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JPS60123678

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DESCRIPTION JPS60123678
[0001]
Brief description of the drawings
[0002]
1 is a perspective view showing an example of a conventional ultrasonic transducer using five
horns, FIG. 2 is a graph showing a conventional small diameter ultrasonic transducer without a
horn and directivity characteristics, FIG. 3 Is a camera with an ultrasonic autofocus mechanism
according to the present invention? Fig. 5 is a perspective view showing a housing configuration
of the embodiment, Fig. 5 is a perspective view showing an ultrasonic transducer using four
embodiments, Fig. 5 is a front view, Fig. 6 is each FIG. 7 is a perspective view showing an
example of an ultrasonic transducer, FIG. 7 is a graph 1 showing directivity characteristics of the
ultrasonic transducer used in the embodiment, and FIG. 8 is each bending type piezoelectric
vibrator of the ultrasonic transducer It is a circuit diagram which shows the connection relation
between and and a drive circuit. DESCRIPTION OF SYMBOLS 10 ... Housing | casing 11, 11 ...
Lens, 12 ... Ultrasonic wave transmission-and-reception element, 20 ... Ultrasonic wave
transmitter-receiver, 23 ... Bending-type piezoelectric vibrator, 26 ... Drive circuit. −180−
04-05-2019
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