Method for displaying state of multi-optical-axis photoswitch and multi-optical-axis photoswitch adapted to the method
US6414603B1 · kind B1 · utility
28Cited by
18References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jun 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-optical-axis photoswitch incorporating a light emitting unit and a light receiving unit between which a multiplicity of optical axes exist. In the multi-optical-axis photoswitch, the ratio of the number of optical axes in which the quantity of received light exceeds a predetermined threshold value with respect to the number of all of optical axes is displayed by a plurality of display lamps disposed concentrically, in particular, by a bar graph. Thus, the operation can be indicated such that movement must be performed in a direction in which the value of the bar graph is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.