Spatial light modulator

An optical device and device technology, applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problem of undisclosed optical device implementation methods, and achieve the effect of realizing phase modulation and improving response speed.

Inactive Publication Date: 2019-03-22
JIANGSU INTELIGHT ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although this patent document can provide a solution for applying birefringent materials to optical devices, it does not disclose the specific implementation of optical devices

Method used

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Experimental program
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Embodiment 1

[0059] In one embodiment, the lower substrate uses a liquid crystal on silicon wafer with a resolution of 1920×1080, and both the intermediate dielectric layer and the upper substrate use ITO glass. The liquid crystal is selected as the upper liquid crystal is packaged in TN mode, and the lower layer is packaged in ECB mode. A possible alignment selection is that both the surface of the lower substrate and the surface of the intermediate dielectric layer are aligned at 45° to one side of the device, and the surface of the upper substrate is aligned parallel or perpendicular to one side of the device. The distance between the upper substrate and the ITO glass is 1um (that is, the thickness of the upper liquid crystal layer is 1um), and the distance between the ITO glass and the lower substrate is 2.5um (that is, the thickness of the lower liquid crystal layer is 2.5um).

[0060] The light source (pixel) uses an OLED display panel, and a polarizing prism is added to the light pa...

Embodiment 2

[0068] In Embodiment 2, both the upper substrate and the lower substrate are made of transparent materials, and both the upper substrate and the lower substrate are TFT substrates with pixel point voltage modulation capabilities. The alignment direction of the substrate is consistent with the surface of the corresponding dielectric layer, and it is consistent with the alignment direction of the upper substrate or one of the surfaces of the dielectric layer corresponding to the upper substrate. The polarization direction of the light emitted by the light source is changed after passing through the upper substrate. The amount is determined by the input signal of each pixel. The same as the above example, the polarization direction of all pixels can be equivalently decomposed into a combination of the direction consistent with the alignment direction of the underlying substrate and the direction perpendicular to the alignment direction of the underlying substrate, because the long...

Embodiment 3

[0070] Another application is to reduce the required thickness of a single-layer material by laminating multiple layers of birefringent materials (thickness and response time are generally in a quadratic relationship, the smaller the thickness, the faster the response speed of the material), so as to achieve the same phase and / or within the range of intensity modulation, improving the response time of the device itself. For example, in Embodiment 3, the optical device includes a multilayer structure (comprising three layers of birefringent materials), the lower substrate uses a silicon-based liquid crystal wafer, and a conductive medium layer is 1.8um away from the wafer, and the two surfaces of the conductive medium layer The alignment direction of the substrate is the same as that of the lower substrate, and the liquid crystal material is filled between the two layers. The conductive medium layer is at least 1.8um and is a transparent intermediate substrate, on which electr...

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Abstract

The invention provides an optical device and an optical system. The device comprises a one-layer structure or a multi-layer structure; the structure comprises an upper substrate, at least one intermediate medium layer and a lower substrate which are arranged in sequence; the part between the upper substrate and the intermediate medium layer and the part between the intermediate medium layer and the lower substrate are filled with birefringent materials. The optical device and the optical system can achieve the modulation of phases while the change of the polarization direction of the incidentlight is achieved, and the modulation of the intensity and phases of the incident light can be simultaneously achieved in some application cases. According to the invention, the response speed of a spatial light modulator to a modulated signal can be improved.

Description

technical field [0001] The present invention relates to the field of optical devices, in particular to optical devices and optical systems. Background technique [0002] Patent document CN101323981A discloses a borate-based birefringent optical crystal and its application. These crystals are all negative uniaxial crystals, and the birefringence value in the visible light band is about 0.08-0.15. This series of crystals are easy to cut, grind, polish and store, insoluble in water, non-deliquescent, stable in air, suitable for making optical communication components, such as optical isolators, circulators, beam shifters, optical polarizers and Optical modulators, etc. In particular, it is used to make polarizing prisms, phase delay devices and electro-optic modulation devices for various purposes. These devices take advantage of the refractive index properties of crystals, specifically their large birefringence. [0003] Although this patent document may provide a solution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333
CPCG02F1/1333
Inventor 谈顺毅
Owner JIANGSU INTELIGHT ELECTRONICS TECH
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