Method and apparatus for fabricating a translucent graded densit

Details Method and apparatus for fabricating a translucent graded densit Method and apparatus for fabricating a translucent graded densit

1979-12-31

1981-08-18

Kimlin, Edward C.

Radiation imagery chemistry: process, composition, or product th

Using reflected radiation, e.g., reflex copying, etc.

355 71, 430396, 430321, 430494, G03C 504

Patent

active

042847150

ABSTRACT:
A method and apparatus for exposing a section of photographic medium such that it exhibits an incremental gradient in optical density across an area of the medium. A source of radiant energy is located in a container, which container is covered by a ground glass plate. This plate is covered by an opaque sheet, which sheet contains a narrow aperture. This sheet is covered by a second ground glass plate, such that the edge of the second plate overlies the edge of the aperture. A camera is focused on the surface of the opaque sheet. A portion of the light from the light source is diffused through the edge of the second plate and reflected toward the camera from the surface of the opaque sheet, causing the resultant image captured on the medium when the camera is activated to show a change in optical density with respect to the distance from the image on the medium of the edge of the second plate.

REFERENCES:
patent: 2051584 (1936-08-01), Van der Grinten
patent: 2083215 (1937-06-01), Balaban
patent: 2150805 (1939-03-01), Meulendyke
patent: 3224352 (1965-12-01), Valette
patent: 3394003 (1968-07-01), Montani
patent: 3642477 (1972-02-01), Trusheim
patent: 3694079 (1972-09-01), Harvey
patent: 3996051 (1976-12-01), Meyerhofer
patent: 4021831 (1977-05-01), Bercher
patent: 4083634 (1978-04-01), Momose et al.

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