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US 8,476,575 B2Granted
Method of forming an imaging device
AssigneeMicron Technology, Inc.
InventorAlexander Mokhnatyuk
Life of this patent
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Abstract
A method, apparatus, and system that provides a holographic layer as a micro-lens array and/or a color filter array in an imager. The method of writing the holographic layer results in overlapping areas in the hologram for corresponding adjacent pixels in the imager which increases collection of light at the pixels, thereby increasing quantum efficiency.
Claims23
A method of recording an optical holographic layer in an imaging device, comprising:
- projecting an object beam into an optical system;
- projecting a reference beam into the optical system;
- producing interference between the reference beam and the object beam to create interference beams of light;
- and
- projecting the interference beams onto the holographic layer to form holographic patterns to focus and color separate input radiation onto photosensors of pixels in a pixel array.
2 more elements
A method of forming an imaging device, said method comprising:
- providing a pixel array comprising a plurality of pixels formed in a substrate and a holographic material formed over the substrate;
- projecting object beams and reference beams into an optical system to create interference beams of light;
- and
- projecting the interference beams onto the holographic material to form holographic patterns corresponding to the pixels in the pixel array, wherein a respective holographic pattern is configured to focus and color separate input radiation onto a respective pixel of said pixel array.
1 more element
Dependencies are inferred from the claim text.