Stacks of optical structures and methods and apparatus for making same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Sep 12, 2002
app pub date -
Mar 5, 2001
filing date -
Mar 5, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Stacked optical structures and methods and apparatus for making them are provided. The stack has a uniform gap between adjacent structures in which (1) a mixture of adhesive and mechanical spacers and (2) an optical filler, or adhesive, is placed. Each stacked optical structure includes at least two optical substructures, each of which has a mating surface. The thickness of the gap is equal to the maximum diameter of the mechanical spacers. The mixture is distributed in the gap away from an optical axis and the optical filler is distributed in the gap such that the optical axis passes through it.
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