CN101697042A - Liquid crystal optical device based on digital microscope component - Google Patents
Liquid crystal optical device based on digital microscope component Download PDFInfo
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- CN101697042A CN101697042A CN200910193306A CN200910193306A CN101697042A CN 101697042 A CN101697042 A CN 101697042A CN 200910193306 A CN200910193306 A CN 200910193306A CN 200910193306 A CN200910193306 A CN 200910193306A CN 101697042 A CN101697042 A CN 101697042A
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- liquid crystal
- digital micromirror
- light
- micromirror device
- optical device
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Abstract
The invention discloses a liquid crystal optical device based on a digital microscope component, which comprises a light source system, a digital microscope component, a computer control system, an imaging system, a liquid crystal layer and a liquid crystal control system, wherein the light source system is used for forming parallel light, the digital microscope component receives the parallel light and generates a plurality of beams of diffracted light, the computer control system is used for controlling the digital microscope component, the imaging system converges the diffracted light and coheres and superposes the diffracted light to form modulation figures, the liquid crystal layer receives the modulation figures, and the liquid crystal control system is used for applying driving voltage to the liquid crystal layer. The invention can modulate the liquid crystal layer accurately and quickly.
Description
Technical field
The present invention relates to a kind of liquid crystal optical device based on Digital Micromirror Device.
Background technology
The light modulating properties of liquid crystal is a kind of novel study on regulation that is different from electrooptical modulation, and it can make photoswitch, light storage device, holographic memory device etc.Regulate and control the research of performance for the light of liquid crystal, the high light of certain pattern need be acted on the liquid crystal, optical property (mainly being index modulation) with liquid crystal under the effect of research high light, usually the pattern that adopts is the candy strip of the simplest two-beam interference, the loading of other patterns has difficulties, so seldom be used.
Summary of the invention
At the shortcoming of prior art, the purpose of this invention is to provide the high liquid crystal optical device of a kind of modulation accuracy based on Digital Micromirror Device.
For achieving the above object, technical scheme of the present invention is: a kind of liquid crystal optical device based on Digital Micromirror Device, it comprises the light-source system that is used to form directional light, receive directional light and produce the multi beam diffraction light Digital Micromirror Device, be used for the control figure micro mirror element computer control system, can make its coherence stack form the imaging system of modulation pattern, the liquid crystal control system that receives the liquid crystal layer of modulation pattern and be used for applying driving voltage by coalescence the multi beam diffraction light to liquid crystal layer.
This imaging system comprises convex lens and aspheric mirror, and the multi beam diffraction light forms dot matrix through convex lens focus on back focal plane, through aspheric mirror complex imaging on the picture plane, forms modulation pattern again.
The focal length of convex lens is big than the focal length of aspheric mirror, and the aspheric mirror numerical aperture is bigger than convex lens numerical aperture.
These convex lens are low-pass filter.
The default figure of this computer control system is input to the static RAM of being located on the Digital Micromirror Device through the I/O interface with the binary digit form, is used to control the upset of being located at eyeglass on the Digital Micromirror Device, realizes predetermined diffraction light output.
This light-source system comprises object lens, little pin hole and achromat, and semiconductor laser becomes above-mentioned directional light through behind object lens, little pin hole and the achromat successively.
This device also comprises the exploring laser light source of the directive liquid crystal layer plane of incidence and is used to survey the diffraction detection system of liquid crystal layer exit facet shoot laser diffraction pattern, this diffraction detection system according to diffraction pattern as a result feedback signal return liquid crystal control system or computer control system.
This exploring laser light source is the He-Ne Lasers source.
Compared with prior art, the present invention has following advantage:
Adopt resolution and the little pixel to 14um of Digital Micromirror Device itself, further dwindle again and regulate and control, can obtain the little arbitrary graphic pattern to 4um of space 1024*768 resolution pixel up to 1024*768.Liquid crystal is loaded the high light pattern will not be limited in interference fringe, and be any Adjustable real-time.
The present invention is based on Digital Micromirror Device control liquid crystal display, Digital Micromirror Device can show in real time, easily presets identical pattern with computer control system, finally dwindle into picture and form modulation pattern through imaging system, can be accurately, apace liquid crystal layer is modulated.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
As shown in Figure 1, a kind of liquid crystal optical device based on Digital Micromirror Device, it comprises the light-source system that is used to form directional light, receive directional light and produce the multi beam diffraction light Digital Micromirror Device, be used for the control figure micro mirror element computer control system, can make its coherence stack form the imaging system of modulation pattern, the liquid crystal control system that receives the liquid crystal layer of modulation pattern and be used for applying driving voltage by coalescence the multi beam diffraction light to liquid crystal layer.
This light-source system sends directional light, directional light is handled the back through Digital Micromirror Device and is formed the multi beam diffraction light, the multi beam diffraction light can the coalescence coherence stack form modulation pattern by imaging system, modulation pattern acts on the liquid crystal layer, and liquid crystal layer is applied driving voltage by the liquid crystal control system, realize the modulation of liquid crystal, thereby realize that liquid crystal image shows.
This imaging system comprises convex lens L1 and aspheric mirror L2, and the multi beam diffraction light focuses on through convex lens L1 and forms dot matrix on the back focal plane, through aspheric mirror L2 complex imaging on the picture plane, forms modulation pattern again.
The focal length of convex lens L1 is big than the focal length of aspheric mirror L2, and aspheric mirror L2 numerical aperture is bigger than convex lens L1 numerical aperture.These convex lens L1 is a low-pass filter.
The default figure of this computer control system is input to the static RAM of being located on the Digital Micromirror Device through the I/O interface with the binary digit form, is used to control the upset of being located at eyeglass on the Digital Micromirror Device, realizes predetermined diffraction light output.Digital Micromirror Device can be in real time, show easily and presets identical pattern with computer control system, finally dwindles into through imaging system to look like the formation modulation pattern, can be accurately, apace liquid crystal layer is modulated.
This light-source system comprises object lens, little pin hole and achromat, and semiconductor laser becomes above-mentioned directional light through behind object lens, little pin hole and the achromat successively.
In order to detect the accuracy that the liquid crystal layer image shows, this device also comprises the exploring laser light source of the directive liquid crystal layer plane of incidence and is used to survey the diffraction detection system of liquid crystal layer exit facet shoot laser diffraction pattern, this diffraction detection system according to diffraction pattern as a result feedback signal return liquid crystal control system or computer control system.If find that diffraction pattern does not meet predetermined result, this diffraction detection system feedback signal is to liquid crystal control system or computer control system, and computing machine can calculate and regenerate new pattern voluntarily, and perhaps the liquid crystal control system is modulated liquid crystal layer.
In the present embodiment, this exploring laser light source is the He-Ne Lasers source.
Claims (8)
1. liquid crystal optical device based on Digital Micromirror Device, it is characterized in that, comprise the light-source system that is used to form directional light, receive directional light and produce the multi beam diffraction light Digital Micromirror Device, be used for the control figure micro mirror element computer control system, with the multi beam diffraction light can coalescence make its coherence stack form modulation pattern imaging system, receive the liquid crystal layer of modulation pattern and be used for applying the liquid crystal control system of driving voltage to liquid crystal layer.
2. the liquid crystal optical device based on Digital Micromirror Device according to claim 1, it is characterized in that, this imaging system comprises convex lens (L1) and aspheric mirror (L2), the multi beam diffraction light focuses on through convex lens (L1) and forms dot matrix on the back focal plane, pass through aspheric mirror (L2) complex imaging on the picture plane again, form modulation pattern.
3. the liquid crystal optical device based on Digital Micromirror Device according to claim 2 is characterized in that, the focal length of convex lens (L1) is big than the focal length of aspheric mirror (L2), and aspheric mirror (L2) numerical aperture is bigger than convex lens (L1) numerical aperture.
4. the liquid crystal optical device based on Digital Micromirror Device according to claim 2 is characterized in that, these convex lens (L1) are low-pass filter.
5. the liquid crystal optical device based on Digital Micromirror Device according to claim 1, it is characterized in that, the default figure of this computer control system is input to the static RAM of being located on the Digital Micromirror Device through the I/O interface with the binary digit form, be used to control the upset of being located at eyeglass on the Digital Micromirror Device, realize predetermined diffraction light output.
6. the liquid crystal optical device based on Digital Micromirror Device according to claim 1, it is characterized in that, this light-source system comprises object lens, little pin hole and achromat, and semiconductor laser becomes above-mentioned directional light through behind object lens, little pin hole and the achromat successively.
7. according to each described liquid crystal optical device of claim 1 to 6 based on Digital Micromirror Device, it is characterized in that, this device also comprises the exploring laser light source of the directive liquid crystal layer plane of incidence and is used to survey the diffraction detection system of the diffraction pattern of liquid crystal layer exit facet outgoing, this diffraction detection system according to diffraction pattern as a result feedback signal return liquid crystal control system or computer control system.
8. the liquid crystal optical device based on Digital Micromirror Device according to claim 7 is characterized in that, this exploring laser light source is the He-Ne Lasers source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101933062A CN101697042B (en) | 2009-10-26 | 2009-10-26 | Liquid crystal optical device based on digital microscope component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101933062A CN101697042B (en) | 2009-10-26 | 2009-10-26 | Liquid crystal optical device based on digital microscope component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101697042A true CN101697042A (en) | 2010-04-21 |
| CN101697042B CN101697042B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101933062A Expired - Fee Related CN101697042B (en) | 2009-10-26 | 2009-10-26 | Liquid crystal optical device based on digital microscope component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768472A (en) * | 2012-06-30 | 2012-11-07 | 南京大学 | Method and device for realizing liquid crystal arbitrary orientation control through numerical control micromirror array photoetching |
-
2009
- 2009-10-26 CN CN2009101933062A patent/CN101697042B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768472A (en) * | 2012-06-30 | 2012-11-07 | 南京大学 | Method and device for realizing liquid crystal arbitrary orientation control through numerical control micromirror array photoetching |
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| CN101697042B (en) | 2011-06-22 |
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