System for making multiple original holograms or copies of a hologram and method
US4209250A · kind A · utility
Inventors
Key dates
| Filing date | Dec 26, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Dec 26, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system for making multiple copies of a hologram or multiple original holograms on successive segments of a continuous length of blank film is disclosed herein. In the former case, this system includes two support arrangements, one for maintaining the original hologram in a fixed planar position and the other for maintaining the successive segments of blank film in a fixed copying position behind the original. In this particular system, the original hologram is held in place between two light transparent support plates, a front plate and a back plate, with the aid of a refractive index matching liquid and each successive segment of blank film is located across the back plate and maintained in a fixed position laterally therefrom solely by means of a continuous layer of preselected liquid substance which, at the same time, functions as an index matching medium. In the latter case or making original holograms, the original hologram just recited and its means for support would not be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.