WO2008039963A3 - Laser power control arrangements in electro-optical readers - Google Patents
Laser power control arrangements in electro-optical readers Download PDFInfo
- Publication number
- WO2008039963A3 WO2008039963A3 PCT/US2007/079815 US2007079815W WO2008039963A3 WO 2008039963 A3 WO2008039963 A3 WO 2008039963A3 US 2007079815 W US2007079815 W US 2007079815W WO 2008039963 A3 WO2008039963 A3 WO 2008039963A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electro
- power control
- control arrangements
- optical readers
- laser power
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10554—Moving beam scanning
- G06K7/10564—Light sources
- G06K7/10584—Source control
Abstract
Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of operating conditions not conforming to preestablished standards, and adjust power to enhance reader performance without violating prevalent safety standards. Dual monitors are used to independently monitor the output power of the laser.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/528,909 US7743989B2 (en) | 2006-09-28 | 2006-09-28 | Laser power control arrangements in electro-optical readers |
US11/528,909 | 2006-09-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2008039963A2 WO2008039963A2 (en) | 2008-04-03 |
WO2008039963A3 true WO2008039963A3 (en) | 2008-08-07 |
WO2008039963B1 WO2008039963B1 (en) | 2008-09-25 |
Family
ID=39231000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/079815 WO2008039963A2 (en) | 2006-09-28 | 2007-09-28 | Laser power control arrangements in electro-optical readers |
Country Status (2)
Country | Link |
---|---|
US (1) | US7743989B2 (en) |
WO (1) | WO2008039963A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7743989B2 (en) | 2006-09-28 | 2010-06-29 | Symbol Technologies, Inc. | Laser power control arrangements in electro-optical readers |
US8028918B2 (en) * | 2007-10-31 | 2011-10-04 | Symbol Technologies, Inc. | Enhanced monitoring of laser output power in electro-optical readers |
US8002186B2 (en) * | 2008-10-23 | 2011-08-23 | Symbol Technologies, Inc. | Laser power control arrangements in electro-optical readers |
US8167208B2 (en) * | 2010-06-23 | 2012-05-01 | Symbol Technologies, Inc. | Arrangement for and method of controlling monitor photodiode leakage current in lasers in electro-optical readers |
US8508791B1 (en) * | 2012-01-23 | 2013-08-13 | Xerox Corporation | Image feedforward laser power control for a multi-mirror based high power imager |
US9318153B2 (en) | 2014-03-31 | 2016-04-19 | Seagate Technology Llc | HAMR drive fault detection system |
US9336831B2 (en) * | 2014-10-10 | 2016-05-10 | Seagate Technology Llc | HAMR drive fault detection system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060016891A1 (en) * | 2004-07-23 | 2006-01-26 | James Giebel | Laser power control arrangements in electro-optical readers |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4575625A (en) * | 1983-09-27 | 1986-03-11 | Knowles Carl H | Integral hand-held laser scanner |
US7428995B1 (en) * | 1993-10-25 | 2008-09-30 | Symbol Technologies, Inc. | Scanning devices and methods using surface emitting laser diodes |
JPH10172170A (en) * | 1996-10-09 | 1998-06-26 | Sanyo Electric Co Ltd | Optical pickup device and its production |
JP2002178559A (en) * | 2000-12-14 | 2002-06-26 | Asahi Optical Co Ltd | Output controlling circuit for laser scanning unit |
US7346087B2 (en) * | 2005-03-04 | 2008-03-18 | Finisar Corporation | Method for performing eye safety measurements on laser emitter devices |
US7743989B2 (en) | 2006-09-28 | 2010-06-29 | Symbol Technologies, Inc. | Laser power control arrangements in electro-optical readers |
-
2006
- 2006-09-28 US US11/528,909 patent/US7743989B2/en active Active
-
2007
- 2007-09-28 WO PCT/US2007/079815 patent/WO2008039963A2/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060016891A1 (en) * | 2004-07-23 | 2006-01-26 | James Giebel | Laser power control arrangements in electro-optical readers |
Also Published As
Publication number | Publication date |
---|---|
WO2008039963A2 (en) | 2008-04-03 |
US7743989B2 (en) | 2010-06-29 |
US20080078835A1 (en) | 2008-04-03 |
WO2008039963B1 (en) | 2008-09-25 |
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