Title:
撮影装置、及び、真正性の判定方法
Document Type and Number:
Japanese Patent JP7238883
Kind Code:
B2
Abstract:
Provided is a viewer for determining authenticity, comprising: a linear polarizer; and a retardation plate disposed on one side in the thickness direction of the linear polarizer, wherein at least one of the linear polarizer and the retardation plate is rotatably disposed and an angle between the absorption axis of the linear polarizer and the slow axis of the retardation plate is changeable within the range from +45°±5° to -45°±5°.
Inventors:
Yasuhide Fujino
Application Number:
JP2020506525A
Publication Date:
March 14, 2023
Filing Date:
March 11, 2019
Export Citation:
Assignee:
Zeon Corporation
International Classes:
G01N21/19; B42D25/364; G01N21/21; G02B5/30
Domestic Patent References:
| JP2011174978A | ||||
| JP2010525343A | ||||
| JP2007101280A | ||||
| JP2005260170A |
Foreign References:
| WO2012137550A1 | ||||
| US5475370 | ||||
| WO2014069515A1 |
Attorney, Agent or Firm:
Sakai International Patent Office