Internal structure holography
US4643514A · kind A · utility
9Cited by
15References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1983 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Jul 29, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/31
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for the holographic examination of the internal features of cavities and passageways of a structure. The apparatus employs laser beam sources positioned within the structure to form a laser reference beam and laser object beam which combine in a holographic recordation means to form a hologram of the internal features of the structure, or under certain circumstances a holographic interferogram of the selected features is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.