Infra red photography with silver halide films using infrared and visible light exposures
US4018608A · kind A · utility
32Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1975 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Oct 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/164
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for photographing infra red events onto silver halide film including the steps of focusing the infra red radiation directly onto the film to alter the sensitivity of the film to visible light, then flashing the film with a uniform field of visible light at the moment when the sensitivity-altering effect of the infra red is optimum, thereby producing a latent image whose density when developed will vary with the interrelationship between the integrated exposure of the film to infra red and to visible radiation at various discrete areas of the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.