Invention Grant
- Patent Title: Phase gratings with odd symmetry for optical sensing
- Patent Title (中): 用于光学感测的具有奇对称性的相位光栅
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Application No.: US15047499Application Date: 2016-02-18
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Publication No.: US09470823B2Publication Date: 2016-10-18
- Inventor: Patrick R. Gill , David G. Stork
- Applicant: Rambus Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Silicon Edge Law Group LLP
- Agent Arthur J. Behiel
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G02B27/00 ; H04N5/225 ; H04N5/232

Abstract:
A sensing device with an odd-symmetry grating projects near-field spatial modulations onto a closely spaced photodetector array. Due to physical properties of the grating, the spatial modulations are in focus for a range of wavelengths and spacings. The spatial modulations are captured by the array, and photographs and other image information can be extracted from the resultant data. Used in conjunction with a converging optical element, versions of these gratings provide depth information about objects in an imaged scene. This depth information can be computationally extracted to obtain a depth map of the scene.
Public/Granted literature
- US20160170103A1 Phase Gratings with Odd Symmetry for Optical Sensing Public/Granted day:2016-06-16
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