PHOTOMETRIC DEVICE

WIPO Patent Application WO/2022/054469

A1

This photometric device (1) comprises a variable optical attenuator (4). The variable optical attenuator (4) comprises a plurality of optical attenuation filters and a drive device (5). Each of the plurality of optical attenuation filters comprises a multilayered interference film and a transparent substrate. Given two of the plurality of optical attenuation filters combined with each other are taken to be a first optical attenuation filter (optical attenuation filter (10)) and a second optical attenuation filter (optical attenuation filter (20)). A first optical path length of a first transparent substrate (transparent substrate (11)) of the first optical attenuation filter is different from a second optical path length of a second transparent substrate (transparent substrate (21)) of the second optical attenuation filter.

WO/2021/148771	DEVICE FOR STAND-OFF RAMAN SPECTROSCOPY
JP2003065852	IMAGE PROCESSING METHOD, DEVICE AND PROGRAM
JP4276080	Information-presenting substance-containing materials, their identification methods, identification systems, and identification devices

UMANODAN TSUGUMI (JP)
NAKATANI TORU (JP)
HIRAO YUSUKE (JP)

PCT/JP2021/028941

March 17, 2022

August 04, 2021

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KONICA MINOLTA INC (JP)

G01J3/02; G02B5/28; G02B26/02

WO2012014767A1	2012-02-02
WO2019039584A1	2019-02-28

JPH0989667A	1997-04-04
JP2009063377A	2009-03-26
US20050207014A1	2005-09-22
JPH09218092A	1997-08-19
US20070253063A1	2007-11-01

FUKAMI PATENT OFFICE, P.C. (JP)

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