Layered microlens structures and devices

Details Layered microlens structures and devices Layered microlens structures and devices

2007-04-03

2007-04-03

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S216000, C359S619000

Reexamination Certificate

active

11244101

ABSTRACT:
A microlens structure includes lower lens layers on a substrate. A sputtered layer of glass, such as silicon oxide, is applied over the lower lens layers at an angle away from normal to form upper lens layers that increase the effective focal length of the microlens structure. The upper lens layers can be deposited in an aspherical shape with radii of curvature longer than the lower lens layers. As a result, small microlenses can be provided with longer focal lengths. The microlenses are arranged in arrays for use in imaging devices.

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Tannas, Lawrence E., Jr., Display Technologies and Applications, Society for Information Display, Applications Seminars, May 16-18, 2000, Long Beach, California.

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