Title:
POLARIZATION EVALUATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/171058
Kind Code:
A1
Abstract:
In order to provide a polarization evaluation device in which polarization evaluation is performed except on the polarization characteristics of an optical system, the present invention provides a polarization evaluation device which comprises: an optical system including an illumination unit that irradiates an object to be observed with illumination light for observation, and an imaging unit that acquires polarization images in a plurality of specific directions from reflection light that is reflected illumination light reflected by the object to be observed; and an image processing unit that outputs an evaluation result for the polarization characteristics of the object to be evaluated that is evaluated from polarization images in the plurality of specific directions acquired by the imaging unit. The image processing unit includes: a correction coefficient calculation unit which creates correction coefficients for removing a polarization noise based on the polarization characteristics of the optical system other than the object to be observed; a correction coefficient storage unit which stores the correction coefficients; and a polarization characteristic evaluation unit which creates, on the basis of the correction coefficients, corrected polarization images that are obtained by removing the polarization noise from the polarization images in the plurality of specific directions, and which outputs an evaluation result for the polarization characteristics of the object to be evaluated that is evaluated from the corrected polarization images.
Inventors:
KUMAGAI YUKIHISA (JP)
SUGIHARA HIROKI (JP)
TAKEMOTO KYOYA (JP)
SUGIHARA HIROKI (JP)
TAKEMOTO KYOYA (JP)
Application Number:
PCT/JP2022/044844
Publication Date:
September 14, 2023
Filing Date:
December 06, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
G01J4/04; G01N21/21
Domestic Patent References:
| WO2019198287A1 | 2019-10-17 |
Foreign References:
| JP2015537211A | 2015-12-24 | |||
| JP2005337785A | 2005-12-08 | |||
| CN112417370A | 2021-02-26 |
Other References:
LANE CONNOR, RODE DAVID, RÖSGEN THOMAS: "Calibration of a polarization image sensor and investigation of influencing factors", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA, US, vol. 61, no. 6, 20 February 2022 (2022-02-20), US , pages C37 - C45, XP093090820, ISSN: 1559-128X, DOI: 10.1364/AO.437391
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