Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kazunori Yamauchi0
Hiroyuki Sugiyama0
Date of Patent
December 16, 2008
0Patent Application Number
105471280
Date Filed
February 26, 2004
0Patent Primary Examiner
Patent abstract
In this spectral instrument, a plurality of interference filters 31, 32 . . . with transmitting wavebands different from each other are arranged in order so that light reflected by a specific interference filter 31 is made incident on the interference filter 32 on the next stage, and at positions on which light transmitted through each interference filter is made incident, photodetecting devices 41, 42 . . . are provided, wherein a silver thin film 31a with a thickness of 20 to 200 nm is provided on the light incidence surface side of the interference filter 31 on the first stage.
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