element having optical power, e.g. field lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
- G03H2001/2213—Diffusing screen revealing the real holobject, e.g. container filed with gel to reveal the 3D holobject
- G03H2001/2215—Plane screen
- G03H2001/2218—Plane screen being perpendicular to optical axis
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2249—Holobject properties
- G03H2001/2263—Multicoloured holobject
- G03H2001/2271—RGB holobject
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H2001/266—Wavelength multiplexing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/20—2D object
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/10—Spectral composition
- G03H2222/17—White light
- G03H2222/18—RGB trichrome light
Abstract
The present invention relates to a kind of color hologram zoom system, pancreatic system based on liquid lens.Present invention aim to address the ropy technical problem of complicated, operating difficulties and reproduction image existing for existing holographic 3D zoom system, pancreatic systems.The technical solution adopted by the present invention is：A kind of color hologram zoom system, pancreatic system based on liquid lens, it includes three-color light source, Amici prism, spatial light modulator, computer, liquid lens, receiving screen and synchronization control circuit；The three-color light source is located in the input path of Amici prism, and the spatial light modulator is located on the reflected light path of Amici prism, and the liquid lens is located at behind spatial light modulator, and the receiving screen is located at behind liquid lens；The three-color light source is radiated in spatial light modulator respectively after Amici prism, and the light source controlled through spatial light modulator projects receiving screen by the zoom of liquid lens；The synchronization control circuit ensures that light source, hologram are consistent with the switching time of liquid lens.
Description
Technical field
The present invention relates to a kind of color hologram zoom system, pancreatic system based on liquid lens, it belongs to holography field.
Background technology
Successively has there is spectacle 3D display, multiple views 3D display, complete since the eighties in last century in three-dimensional (3D) display
Cease the various ways such as 3D display.Wherein holographic 3D display is capable of the wavefront of complete documentation and reconstruction 3D objects, there is provided human eye vision
Full depth information needed for system, thus the ultimate aim of 3D display is broadly considered in the world.Reproduced to adjust
The size of picture, traditional method are to be reproduced by the relative position between the position of mechanically mobile lens or lens group to change
The position of picture, so as to change the size of reproduction image.The system of this method, which is usually relatively complex, to be difficult to operate, if wanting to realize colour
The reconstruction of hologram, system are more difficult to operate.Some scholars propose to realize lensless holographic scaling using the Fresel diffraction of scaling
Projection.By calculating the different sample rates in projected image and holographic facet, the effect of zoom is realized.However as changing for sample rate
Become, the quality of reproduction image can also influence.When sample rate exceedes certain limit, reproduction image even occurs that distortion etc. is asked
Topic.
The content of the invention
Present invention aim to address complicated, operating difficulties existing for existing holographic 3D zoom system, pancreatic systems and reproduction image
A kind of ropy technical problem, there is provided color hologram zoom system, pancreatic system based on liquid lens.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of color hologram zoom system, pancreatic system based on liquid lens, it includes collimating red light source, collimation green light source, standard
Straight blue-light source, Amici prism, spatial light modulator, computer, liquid lens, receiving screen and synchronization control circuit；The standard
Straight red light source, collimation green light source and collimated blue light source are located in the input path of Amici prism, the space light modulation
Device is located on the reflected light path of Amici prism, and the liquid lens is located at behind spatial light modulator, and the receiving screen is located at
Behind liquid lens；The signal output part of the spatial light modulator and the letter of computer enter output end connection, the synchronization
The signal input part of control circuit and the signal output part of liquid lens connect, the signal output part of synchronization control circuit and calculating
The signal input part connection of machine, control terminal and collimation red light source, collimation green light source and the collimated blue of synchronization control circuit
The control terminal connection of light source；Collimation red light source, collimation green light source and the collimated blue light source divide after Amici prism
It is not radiated in spatial light modulator, the light source controlled through spatial light modulator projects reception by the zoom of liquid lens
Screen；The synchronization control circuit ensures that light source, hologram are consistent with the switching time of liquid lens.
Further, the liquid lens is by clear hard cavity, upper substrate, infrabasal plate, Intermediate substrate, electrically conducting transparent liquid
Body, dielectric layer and ITO electrode layer composition, wherein, ITO electrode layer and dielectric layer are coated with Intermediate substrate successively；Electrically conducting transparent liquid
Immiscible transparent non-conductive liquid is filled around body；Intermediate substrate center is provided with a circular hole, is around uniformly distributed some
Passage of the individual aperture as electrically conducting transparent liquid communication, the infrabasal plate are located at the bottom of clear hard cavity, electrically conducting transparent liquid
Body is located above infrabasal plate, and the Intermediate substrate for being coated with ITO electrode layer and dielectric layer is located on electrically conducting transparent liquid, and upper substrate is set
In the top surface of clear hard cavity；During original state, two kinds of liquid of filling form a convex surface, now, light in liquid-liquid interface
Beam is after liquid lens, light beam convergence, the i.e. function of positive lens；When additional between ITO electrode layer and electrically conducting transparent liquid
After voltage, due to the left and right of electrowetting effect, conducting liquid can outwards be gushed out by the aperture of Intermediate substrate, now can be by center
Conducting liquid in circular hole detaches, so when liquid-liquid interface be concave surface, now, light beam is after liquid lens, beam divergence,
That is the function of negative lens.
Further, the long D of clear hard cavity1>=10mm and D1≤ 12mm, wide D2=D1, high D3>=8mm and D3≤
10mm；Intermediate substrate central circular hole diameter D4>=5mm and D4≤6mm；Periphery hole diameter D5>=1mm and D5≤ 2mm, thickness D6≥
2mm and D6≤3mm。
Further, the distance between light source and spatial light modulator are d1, between spatial light modulator and liquid lens
Distance be d2, the distance between receiving screen and liquid lens are d3, f1It is the digital lens being loaded into spatial light modulator
Focal length, f2It is the focal length of liquid lens；When the position of components of system keeps constant, by changing digital lens and liquid lens
Focal length, it is possible to achieve the scaling of reproduction image；The position of reproduction image meetsThe size of reproduction image isIn formula：λ is wavelength, and p is the pixel size of spatial light modulator；The magnitude relationship of three kinds of color reproduction pictures
For：In formula：Hr, Hg and Hb are three kinds of color reproduction pictures of red, green, blue
Size, f1r、f1gAnd f1bIt is the focal length for the digital lens being loaded into respectively on three kinds of color holograms, λr、λgAnd λbIt is respectively
The wavelength of respective color, in order to compensate the aberration caused by wavelength, Jiao for the digital lens being loaded on three kinds of color holograms
Away from needing to meet
The beneficial effects of the invention are as follows：The present invention coordinates the size of digital lens regulation reproduction image using liquid lens,
The Zoom effect of high quality is realized, solves complicated, operating difficulties and reproduction existing for existing holographic 3D zoom system, pancreatic systems
The ropy technical problem of picture.Compared with background technology, the present invention has simple in construction, easy to operate and reproduction image quality
The advantages that good.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the zoom schematic diagram of the present invention；
Fig. 3 is electrowetting driving liquid lens structure schematic diagram.
In figure：1- collimations red light source, 2- collimations green light source, 3- collimated blues light source, 4- Amici prisms, 5- spatial lights
Modulator, 6- computers, 7- liquid lens, 8- receiving screens, 9- synchronization control circuits, 10- clear hards cavity, 11- upper substrates,
12- infrabasal plates, 13- Intermediate substrates, 14- electrically conducting transparents liquid, 15- dielectric layers, 16-ITO electrode layers.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of color hologram zoom system, pancreatic system based on liquid lens in the present embodiment, it is red that it includes collimation
Color light source 1, collimation green light source 2, collimated blue light source 3, Amici prism 4, spatial light modulator (SLM) 5, computer 6, liquid
Lens 7, receiving screen 8 and synchronization control circuit 9；Collimation red light source 1, collimation green light source 2 and the collimated blue light source 3 are set
In the input path of Amici prism 4, the spatial light modulator 5 is located on the reflected light path of Amici prism 4, and the liquid is saturating
Mirror 7 is located at behind spatial light modulator 5, and the receiving screen 8 is located at behind liquid lens 7；The spatial light modulator 5
Signal output part enters output end with the letter of computer 6 and is connected, signal input part and the liquid lens 7 of the synchronization control circuit 9
Signal output part connection, the signal output part of synchronization control circuit 9 is connected with the signal input part of computer 6, Synchronization Control
The control terminal of circuit 9 is connected with the control terminal of collimation red light source 1, collimation green light source 2 and collimated blue light source 3；The standard
Straight red light source 1, collimation green light source 2 and collimated blue light source 3 are radiated at spatial light modulator respectively after Amici prism 4
On 5, the light source controlled through spatial light modulator 5 projects receiving screen 8 by the zoom of liquid lens 7；The Synchronization Control electricity
Road 9 ensures that light source, hologram are consistent with the switching time of liquid lens.
As shown in figure 3, the liquid lens 7 by clear hard cavity 10, upper substrate 11, infrabasal plate 12, Intermediate substrate 13,
Electrically conducting transparent liquid 14, dielectric layer 15 and ITO electrode layer 16 form, wherein, ITO electrode layer 16 is coated with Intermediate substrate 13 successively
With dielectric layer 15；The surrounding of electrically conducting transparent liquid 14 fills immiscible transparent non-conductive liquid；The center of Intermediate substrate 13 is provided with
One circular hole, is around uniformly distributed passage of several apertures as electrically conducting transparent liquid communication, and the infrabasal plate 12 is located at
The bottom of bright hard cavity 10, electrically conducting transparent liquid 14 are located above infrabasal plate 12, are coated with ITO electrode layer 16 and dielectric layer 15
Intermediate substrate 13 be located on electrically conducting transparent liquid 14, upper substrate 11 is located at the top surface of clear hard cavity 10；During original state,
Two kinds of liquid of filling form a convex surface in liquid-liquid interface, and now, light beam is after liquid lens, and light beam convergence is that is, just saturating
The function of mirror；After the applied voltage between ITO electrode layer 16 and electrically conducting transparent liquid 14, due to the left and right of electrowetting effect,
Conducting liquid can outwards be gushed out by the aperture of Intermediate substrate, can now detach the conducting liquid in central circular hole, so when
Liquid-liquid interface is concave surface, and now, light beam is after liquid lens, beam divergence, i.e. the function of negative lens.
Further, the 10 long D of clear hard cavity1>=10mm and D1≤ 12mm, wide D2=D1, high D3>=8mm and D3
≤10mm；The central circular hole diameter D of Intermediate substrate 134>=5mm and D4≤ 6mm, periphery hole diameter D5>=1mm and D5≤ 2mm is thick
Spend D6>=2mm and D6≤3mm。
Further, the distance between light source and spatial light modulator are d1, between spatial light modulator and liquid lens
Distance be d2, the distance between receiving screen and liquid lens are d3, f1It is the digital lens being loaded into spatial light modulator
Focal length, f2It is the focal length of liquid lens；When the position of components of system keeps constant, by changing digital lens and liquid lens
Focal length, it is possible to achieve the scaling of reproduction image；The position of reproduction image meetsThe size of reproduction image isIn formula：λ is wavelength, and p is the pixel size of spatial light modulator；The magnitude relationship of three kinds of color reproduction pictures
For：In formula：Hr, Hg and Hb are three kinds of color reproduction pictures of red, green, blue
Size, f1r、f1gAnd f1bIt is the focal length for the digital lens being loaded into respectively on three kinds of color holograms, λr、λgAnd λbIt is respectively
The wavelength of respective color, in order to compensate the aberration caused by wavelength, Jiao for the digital lens being loaded on three kinds of color holograms
Away from needing to meet
Fig. 2 is the zoom schematic diagram of the present invention.P is light source in figure, P1It is the position of SLM after images, d1Be light source and SLM it
Between distance, d2It is the distance between SLM and liquid lens, d3It is the distance between receiving screen and liquid lens.f1It is to be loaded into
The focal length of digital lens on SLM, f2It is the focal length of liquid lens.Record the hologram of object and digital lens respectively first
Hologram, secondly the hologram of digital lens is added with the hologram of object, generates the new hologram of a width, it is newly-generated
The phase of hologram meets below equation：
WhereinIt is the hologram of object, λ is wavelength, P1Behind SLM, P1Distance with SLM is f1.According to spreading out
Penetrate theory and understand P1The size for locating picture is h=f1λ/p.The position of reproduction image meets：
Therefore the size of reproduction image is：
In formula：P is SLM pixel size, from formula (3), when the position of components of system keeps constant, by changing
Become the focal length of digital lens and liquid lens, it is possible to achieve the scaling of reproduction image.The magnitude relationship of three kinds of color reproduction pictures is：
Wherein Hr, Hg and Hb is the size of three kinds of color reproduction pictures of red, green, blue, f1r、f1gAnd f1bIt is to be loaded into three respectively
The focal length of digital lens on kind color hologram, λr、λgAnd λbIt is the wavelength of respective color respectively.
In order to realize the effect of zoom, a width colour picture is subjected to red, green, blue color separation processing first, and generate respectively
The hologram of three width different colours scenes, its phase are designated as respectivelyWithFor the reproduction image of different wave length, its
Size is also different.In order to compensate the aberration caused by wavelength, the focal length for the digital lens being loaded on three kinds of color holograms needs
MeetThen generating three width according to formula (1) has the new of particular focal length
Hologram, its phase are designated as respectivelyWithFor the color reconstructed image of reproducing object, at the T1 moment, on SLM
Loading phase isRed hologram, and with collimation red light source irradiation SLM, red object can be now seen on receiving screen
Reproduction image；At the T2 moment, loading phase is on SLMGreen hologram, and with collimation green light source irradiation SLM, this
When green reproduction picture can be seen on receiving screen；Similarly, at the T3 moment, on SLM loading phase isBlue hologram, and
SLM is irradiated with collimated blue light source, blue reproduction image can be now seen on receiving screen；When sufficiently fast between upon handover, according to
The visual persistence effect of human eye, it can be seen that colored holographic reconstructed image., can by calculating when the focal length of digital lens changes
To obtain the focal length of liquid lens.Ensure that light source, hologram are consistent with the switching time of liquid lens using synchronization control circuit.
In order to realize the Zoom effect of high quality, the present invention coordinates digital lens regulation reproduction image using liquid lens 7
Size.Fig. 3 is electrowetting driving liquid lens structure schematic diagram.As shown in Fig. 3 (a), drawing for the diagrammaticalIy is four small
Passage of the hole as electrically conducting transparent liquid communication, the specific number of aperture need to design according to requirement of experiment；During original state, such as Fig. 3
(c) shown in, two kinds of liquid of filling form a convex surface in liquid-liquid interface, and now, after liquid lens 7, light beam converges light beam
Gather, i.e. the function of positive lens；After the applied voltage between ITO electrode layer and electrically conducting transparent liquid, due to electrowetting effect
Left and right, conducting liquid can outwards be gushed out by the aperture of Intermediate substrate, can now detached the conducting liquid in central circular hole, therefore
Now liquid-liquid interface is concave surface, and now, light beam is after liquid lens 7, beam divergence, i.e. the function of negative lens, such as Fig. 3 (b)
With 3 (d) Suo Shi.
One embodiment of the present of invention is that collimation red light source is the danger signal light that wavelength is 671nm, collimates green light
Source is the green light that wavelength is 532nm, and collimated blue light source is the blue signal light that wavelength is 473nm, between SLM pixel
Away from for 8 microns, resolution ratio is 1920 × 1080, and liquid lens and SLM distance are 15cm, liquid lens and receiving screen distance
For 30cm.Parameter is taken in formula (1)-(3), can be obtained：
Electrically conducting transparent liquid in liquid lens 7 is NaCl solution, is around filled with dimethicone, clear hard cavity
10 long D1=12mm, wide D2=d1, high D3=10mm.Intermediate substrate thickness D6=2mm, center thang-kng bore dia D4=6mm, periphery
The aperture of 4 same diameters is distributed as, diameter is D5=1mm.During original state, two kinds of liquid form one in liquid-liquid interface
Individual convex surface, it is+5.5D that measurement, which obtains its focal power,；After the applied voltage 60V DC between ITO electrode layer and NaCl solution, by
In the left and right of electrowetting effect, NaCl solution can outwards be gushed out by the aperture of Intermediate substrate, and now liquid-liquid interface is cut by convex surface
Concave surface is changed to, it is -3.2D that measurement, which obtains its focal power, and the embodiment illustrates that the liquid lens of design has zoom function.Pass through
The focal length of digital lens and liquid lens is adjusted, system can realize the function of zoom.
Claims (4)
- A kind of 1. color hologram zoom system, pancreatic system based on liquid lens, it is characterised in that：Including collimation red light source, collimation green Light source, collimated blue light source, Amici prism, spatial light modulator, computer, liquid lens, receiving screen and synchronization control circuit； Collimation red light source, collimation green light source and the collimated blue light source are located in the input path of Amici prism, the space Optical modulator is located on the reflected light path of Amici prism, and the liquid lens is located at behind spatial light modulator, the reception Screen is located at behind liquid lens；The signal output part of the spatial light modulator and the letter of computer enter output end connection, institute The signal output part of the signal input part and liquid lens of stating synchronization control circuit connects, the signal output part of synchronization control circuit It is connected with the signal input part of computer, control terminal and collimation red light source, collimation green light source and the standard of synchronization control circuit The control terminal connection of straight blue-light source；Collimation red light source, collimation green light source and the collimated blue light source are by light splitting rib It is radiated at respectively in spatial light modulator after mirror, the light source controlled through spatial light modulator is projected by the zoom of liquid lens Receiving screen；The synchronization control circuit ensures that light source, hologram are consistent with the switching time of liquid lens.
- A kind of 2. color hologram zoom system, pancreatic system based on liquid lens according to claim 1, it is characterised in that：The liquid Body lens are by clear hard cavity, upper substrate, infrabasal plate, Intermediate substrate, electrically conducting transparent liquid, dielectric layer and ITO electrode layer group Into, wherein, ITO electrode layer and dielectric layer are coated with Intermediate substrate successively；Electrically conducting transparent liquid perimeter is filled immiscible saturating Bright non-electrically conductive liquid；Intermediate substrate center is provided with a circular hole, is around uniformly distributed several apertures as electrically conducting transparent liquid The passage of circulation, the infrabasal plate are located at the bottom of clear hard cavity, and electrically conducting transparent liquid is located above infrabasal plate, is coated with The Intermediate substrate of ITO electrode layer and dielectric layer is located on electrically conducting transparent liquid, and upper substrate is located at the top surface of clear hard cavity；Just During beginning state, two kinds of liquid of filling form a convex surface in liquid-liquid interface, and now, after liquid lens, light beam converges light beam Gather, i.e. the function of positive lens；After the applied voltage between ITO electrode layer and electrically conducting transparent liquid, due to electrowetting effect Left and right, conducting liquid can outwards be gushed out by the aperture of Intermediate substrate, can now detached the conducting liquid in central circular hole, therefore Now liquid-liquid interface is concave surface, and now, light beam is after liquid lens, beam divergence, i.e. the function of negative lens.
- A kind of 3. color hologram zoom system, pancreatic system based on liquid lens according to claim 2, it is characterised in that：It is described Bright 10 long D of hard cavity1>=10mm and D1≤ 12mm, wide D2=D1, high D3>=8mm and D3≤10mm；The center of Intermediate substrate 13 circle Bore dia D4>=5mm and D4≤ 6mm, periphery hole diameter D5>=1mm and D5≤ 2mm, thickness D6>=2mm and D6≤3mm。
- A kind of 4. color hologram zoom system, pancreatic system based on liquid lens according to claim 1, it is characterised in that：Light source and sky Between the distance between optical modulator be d1, the distance between spatial light modulator and liquid lens are d2, receiving screen and liquid lens The distance between be d3, f1It is the focal length for the digital lens being loaded into spatial light modulator, f2It is the focal length of liquid lens；When being When the position of components of system keeps constant, by the focal length for changing digital lens and liquid lens, it is possible to achieve the scaling of reproduction image；Again Now as position meetThe size of reproduction image isIn formula：λ is wavelength, and p is spatial light The pixel size of modulator；The magnitude relationship of three kinds of color reproduction pictures is： In formula：Hr, Hg and Hb are the sizes of three kinds of color reproduction pictures of red, green, blue, f1r、f1gAnd f1bIt is that to be loaded into three kinds of colors respectively complete Cease the focal length of the digital lens on figure, λr、λgAnd λbIt is the wavelength of respective color respectively, in order to compensate the aberration caused by wavelength, The focal length for the digital lens being loaded on three kinds of color holograms needs to meet
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