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Liquid crystal box, manufacturing method, spatial light modulator and spatial light modulation system

A technology of spatial light modulator and manufacturing method, which is applied in the direction of optics, instruments, optical components, etc., can solve problems such as blurring, dark images, and reducing imaging quality, and achieve the effect of improving quality

Pending Publication Date: 2020-11-10
张家港奇点光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the display methods are all illuminated by spatially transmitted laser light, the zero-order diffraction (directly transmitted or reflected DC term) often occupies a large part of the energy and is mixed with the image to be displayed, making the displayed image change. Dim and fuzzy, seriously reducing image quality

Method used

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  • Liquid crystal box, manufacturing method, spatial light modulator and spatial light modulation system
  • Liquid crystal box, manufacturing method, spatial light modulator and spatial light modulation system
  • Liquid crystal box, manufacturing method, spatial light modulator and spatial light modulation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, a liquid crystal cell 1, the liquid crystal cell 1 includes a lower glass substrate 101 and an upper glass substrate 107, wherein the glass material of the upper glass substrate 107 has a refractive index of 1.756 at 633nm wavelength light, and has good light transmittance. The refractive index of the lower glass substrate 101 is 1.8;

[0039] The upper surface of the lower glass substrate 101 is plated with a silver film layer 102, the thickness of the silver film layer 102 is 100nm-120nm, preferably, the thickness of the silver film layer 102 is 100nm;

[0040] The lower surface of the upper glass substrate 107 is provided with an ITO transparent electrode layer 106, and the lower surface of the ITO transparent electrode layer 106 is provided with a liquid crystal alignment layer 105, and the alignment direction of the liquid crystal alignment layer 105 is aligned with the ITO transparent electrode layer 106. The direction of the electrode...

Embodiment 2

[0043] Such as figure 2 As shown, the embodiment of the present invention discloses a plasma spatial light modulator, the spatial light modulator includes an inverted isosceles trapezoidal reflective prism 2 and the liquid crystal cell 1, the upper side of the long side of the reflective prism 2 A refractive index matching layer is provided, and the lower glass substrate of the liquid crystal cell 1 is bonded above the refractive index matching layer. Wherein, reflective prism 2 is an isosceles trapezoid, and the prism is made of glass with a refractive index of 1.8. The two acute angles are 69.8 ± 1°. The incident light is vertically incident from the waist of the trapezoid, and the incident light and the normal constitute an incident angle of 69.8°. When the angle is greater than the critical angle of total reflection of the lower glass substrate 101, the incident light will enter the refractive index matching layer after passing through the reflective prism 2, and the refr...

Embodiment 3

[0046] Such as image 3 As shown, the present invention also discloses a spatial light modulation system. The spatial light modulation system includes: a laser 3, a spatial filter mirror group, a linear polarizer 7 and the above-mentioned spatial modulator. The spatial filter mirror group is arranged on The luminescence measurement of the laser 3, the linear polarizer 7 is arranged on the optical path downstream of the spatial filter mirror group, the laser 3 generates a laser incident light after passing through the linear polarizer 7 and one of the waists of the reflective prism 2 is vertical, and the The incident angle formed by the incident light and the normal line is greater than the critical angle of total reflection of the lower glass substrate 101 .

[0047] Wherein in this embodiment, the spatial filter mirror group includes a focusing mirror 4, an aperture plate 5 and a beam expander 6, and the focusing mirror 4, the aperture plate 5 and the beam expander 6 are sequ...

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Abstract

The invention discloses a liquid crystal box, which comprises a lower glass substrate and an upper glass substrate, the upper surface of the lower glass substrate is plated with a silver film layer, the lower surface of the upper glass substrate is provided with an ITO transparent electrode layer, the lower surface of the ITO transparent electrode layer is provided with a liquid crystal alignmentlayer, and the alignment direction of the liquid crystal alignment layer is perpendicular to the electrode stripe direction of the ITO transparent electrode layer; a support layer is fixed between thelower surface of the liquid crystal alignment layer and the upper surface of the silver film layer, a liquid crystal filling space is defined by the support layer, the liquid crystal alignment layerand the silver film layer together, the liquid crystal filling space is filled with a liquid crystal layer, and a signal generator is connected between the ITO transparent electrode layer and the silver film layer. The invention further discloses a manufacturing method of the liquid crystal box, a spatial light modulator using the liquid crystal box and a spatial light modulation system using theliquid crystal box, the spatial light modulation system adopts the combination of plasma resonance and a liquid crystal grating to filter zero-level diffracted light, and + / -1-level diffracted light is output.

Description

technical field [0001] The invention relates to a liquid crystal box, a manufacturing method of the liquid crystal box, and a spatial light modulator and a spatial light modulation system produced by using the liquid crystal box. Background technique [0002] Spatial light modulator (spatial light modulator, SLM) has also become the main way to replace the traditional holographic dry plate to realize the dynamic display of holographic patterns because of its advantages such as good optical modulation characteristics, low power consumption, fast response speed, and small size. However, since the display methods are all illuminated by spatially transmitted laser light, the zero-order diffraction (directly transmitted or reflected DC term) often occupies a large part of the energy and is mixed with the image to be displayed, making the displayed image change. It is dim and blurred, which seriously reduces the image quality. Contents of the invention [0003] The first techni...

Claims

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Application Information

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IPC IPC(8): G02F1/1333G02F1/1337G02F1/1339G02F1/1341G02F1/1343G02B27/46
CPCG02F1/1333G02F1/134309G02F1/1337G02F1/13392G02F1/13378G02F1/133788G02F1/1341G02B27/46
Inventor 庞超群尹韶云谭军
Owner 张家港奇点光电科技有限公司
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