Optics: measuring and testing – For light transmission or absorption
Reexamination Certificate
2005-12-27
2005-12-27
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
C356S239700, C219S121630, C219S121640, C219S121830, C250S559290
Reexamination Certificate
active
06980296
ABSTRACT:
Methods for measuring laser light transmissivity of a specific position in a work piece prior to the work piece undergoing laser welding at the specific position with a laser beam having a specific welding wavelength. To obtain a baseline measurement reading, a laser light source projects a laser beam at the welding wavelength directly into a detector. Thereafter, the work piece becomes suspended between the laser light source and detector whereby an output of the detector now corresponds to a work piece measurement reading. Differences between the two readings reveal whether the work piece will yield a satisfactory weld at the specific position when later welded by a laser beam at the welding wavelength. Preferred work pieces include inkjet printhead lids and bodies.
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Kwan Kin-Ming
Laurer Jonathan H.
Rodgers Audrey D.
Shadwick David T.
Lexmark International Inc.
Nguyen Sang H.
Sanderson Michael T.
Toatley , Jr. Gregory J.
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