Three-lens system providing a variable focal power along one...

Details Three-lens system providing a variable focal power along one... Three-lens system providing a variable focal power along one...

G - Physics

02

B

88/100

G02B 15/14 (2006.01) G02B 13/08 (2006.01)

Patent

CA 1073717

THREE-LENS SYSTEM PROVIDING A VARIABLE FOCAL POWER ALONG ONE PRINCIPAL MERIDIAN Abstract of the Disclosure Variable focal power along one principal meridian may be obtained by an optical system having two cylinder lenses at either end and their axis of cylinder in a single plans spaced along an optical axis. A moveable cylinder lens with its axis oriented 90° to the plane is slideably mounted therebetween. A plano color correction plats substantially eliminates color aberrations which would otherwise be present in the system.

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