Metal vessel having hologram of diffraction grating formed thereon
US5193014A · kind A · utility
12Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Aug 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/13
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The metal vessel of the present invention is characterized in that a relief type hologram or relief type diffraction grating is formed on at least a part of the vessel by coining. By forming this hologram or diffraction grating by coining, the dimensional precision or reproducibility of the hologram of diffraction grating is highly improved. The metal vessel having the hologram formed thereon is excellent in the design and decorative characteristics, and in the metal vessel having the diffraction grating formed thereon, changes of the inner pressure can be easily detected by utilizing this diffraction grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.