Method and apparatus for making positive copies from diapositive

Details Method and apparatus for making positive copies from diapositive Method and apparatus for making positive copies from diapositive

1986-07-09

1988-03-01

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358214, 358 78, H04N 146

Patent

active

047290153

ABSTRACT:
Diapositives are copied on negative photosensitive paper in an apparatus wherein the positive is electronically scanned, line-by-line, and the thus obtained density signals are electronically inverted prior to influencing the beam of a CRT or laser which is used to reproduce the image of the positive on paper, either line-by-line or point-by-point. The inversion of signals renders it possible to scan the high-transmissivity portions of the positives with a narrow beam, i.e., with a high degree of resolution.

REFERENCES:
patent: 4349835 (1982-09-01), Horiguchi et al.
patent: 4368484 (1983-01-01), Stemme
patent: 4393398 (1983-07-01), Horiguchi et al.

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