Tetraform microlenses and method of forming the same

A microlens array comprising:

• a plurality of lenses formed over a photosensitive pixel array, wherein each lens comprises:
• a sloped upper surface;
• a lower surface;
• a height from an apex of the sloped upper surface to the lower surface;
• and
• a horizontal distance, wherein the slope of the upper surface is defined by an angle formed by the tangent of the height to the horizontal distance.
• at least one microlens located on each lens, wherein each microlens is tilted at said angle.

An imager structure comprising:

• at least one pixel formed in a substrate;
• at least one lens formed over the at least one pixel, the at least one lens having an upper surface sloped with respect to the pixel;
• and
• at least one microlens associated with and supported by an associated lens, each microlens being positioned to pass incident light to an associated pixel through said associated lens and tilted by the upper surface of the associated lens.

An image processing system comprising:

• a processor;
• and
• an imager structure coupled to the processor, said imager structure comprising:
• a photosensitive pixel array;
• a plurality of lenses formed over the plurality of pixels, each lens being associated with a plurality of pixels and having an upper surface sloped with respect to the plurality of pixels;
• and
• a plurality of groups of microlenses, each group of microlenses being associated with and being respectively supported by an associated lens, each microlens supported by said associated lens being tilted by the upper surface of its associated lens.