Optical apparatus for varying focal power along one principal me

Details Optical apparatus for varying focal power along one principal me Optical apparatus for varying focal power along one principal me

1976-08-02

1980-05-20

Corbin, John K.

350187, G02B 1500, G02B 1308

Patent

active

042036518

ABSTRACT:
An apparatus, including a pair of spaced-cylinder lenses having their cylinder axes in one plane with a third cylinder lens slideably mounted on a carriage therebetween and having its cylinder axis positioned normal to the plane, permits the focal power in one principal meridian to be continuously varied by moving the carriage with the third cylinder lens. The lenses are supported by a rotatable assembly and the slideable carriage is supported by a track running parallel to the optical axis.

REFERENCES:
patent: 2782683 (1957-02-01), Walker
patent: 3051051 (1962-08-01), Jeffree
patent: 3317735 (1967-05-01), Elsasser
patent: 3485554 (1969-12-01), Hemstreet
patent: 3664631 (1972-05-01), Guyton

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