Optical: systems and elements – Optical modulator – Light wave directional modulation
Reexamination Certificate
2006-05-30
2006-05-30
Dang, Hung (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave directional modulation
C359S311000, C359S285000, C359S323000
Reexamination Certificate
active
07054055
ABSTRACT:
An acousto optic element comprises optically transparent acousto optic medium having light incoming plane, light outgoing plane facing light incoming plane, transducer joining plane, and inclined plane tilted to transducer joining plane and piezoelectric transducer on which two opposing planes i.e., electrode layers and are formed and the transducer is connected to transducer joining plane of acousto optic medium through one of the electrode layers, wherein a deposited layer or a coating layer is formed on at least one of ultrasonic transducer or the acousto optic medium, the layer preventing ultrasonic waves generated by oscillation of ultrasonic transducer leaking onto acousto optic medium as a leakage-ultrasonic wave and propagating there, thus obtaining a high light-fading ratio.
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Ishimura Yoshiaki
Nishiyama Toshimi
Shibuya Kimihiko
Takeuchi Hiroyuki
Dang Hung
Rossi Kimms & McDowell LLP
Tra Tuyen
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