Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jin Li0
Jiutao Li0
Loriston Ford0
Ulrich Boettiger0
Date of Patent
April 3, 2007
0Patent Application Number
112441010
Date Filed
October 6, 2005
0Patent Primary Examiner
Patent 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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