Hologram scale, apparatus for making hologram scale, moving member having hologram scale assembled hologram scale and apparatus for making assembled hologram scale
US5225918A · kind A · utility
37Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Jul 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for making a hologram scale is comprised of a reference diffraction grating on which a light becomes incident and from or by which the incident light is emitted or reflected as a diffracted light, and a recording material, wherein at least two diffracted lights of the diffracted light are caused to interfere with each other as an object wave and a reference wave so as to form a hologram scale on the recording material. Further, an apparatus for making an assembled hologram scale, a hologram scale, an assembled hologram scale and a moving member having a hologram scale are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.