Variable focal length lens system

Details Variable focal length lens system Variable focal length lens system

1986-10-16

1988-01-26

Corbin, John K.

350432, G02B 1516

Patent

active

047213710

ABSTRACT:
A variable focal length lens system comprising a first lens unit having positive refractive power, a second lens unit comprising a negative lens, and a third lens unit comprising a positive lens and arranged that the focal length of the lens system as a whole is varied from the short focal length to the long focal length by moving the first and second lens units toward the object side along the optical axis, the variable focal length lens system being arranged very compactly, i.e., arranged that the overall length of the lens system is very short and the outer diameter thereof is very small.

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