Distance measuring device with plural differing reference voltages
US4976537A · kind A · utility
3Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance measuring device is provided with a plurality of comparators which are respectively connected to a plurality of light receiving elements for receiving light reflected from a subject. The plurality of comparators detect the levels of output signals of the light receiving elements. The comparators are supplied with reference voltages to be used for comparison with the output signals, the reference voltages being set different for each comparator according to the distance from whic the respective light receiving element receives light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.