Reflecting illumination type projecting device

Details Reflecting illumination type projecting device Reflecting illumination type projecting device

1991-04-25

1993-03-09

Cuchlinski, Jr., William A.

Optics: image projectors

Episcope

Reflector between lamp and screen

353 67, 353DIG4, G03B 2128, G03B 2108

Patent

active

051929619

ABSTRACT:
A reflecting illumination type projecting device includes a projecting lens having an optical axis intersecting an object to be tested, a light source portion for illuminating the object through the projecting lens, a screen onto which an image of the object is projected by light reflected on the object through the projecting lens, and an optical path separating element disposed in the vicinity of an exit pupil, the element being formed with a total reflecting mirror portion for reflecting either the illuminating light or the reflected light and with a transmitting portion for transmitting the remaining light, thereby to make the illuminating light incident to the projecting lens and to guide the reflected light toward the screen.

REFERENCES:
patent: 3064523 (1962-11-01), Meltzer
patent: 3331688 (1967-07-01), Altman
patent: 3479512 (1969-11-01), Weissenberg
patent: 3486817 (1969-12-01), Hubner
patent: 3525566 (1970-08-01), Altman
patent: 3946222 (1976-03-01), Swanberg
patent: 4081807 (1978-03-01), Urano et al.
patent: 4609268 (1986-09-01), Crawford
patent: 4735500 (1988-04-01), Grunwald
patent: 4824210 (1989-04-01), Shimazaki

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