Optical: systems and elements – Lens – With light limiting or controlling means
Reexamination Certificate
2006-09-05
2006-09-05
Schwartz, Jordan M. (Department: 2873)
Optical: systems and elements
Lens
With light limiting or controlling means
C250S232000, C378S160000
Reexamination Certificate
active
07102832
ABSTRACT:
A chopper for an imaging system includes a frame and a sheet that have different coefficients of thermal expansion. The frame has a space within it, and has at least one opening that allows radiation to pass through the space. The sheet has structure which influences radiation passing through the sheet, and the sheet is movably disposed within the space in the frame, in a manner so that the sheet can expand and contract relative to the frame in a direction approximately parallel to the sheet. The frame prevents any significant movement of the sheet in a direction transverse to the sheet.
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Felts Paul D.
Kormos Alexander L.
L-3 Communications Corporation
O'Keefe Egan & Peterman, LLP
Schwartz Jordan M.
Stultz Jessica
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