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US 6,150,653 AGranted
Lens system for photodetectors
AssigneeIntel Corporation
InventorsAzar Assadi, Kannan Raj, Robert C. Sundahl
Life of this patent
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Abstract
An photosensitive device may be formed with a diffractive lens which offsets chromatic aberrations and dispersion caused by a refractive capture lens. The diffractive lens may be formed of a sol-gel material having a photoinitiator, or other materials including those that may be defined with low temperature techniques commonly used in connection with photoresist.
Claims1
A photodetector comprising:
- a packaged photosensitive device;
- a diffractive lens arranged on said packaged photosensitive device, said lens formed of a sol-gel material including a photoinitiator, said lens having a stepped configuration including a plurality of surfaces stacked one upon the other;
- and
- a window formed over said packaged photosensitive device, said lens being formed over said window.
1 more element
Dependencies are inferred from the claim text.