Pancratic objective

Details Pancratic objective Pancratic objective

1978-06-01

1981-04-14

Sacher, Paul A.

G02B 1516

Patent

active

042616484

ABSTRACT:
An objective of the pancratic type includes a varifocal front lens group and a fixed-focus rear lens group, the latter consisting of five air-spaced singlets. The front lens group is constituted by a positive first component consisting of three singlets, an axially shiftable negative second component consisting of a singlet and a doublet, and an axially shiftable positive third component in the form of a nearly planoconvex singlet of low power.

REFERENCES:
patent: 3784283 (1974-01-01), Muszumanski et al.
patent: 4105291 (1978-08-01), Tsuji

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