Basic lens assembly for series of zoom objectives of different v

Details Basic lens assembly for series of zoom objectives of different v Basic lens assembly for series of zoom objectives of different v

1976-08-10

1978-01-03

Sacher, Paul A.

350176, 350185, 350202, G02B 1516, G02B 1700

Patent

active

040663400

ABSTRACT:
A zoom objective is disclosed which consists of a varifocal front lens group and a fixed rear lens group, the front lens group comprising a stationary first component of positive refractivity, axially shiftable second and third components of negative refractivity, and a stationary fourth component of positive refractivity separated from the rear lens group by a reflex prism adjoining a diaphragm space. The assembly of third and fourth components, prism and rear lens group can be selectively combined with various first and second components to provide zoom objectives of different varifocal ratios.

REFERENCES:
patent: 3273457 (1966-09-01), Macher et al.
patent: 3820876 (1974-06-01), Macher
patent: 3891304 (1975-06-01), Muszumanski

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