Invention Application
- Patent Title: OPTICAL FILTERS COMPLEMENTARY ANGULAR BLOCKING REGIONS
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Application No.: US17746170Application Date: 2022-05-17
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Publication No.: US20220276421A1Publication Date: 2022-09-01
- Inventor: John A. Wheatley , Guanglei Du , Gilles J. Benoit , Rolf W. Biernath
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- Main IPC: G02B5/28
- IPC: G02B5/28 ; G02B5/00 ; G02B5/04 ; G02B5/20

Abstract:
An example optical filter may include an angle blocking layer having a first angular light blocking range θAL relative to a normal axis, and an interference filter adjacent the angle blocking layer having a second angular light blocking range θIF relative to the normal axis. θIF and θAL at least partially overlap. The example optical filter has a predetermined light transmission zone comprising angles from 0° to a maximum light transmission angle θTmax relative to a normal axis of the major surface. The example optical filter has a predetermined angular light blocking zone θB, a union of θIF and θAL. An example optical filter may include an interference filter having an incidence angle-dependent reflection band and an absorbing layer having an absorption band. The incidence angle-dependent reflection band and the absorption band may overlap at at least one wavelength at at least one angle of incidence.
Public/Granted literature
- US11899230B2 Optical filters complementary angular blocking regions Public/Granted day:2024-02-13
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