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High light-sensing efficiency image sensor apparatus and method

  • US 20020135825A1
  • Filed: 07/13/2001
  • Published: 09/26/2002
  • Est. Priority Date: 07/14/2000
  • Status: Abandoned Application
First Claim
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1. An image sensor apparatus for converting an incident light into electric signal, said apparatus comprising:

  • a color separation layer comprising a body layer for receiving said incident light, a surface of said body layer being covered by a two-dimensional microlens array of a plurality of lenslets, and the other surface of said body layer being covered by a blazed diffraction grating layer;

    a zeroth-order reflection layer disposed behind said color separation layer along the path of said incident light for reflecting away zeroth-order component of said incident light; and

    an image sensor array disposed behind said zeroth-order reflection layer along the path of said incident light and comprising a plurality of light-sensing cells arranged in a two-dimensional array;

    each of said light-sensing cells being disposed at a position aligned with a corresponding one of said lenslets in said microlens array and comprising a red, a green and a blue photoelectric sensor for respectively converting energy of photons of said incident light in the red, green and blue color bands into electric signals proportionally representing the energy level of photons in the corresponding color bands.

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