Apparatus for sensing different attenuation windows within an optical scanner
US5459310A · kind A · utility
3Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | May 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2207/1018
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for sensing different attenuation windows within an optical scanner which adjusts the power level of a laser to a maximum safe power level. The apparatus includes an attenuation sensor which senses the amount of attenuation of the laser beam by a first attenuation window, and a laser power adjuster which changes the laser power level to an optimal but safe level based upon the sensed amount of attenuation of the laser beam. The apparatus may also include a detection circuit having a threshold detection level which is capable of being adjusted based upon the laser power level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.