Patent · US Active

Killswitch arrangement for and method of regulating laser output power in electro-optical readers

US8971366B2 · kind B2 · utility

3Cited by

12References

15Claims

0Family size

Assignee

Symbol Technologies, LLC · US

Inventors

Matthew D. Blasczak · Shirley, US
Chang Hong Chen · Stony Brook, US
Peter Fazekas · Munich, DE
James Giebel · Northport, US
Vladimir Gurevich · Stony Brook, US

Key dates

Filing date	Nov 2, 2012
Grant date	Mar 3, 2015
Priority date	—
Expiry date	Nov 2, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/06825
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Output power of a laser beam emitted by a laser in an electro-optical reader is regulated by storing a killswitch byte in non-volatile memory, and by checking whether the killswitch byte is in a default state or a kill state prior to performing reading. A controller detects a fault condition and responsively changes the killswitch byte to the kill state, in order to permanently deenergize the laser and to maintain the laser permanently deenergized after the killswitch byte has been changed to the kill state.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.