Image transparencies

Details Image transparencies Image transparencies

1991-06-28

1994-06-21

Hess, B. Hamilton

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427146, 427152, 428195, 428913, 428914, 503227, B41M 5035, B41M 538

Patent

active

053227328

ABSTRACT:
An improved image transparency or slide is disclosed in which certain small image anomalies are rendered invisible to the human eye in an image projected from the slide. A diffusion layer spaced a finite distance from an image coating of the slide causes disappearance of the anomalies in a the projected image. In applications requiring particularly high sharpness, the image is formed on the slide using image enhancement techniques which produce exaggerated edge effects in the image. When these exaggerated edge effects are diffused in a projection, the projected image is sharp and free of the anomalies.

REFERENCES:
patent: 4054916 (1977-10-01), Knop
patent: 4197583 (1980-04-01), Westell et al.
patent: 4279003 (1981-07-01), Schulz
patent: 4536803 (1985-08-01), Hennig
patent: 4646355 (1987-02-01), Petrick et al.
patent: 4670793 (1987-06-01), Yamada et al.

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