Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2007-04-26
2010-10-19
Hess, Daniel A (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
Reexamination Certificate
active
07815119
ABSTRACT:
Contamination in a feedback signal is eliminated in a laser scanning arrangement having a drive coil driven by a drive signal formed as a periodic train of drive pulses to oscillate a scan mirror and a light beam reflected from the scan mirror. A feedback coil generates a feedback signal during oscillation of the scan mirror, the feedback coil being in proximity with the drive coil and being subject to corruption by cross-coupling between the coils. The drive coil is not driven with at least one drive pulse during a quiet time period. Cross-coupling is eliminated by generating the feedback signal only during the quiet time period, and by monitoring a position of the scan mirror by processing the feedback signal which was generated only during the quiet time period.
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Hess Daniel A
Kirschstein et al.
Symbol Technologies Inc.
Tardif David
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