Optical: systems and elements – Extended spacing structure for optical elements – Extension of tubular element adjustable
Patent
1998-10-01
2000-12-12
Spyrou, Cassandra
Optical: systems and elements
Extended spacing structure for optical elements
Extension of tubular element adjustable
359494, 359896, 40701, 40710, A47G 106, G02B 530
Patent
active
061606634
ABSTRACT:
An assembly comprising a film bounded by a frame, the film having a first thermal expansion coefficient along a first direction parallel to the film and a second thermal expansion coefficient along a second direction parallel to the film, wherein thermal expansion of the film compared to that of the frame is greater along the first direction than along the second direction, and wherein the film has a shape at an ambient reference temperature different from that of the frame, the shape of the film being selected to reduce clearance while allowing sufficient room between the film and the frame for thermal expansion in the first direction for temperatures up to a predetermined elevated reference temperature.
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Harvey John C.
Langlois Reney R.
Merrill William W.
Mills Michael W.
Peebles Rosalind E.
3M Innovative Properties Company
Jr. John Juba
Pechman Robert J.
Spyrou Cassandra
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