Equiphase retardation sheet and application thereof

A retarder and equal-phase technology, applied in optics, instruments, optical components, etc., can solve problems such as difficult preparation and application, and achieve the effect of eliminating dispersion and improving contrast

Inactive Publication Date: 2015-05-27
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the beam splitter crystal in the above-mentioned optical phase retarder is tens to hundreds of microns, and has certain requirements on the incident angle, so it is difficult to prepare and apply in practical applications

Method used

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  • Equiphase retardation sheet and application thereof
  • Equiphase retardation sheet and application thereof
  • Equiphase retardation sheet and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take four pieces of glass, and perform orientation treatment on them: the pre-tilt angle is 2°, and two anti-parallel liquid crystal cells with cell thicknesses of 10um and 20um are fabricated.

[0036] The nematic liquid crystal used in the equal-phase wave plate is produced by Jiangsu Hecheng Display Technology Co., Ltd. The models are: HAG613089 and HAG623073, and the Δn is 0.098 and 0.067 respectively (measured when the refractive index is λ=589nm).

[0037] Use capillary action to pour HAG613089 liquid crystal into a 10um antiparallel liquid crystal cell, and pour HAG623073 into a 20um antiparallel liquid crystal cell. Lay two liquid crystal cells so that the alignment directions of their liquid crystal molecules are perpendicular to each other to form an equal-phase λ / 2 retarder.

[0038] Place the prepared equal-phase wave plate between two parallel polarizers, make the direction of the absorption axis of the polarizer and the molecular arrangement direction (e-a...

Embodiment 2

[0041] Take 4 pieces of glass and do orientation treatment: the pre-tilt angle is 2°, and two antiparallel liquid crystal cells are made, one of which is 5um in thickness and the other is 10um in thickness.

[0042]The nematic liquid crystal used in the equal-phase wave plate is produced by Jiangsu Hecheng Display Technology Co., Ltd. The models are: HAG613089 and HAG623073, and the Δn is 0.098 and 0.067 respectively (measured when the refractive index is λ=589nm).

[0043] Use capillary action to pour liquid crystal HAG613089 into a 5um antiparallel liquid crystal cell, and pour HAG623073 into a 10um antiparallel liquid crystal cell. The two liquid crystal cells are pasted together so that their liquid crystal molecules pointing directions are perpendicular to each other to form an isophase λ / 4 wave plate.

[0044] Since the direct verification of the 1 / 4 wave plate is more complicated, two 1 / 4 wave plates are superimposed into a 1 / 2 wave plate for verification, as follows. ...

Embodiment 3

[0048] Take three pieces of glass and do orientation treatment with a pre-tilt angle of 2° to make an anti-parallel friction box with a thickness of 10.5um, and keep the other piece of glass that has undergone orientation treatment.

[0049] The nematic liquid crystals and polymerizable liquid crystals used in the phase retarder are produced by Jiangsu Hecheng Display Technology Co., Ltd. The models are: HAG613089 and POLY623073-005, of which POLY623073-005 is polymer liquid crystal, which is used in polymer liquid crystal The photoinitiator is produced by Jiangsu Hecheng Display Technology Co., Ltd., and its model is: IE-184.

[0050] HAG613089 is poured into a 10.5um liquid crystal cell by capillary action, and the Δn of the liquid crystal is 0.092 (measured when the refractive index is λ=589nm).

[0051] Spin-coat the retained glass with POLY623073-005, the center of rotation is the center of mass of the glass, and the rotation speed is 3000r / s. Place the spin-coated glass...

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Abstract

The invention provides an equiphase retardation sheet which comprises a birefraction material layer A and a birefraction material layer B that are stacked. For two light with wavelengths of lambda 1 and lambda 2, the thickness dA of the birefraction material layer A and the thickness dB of the birefraction material layer B meet the following formula as shown in the specification. Phase retardation of the light is adjusted by keeping a ratio of the thicknesses of the two material layers unchanged and changing the thicknesses and birefringences of the two birefraction material layers, to further achieve the equal phase retardation of the light with the two wavelengths after the light passes through the equiphase retardation sheet. The equiphase retardation sheet is applied in equipment such as a display and an optical communication device and can achieve effects of eliminating color dispersion and improving a contrast.

Description

technical field [0001] The invention relates to an equal-phase retarder capable of eliminating chromatic aberration and improving contrast, and belongs to the technical field of optical devices. In addition, the present invention also relates to the application of the equal-phase retarder in devices such as displays and optical communication devices. Background technique [0002] The optical phase retarder can generate an additional phase difference between the two perpendicular polarization components of the beam (or make the phases of the two components relatively shifted), which is a kind of basic polarizing device. Phase retarders are generally used on liquid crystal displays to improve the display quality of images. However, general phase retarders are not sufficient for the intended use in practical use. This is because the performance of the birefringent material used to make the phase retarder is closely related to the wavelength, and the phase retardation of the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/3083
Inventor 钱皓董昆
Owner JIANGSU HECHENG DISPLAY TECHCO
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