Variable focal lens having a divergent front element

Details Variable focal lens having a divergent front element Variable focal lens having a divergent front element

1976-09-27

1978-07-11

Sacher, Paul A.

G02B 1514

Patent

active

040998444

ABSTRACT:
Variable focus lens systems having a fixed divergent lens element, a movable convergent lens component, and a basic objective lens group having a fixed lens element and a movable lens component, the movable lens component of the basic objective lens group being coupled to the convergent lens component for movement therewith in the same direction but over a proportionally lesser distance.

REFERENCES:
patent: 2741947 (1956-04-01), Back
patent: 3051052 (1962-08-01), Bergstein

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