Invention Grant
- Patent Title: Image sensor with sub-pixel photodiode array with multiple mini-wire grid polarizers for polarization imaging
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Application No.: US17501586Application Date: 2021-10-14
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Publication No.: US11644606B1Publication Date: 2023-05-09
- Inventor: Victor Lenchenkov
- Applicant: OmniVision Technologies, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: OmniVision Technologies, Inc.
- Current Assignee: OmniVision Technologies, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Cozen O'Connor
- Main IPC: G02B5/30
- IPC: G02B5/30 ; H04N5/232

Abstract:
An image sensor configured to resolve intensity and polarization has multiple pixels each having a single microlens adapted to focus light on a central photodiode surrounded by at least a first, a second, a third, and a fourth peripheral photodiodes, where a first polarizer at a first angle is disposed upon the first peripheral photodiode, a third polarizer at a third angle is disposed upon the third peripheral photodiode, a second polarizer at a second angle is disposed upon the second peripheral photodiode, and a fourth polarizer at a fourth angle is disposed upon the fourth peripheral photodiode, the first, second, third, and fourth angles being different. In embodiments, 4 or 8 peripheral photodiodes are provided, and in an embodiment the polarizers are parts of an octagonal polarizer.
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