Apparatus and method for driving capacitive electromechanical transduction apparatus
First Claim
1. An apparatus configured to drive a transduction apparatus, including a cell with a first electrode and a second electrode disposed so as to oppose each other via a gap, configured to receive an acoustic wave generated in an object irradiated with a pulsed light, the apparatus comprising:
- a timing detector configured to detect a timing of outputting of the pulsed light periodically from a light source; and
a current detection unit configured to detect a current signal that is output from the first electrode by receiving the acoustic wave that is generated by the pulsed light,wherein the current detection unit converts the current signal into a voltage signal,wherein the first electrode outputs a first current signal for at least some time during a predetermined period from the timing of outputting of the pulsed light, andwherein the current detection unit doesn'"'"'t convert the first current signal.
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Abstract
An apparatus is configured to drive a transduction apparatus including a cell with a first electrode and a second electrode disposed so as to oppose each other via a gap. The apparatus includes a timing detection unit and a control unit. The timing detection unit detects a timing of outputting of an electromagnetic wave from an electromagnetic wave source configured to output the electromagnetic wave to irradiate an object to be measured. The control unit drives and controls the transduction apparatus in synchronization with the detected timing such that the capacitive electromechanical transduction apparatus is put in a receiving state only for a period in which an acoustic wave generated in an inside of the object irradiated with the electromagnetic wave is received.
23 Citations
30 Claims
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1. An apparatus configured to drive a transduction apparatus, including a cell with a first electrode and a second electrode disposed so as to oppose each other via a gap, configured to receive an acoustic wave generated in an object irradiated with a pulsed light, the apparatus comprising:
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a timing detector configured to detect a timing of outputting of the pulsed light periodically from a light source; and a current detection unit configured to detect a current signal that is output from the first electrode by receiving the acoustic wave that is generated by the pulsed light, wherein the current detection unit converts the current signal into a voltage signal, wherein the first electrode outputs a first current signal for at least some time during a predetermined period from the timing of outputting of the pulsed light, and wherein the current detection unit doesn'"'"'t convert the first current signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus configured to drive a transduction apparatus, including a plurality of cells each of which includes a first electrode and a second electrode disposed so as to oppose each other via a gap, configured to receive an acoustic wave generated in an object irradiated with a pulsed light, the apparatus comprising:
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a voltage application unit configured to adjust a potential difference between the first electrode and the second electrode; and a timing detector configured to detect a timing of outputting of the pulsed light from a light source, wherein the voltage application unit is connected to the second electrode that is electrically connected in all the plurality of cells included in the transduction apparatus, and wherein, in all the plurality of cells, the voltage application unit makes a potential difference between the first electrode and the second electrode a first predetermined value during a predetermined period from the timing of outputting of the pulsed light. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of driving a transduction apparatus, including a cell with a first electrode and a second electrode disposed so as to oppose each other via a gap, configured to receive an acoustic wave generated in an object irradiated with a pulsed light, the method comprising:
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detecting a timing of outputting of the pulsed light periodically from a light source; and detecting a current signal that is output from the first electrode by receiving the acoustic wave that is generated by the pulsed light, wherein the detecting comprises converting the current signal into a voltage signal, and wherein a first current signal that is output from the first electrode for at least some time during a predetermined period from the timing of outputting of the pulsed light is not converted. - View Dependent Claims (19, 20, 21, 22)
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23. An apparatus configured to drive a transduction apparatus, including a first electrode and a second electrode disposed so as to oppose each other, configured to receive an acoustic wave generated in an object irradiated with a pulsed light, the apparatus comprising:
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a timing detector configured to detect a timing of outputting of the pulsed light periodically from a light source; and a current detection unit configured to detect a current signal that is an output from the first electrode by receiving the acoustic wave that is generated by the pulsed light, wherein the first electrode outputs a first current signal for at least some time during a predetermined period from the timing of outputting of the pulsed light, and wherein the current detection unit doesn'"'"'t detect the first current signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification