Objective lens exchanging arrangement in a microfilm reader

Details Objective lens exchanging arrangement in a microfilm reader Objective lens exchanging arrangement in a microfilm reader

1980-12-11

1983-02-01

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

G03B 300

Patent

active

043712428

ABSTRACT:
In a microfilm reader, an objective lens tube removal or exchanging arrangement which includes a cylindrically shaped supporting casing for the objective lens tube. The objective lens tube is, for focusing purposes, slidably adjustably mounted along its optical axis in the cylindrically shaped supporting casing. The cylindrically shaped supporting casing has an opening which is sufficiently large to permit the removal or exchange of the objective lens tube therethrough in a direction substantially normal to the optical axis of the objective lens.

REFERENCES:
patent: 3475091 (1969-10-01), Smitzer et al.
patent: 4123699 (1978-10-01), Persha et al.
patent: 4135778 (1979-01-01), Lincoln

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