Invention Grant
- Patent Title: Spectroscopic sensor and angle limiting filter
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Application No.: US14855972Application Date: 2015-09-16
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Publication No.: US09709715B2Publication Date: 2017-07-18
- Inventor: Noriyuki Nakamura
- Applicant: SEIKO EPSON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SEIKO EPSON CORPORATION
- Current Assignee: SEIKO EPSON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2011-059232 20110317; JP2012-015047 20120127
- Main IPC: H01L29/78
- IPC: H01L29/78 ; G02B5/20 ; G01J3/02 ; G01J3/36 ; G01J3/28 ; H01L27/146 ; G01J3/12
Abstract:
An angle limiting filter includes: a first light-shielding layer containing a first light-shielding material and provided with a first opening; a second light-shielding layer containing a second light-shielding material and located in a region which surrounds at least one portion of the first light-shielding layer; a third light-shielding layer containing the first light-shielding material, provided with a second opening at least one portion of which overlaps the first opening, and located above the first light-shielding layer; and a fourth light-shielding layer containing the second light-shielding material and located above the second light-shielding layer in a region which surrounds at least one portion of the third light-shielding layer.
Public/Granted literature
- US20160003991A1 SPECTROSCOPIC SENSOR AND ANGLE LIMITING FILTER Public/Granted day:2016-01-07
Information query
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