Internal structure holography
US4792196A · kind A · utility
1Cited by
15References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1986 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Dec 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/04
- 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 a laser beam source positioned external of the structure coupled to a multilayer fiber waveguide which conveys the reference beam and object beam, in at least two different layers of the multilayer fiber, 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.