Code wheel for a reflective type optical rotary encoder
US4806751A · kind A · utility
125Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1988 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Jun 29, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34707
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A code wheel for use with a reflective type optical rotary encoder which can be produced easily and optically read efficiently. The code wheel includes a non-reflective plate, and a reflective plate having a suitable number of notches formed along a periphery thereof and mounted in an overlapping relationship on the non-reflective plate whereby a reflective portion of the code wheel is formed by a face of the reflective plate between each two adjacent notches while a non-reflective portion is formed by a face of the non-reflective plate exposed through the corresponding notch of the reflective plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.