1987-11-19
1989-06-20
Arnold, Bruce Y.
350174, G02B 1310, G02B 2714
Patent
active
048404659
ABSTRACT:
Device for correcting the differential distortion resulting from simultaneous observation of a field of view at two distinct locations through a shield transparent in a given spectral band, which shield has a shape generating the distortion when a receiver which is sensitive in the spectral band is arranged at each of the locations. The correction is effected by an optical system arranged between the shield and one or the other receiver and comprising an anamorphic assembly (11, 12) producing an anamorphosis in a first direction associated with an element (13) introducing a curvature in a second direction, while the distortion produced by this system has a direction opposite to the differential distortion.
REFERENCES:
patent: 4245890 (1981-01-01), Hartman et al.
patent: 4580879 (1986-04-01), Wilson
Loy Fernand R.
Perrin Jean-Claude
Rollin Joel
Arnold Bruce Y.
Sugarman Scott J.
U.S. Philips Corporation
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