Photosensor and output control therefor
US4605848A · kind A · utility
7Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1983 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Oct 17, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of controlling an output of a photosensor which comprises a light emitting element and a light receiving element. The quantity of light emanating from the light emitting element is varied from a predetermined value. A quantity of light output from the light emitting element when the output level of the light receiving element has reached a predetermined value is detected. This specific light quantity is multiplied by a predetermined value larger than or smaller than 1 (one), thereby preparing a reference light quantity for the light receiving element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.