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Patent Searching and Data


Title:
OBJECT DETECTION DEVICE, OBJECT DETECTION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/216349
Kind Code:
A1
Abstract:
Provided are a device and method for using polarization to detect a transparent object and calculate the residual stress of the transparent object. The present invention is provided with a light projection unit for outputting at least three different types of polarized light, a light reception unit for receiving light of at least three different observed polarization angles, and a data processing unit. The data processing unit stores light reception signals from the light reception unit in a state where there is no transparent object on the optical path in the storage unit as reference values and determines whether there is a transparent object on the optical path by comparing the reception signals for the plurality of different observed polarization angles of the light received by the reception unit with the reference values. Further, if a determination is made that there is a transparent object on the optical path, the reception signals for the plurality of different observed polarization angles of the light received by the reception unit are used to calculate the residual stress of the transparent object.

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Inventors:
ZHUANG TUO (JP)
HIRASAWA YASUTAKA (JP)
KONDO YUHI (JP)
Application Number:
JP2018/012519
Publication Date:
November 29, 2018
Filing Date:
March 27, 2018
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
G01V8/12; G01J1/02; G01J4/04; G01L1/00; G01N21/896
Foreign References:
JPH06148348A1994-05-27
JP2008157834A2008-07-10
JPH06111694A1994-04-22
JPH04329339A1992-11-18
Other References:
UMEZAKI, EISAKU ET AL.: "Stress distribution measurement techniques using photoelasticity: current status and future prospects", JOURNAL OF THE JAPAN SOCIETY FOR PRECISION ENGINEERING, vol. 79, no. 7, 5 January 2014 (2014-01-05), pages 607 - 611
Attorney, Agent or Firm:
MIYATA, Masaaki et al. (JP)
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