Polarization axis detector, polarization measurement device and method, and polarized light irradiation device

A technology for measuring devices and polarized light, which is applied in measuring devices, reflectometers for processing polarization, and measuring the polarization of light, and can solve the problems of low accuracy in measuring polarization axes
CN105300524AActive Publication Date: 2016-02-03USHIO DENKI KK
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
USHIO DENKI KK
Publication Date
2016-02-03

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Abstract

The present invention provides a polarization axis detector, a polarization measurement device and method, and a polarized light irradiation device. The light from a light source changes with the illuminance of time, the polarization axis of the polarized light may be measured with a high precision. The polarization axis detector comprises a first polarized light detection part (311) having a rotary detection polarizer (311a) configured to detect the polarization axis and a first illuminance sensor (311b) configured to detect the illuminance information of the polarized light from the light source through the detection polarizer (311a); and a second polarized light detection part (312) arranged in parallel with the first polarized light detection part (311) and having a second illuminance sensor (312a) configured to directly detection the illuminance information of the polarized light from the light source. The polarization measurement device is configured to calculate the polarization property of the polarized light from the light source according to the illuminance information detected by the first polarized light detection part (311) and the illuminance information detected by the second polarized light detection part (312).
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Description

Technical field

[0001] The present invention relates to a polarization axis detector for measuring the polarization axis of polarized light, a polarization measurement device, a polarization measurement method, and a polarization irradiation device. Background technique

[0002] In recent years, with regard to the alignment treatment of the alignment film of the liquid crystal display element represented by the liquid crystal panel or the alignment layer of the viewing angle compensation film, a technique called photo-alignment in which a predetermined wavelength of polarized light is irradiated for alignment has been adopted.

[0003] The irradiating device used in the light orientation usually includes a light source and a polarizer, passes the light from the light source through the polarizer, and irradiates the polarized light obtained therefrom. In the photo-alignment technology, it is very important whether the polarization axis of the polarized light irradiated from the irra...

Claims

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