Plane linear grating for optically encoding information
US4528448A · kind A · utility
31Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 1982 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | May 13, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/30
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An encoding disk including a multiplicity of linear gratings placed accurately on the disk to diffract a light beam to a fixed point in space accurately does so independently of the centering of the disk on its axis of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.