Optical: systems and elements – Lens – Including a nonspherical surface
Patent
1997-10-06
1999-06-22
Sugarman, Scott J.
Optical: systems and elements
Lens
Including a nonspherical surface
G02B 308
Patent
active
059148217
ABSTRACT:
A window is made of a curved piece of a transparent material having a front surface and a back surface. At least one of the front surface and the back surface has a shape which is a segment of a convex aspheric shape rotated about a center, otherwise known as a torus.
REFERENCES:
patent: 4312573 (1982-01-01), Sternberg
patent: 5191324 (1993-03-01), Rydel
patent: 5526181 (1996-06-01), Kunick et al.
Chen Chungte W.
Fry Stephen C.
Hart Darcy J.
Alkov Leonard A.
Lenzen, Jr. Glenn H.
Raufer Colin M.
Raytheon Company
Sugarman Scott J.
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