Enhanced monitoring of laser output power in electro-optical...

Details Enhanced monitoring of laser output power in electro-optical... Enhanced monitoring of laser output power in electro-optical...

2011-06-21

2011-06-21

Le, Thien M. (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S454000, C235S462010, C235S462450, C235S472010

Reexamination Certificate

active

07963447

ABSTRACT:
Laser power monitoring arrangements interrupt power to a laser used in electro-optical readers upon detection of operating conditions not conforming to preestablished standards. An auxiliary light detector independently monitors the output power of a laser beam, and directly receives a portion of the laser beam reflected from a diffractive optical lens surface of an optical assembly for optically modifying the laser beam, or from a coated or uncoated inclined surface of a split collimating lens of the optical assembly. The split collimating lens may have its lens portions in mutual contact or separated by an air gap.

REFERENCES:
patent: 4251798 (1981-02-01), Swartz et al.
patent: 5561283 (1996-10-01), Dvorkis et al.
patent: 5635697 (1997-06-01), Shellhammer et al.
patent: 6060722 (2000-05-01), Havens et al.
patent: 7267283 (2007-09-01), Schneider et al.
patent: 7296743 (2007-11-01), Giebel et al.

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