Autofocusing system for a laser transmitter
US5867522A · kind A · utility
9Cited by
5References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10811
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An autofocusing system for a laser transmitter is provided. A laser beam is swept across a target having a plurality of sections. The target includes a first reflective section and a second reflective section with a non-reflective section positioned therebetween. A photodetector detects a signal representative of the laser beam reflected from the target. The laser beam is focused by adjusting the focusing lens until a ratio of the duration of the non-reflective portion of the signal to the sum of the durations of the reflective portions of the signal is maximized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.