Slide projector with automatic slide warpage compensation

Details Slide projector with automatic slide warpage compensation Slide projector with automatic slide warpage compensation

1987-09-04

1988-05-10

Haroian, Harry N.

Optics: image projectors

Lens support

Lens position adjustable

353 69, G01B 300

Patent

active

047431091

ABSTRACT:
A transparency projector includes a support for supporting a transparency generally in a plane, the transparency typically exhibiting a warpage such that its center is displaced from the plane by a pop distance. Means are provided for measuring the pop distance. Means are further provided for projecting light through the transparency, and for focusing the light projected through the transparency onto a viewing plane. These last recited means include a lens having a preselected f-number. A variable aperture is provided, responsive to the pop distance, for increasing the f-number of the lens when the transparency exhibits warpage.

REFERENCES:
patent: 2947215 (1960-08-01), Mitchell
patent: 3198065 (1965-08-01), Bohm
patent: 3416859 (1968-12-01), Badalich
patent: 3606530 (1971-09-01), Hennessy
patent: 3628857 (1971-12-01), Harvey
patent: 3639048 (1972-02-01), Heaney et al.

Affiliated with

Also associated with

Rating

Slide projector with automatic slide warpage compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Slide projector with automatic slide warpage compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slide projector with automatic slide warpage compensation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1316958