Optical apparatus for varying focal power along one...

Details Optical apparatus for varying focal power along one... Optical apparatus for varying focal power along one...

G - Physics

02

B

88/109, 88/110,

G02B 7/04 (2006.01) G01M 11/02 (2006.01)

Patent

CA 1096674

AN OPTICAL APPARATUS FOR VARYING FOCAL POWER ALONG ONE PRINCIPAL MERIDIAN WHILE MAINTAINING CONSTANT FOCAL POWER ALONG THE OTHER PRINCIPAL MERIDIAN Abstract of the Disclosure An apparatus, including a pair of spaced-cylinder lenses having their cylinder axes in one plane with a third cylinder lens slidably 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 slidable carriage is supported by a track running parallel to the optical axis.

281441

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