Focusing system for a transparency projector

Details Focusing system for a transparency projector Focusing system for a transparency projector

1986-12-22

1988-05-17

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

250250, G03B 2114

Patent

active

047446528

ABSTRACT:
A focusing system for slide projectors and the like in which the lens is mounted in a replaceable shift ring which can be selected from a set of such rings with different offsets between the lens axis and the projector axis. The ring can be assembly-affixed on a plate which can be clamped against the projector housing over the projection lens aperture thereof.

REFERENCES:
patent: 4266855 (1981-05-01), Mohr

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