Wide angle scan camera

Details Wide angle scan camera Wide angle scan camera

1977-04-14

1979-06-05

Griffin, Donald A.

354 94, G03B 3900, G03B 3700

Patent

active

041572181

ABSTRACT:
A wide angle strip camera system which, in combination, includes a wide angle lens, having a curved conjugate focal surface, an image-receiving surface, a curved exposure slit disposed adjacent the image-receiving surface; the lens, image-receiving surface and exposure slit being so mounted that a semicircular strip at a constant preselected field angle in an object field is focused on the image-receiving surface. The system is fixedly supported in a vehicle, such as an aircraft, whereby the forward velocity of the vehicle provides image motion. The exposure slit is curved to correspond to field points of equal range so that there is negligible differential image motion within the slit, the slit being of such width in the direction of vehicle motion to result in uniform exposure; and the image-receiving surface is driven in the direction of vehicle movement at a speed corresponding to the altitude-velocity ratio of the vehicle with respect to the object field.
In a preferred form of the invention, the wide angle lens is a globe lens.

REFERENCES:
patent: 2969005 (1961-01-01), Blackstone
patent: 3653307 (1972-04-01), De Heere et al.
patent: 3821763 (1974-06-01), Scott
patent: 3934259 (1976-01-01), Krider
patent: 4033687 (1977-07-01), Hirayama et al.

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