Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2007-10-16
2007-10-16
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S286000, C359S287000, C359S305000, C359S311000, C359S312000, C359S313000, C359S314000
Reexamination Certificate
active
11391829
ABSTRACT:
An acousto-optic (AO) device for generating a highly apodized acoustic wave field includes a piezoelectric transducer crystal for emitting an acoustic wave having a ground electrode disposed on one side of the piezoelectric crystal, and a patterned electrode layer disposed on a side of the piezoelectric crystal opposite the ground electrode. The patterned electrode layer includes a continuous region proximate to its center and a discontinuous region, a pattern in the discontinuous region including a plurality of spaced apart features electrically connected to the continuous region. An AO interaction crystal which receives the acoustic wave is attached to the ground electrode or the patterned electrode layer. A feature size of the features in the pattern are sufficiently small to provide a fine structure far field condition for the acoustic wave in the AO interaction crystal underlying the discontinuous region beginning <5 mm measured from an interface between the piezoelectric crystal and the AO interaction crystal.
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Pannell Christopher N.
Wachman Elliot S.
Akerman & Senterfitt
Gooch and Housego PLC
Jetter Neil R.
Lester Evelyn A.
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