Microfilm reader/printer zoom lens system

Details Microfilm reader/printer zoom lens system Microfilm reader/printer zoom lens system

1992-04-06

1993-10-19

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359676, G02B 1514

Patent

active

052551237

ABSTRACT:
A zoom lens system having a large magnification is particularly useful in micrographic reader/printers, and any type of projection lens system. The lens comprises at least three components. The first component is provided with a fixed aperture stop. The other two components are axially movable for zooming.

REFERENCES:
patent: 3724927 (1973-04-01), Cox
patent: 4708444 (1987-11-01), Tsuji
patent: 4733951 (1988-03-01), Pareigat
patent: 4743102 (1988-05-01), Pareigat
patent: 4746204 (1988-05-01), Pareigat
patent: 4750820 (1988-06-01), Pareigat
patent: 4824236 (1989-04-01), Ueda

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