Process for the photographic production of given transparency or density distributions
US3930855A · kind A · utility
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8References
5Claims
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Assignee
Inventor
Key dates
| Filing date | Apr 10, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Apr 10, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F1/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic process for the production of density profiles or transparency profiles in photographic layers comprising the steps: determination of the characteristic curve of the emulsion layer in the usual manner, graphic determination of the brightness distribution required for the subsequent exposure on the same photographic material, producing the brightness distribution determined in stage 2 by anamorphotic optical means and exposing the photographic material making use of this brightness distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.