Phase gratings with odd symmetry for optical sensing

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United States of America Patent

PATENT NO 9470823
APP PUB NO 20160170103A1
SERIAL NO

15047499

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Abstract

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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.

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Patent Owner(s)

  • RAMBUS INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gill, Patrick R Sunnyvale, US 38 176
Stork, David G Portola Valley, US 80 3752

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