Zoom lens

Details Zoom lens Zoom lens

1988-05-02

1989-06-27

Corbin, John K.

G02B 1522, G02B 964

Patent

active

048423858

ABSTRACT:
The disclosed zoom lens employs rear focusing with inclusion of two lens portions, or a varifocal portion and a focusing portion arranged respectively from front (object) to rear (image). The components of the varifocal and focusing portions are arranged such that for a given finite object distance, the position of an image plane of the entire system is maintained constant despite zooming of the varifocal portion.

REFERENCES:
patent: 4465343 (1984-08-01), Horimoto
patent: 4492437 (1985-01-01), Masumoto et al.
patent: 4586793 (1986-05-01), Tanaka et al.

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