论文信息 - On Modification of the Generalised Conditioning Technique Anti-windup Compensator

On Modification of the Generalised Conditioning Technique Anti-windup Compensator

In a zoom lens comprising three lens groups of positive, positive, and negative in which, upon changing power from its wide angle end to telephoto end, all the three lens groups are moved toward the object side while changing distances between the lens groups, so as to attain variable power; each lens form of the first lens group is specified, and predetermined conditional expressions are satisfied, so as to yield optical performances which are satisfactory to professionals and high-standard amateurs. Upon changing the power from the wide angle end to telephoto end, the air gap between the first lens group G1 and the second lens group G2 increases, while the air gap between the second lens group G2 and the third lens group G3 decreases. Further, this zoom lens satisfies the following conditional expressions (1) to (3): 2.2</=f2/f1</=6.6(1) 2.2</=f2/fw</=5.0(2) -1.1</=R3/fw</=0.5(3)

Dariusz Horla

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