| 摘要 |
PROBLEM TO BE SOLVED: To generate a sonic wave by efficiently performing optical/thermal conversion using light. SOLUTION: The speaker includes: a chamber having air-tightness; a first reflector to which light advancing in a predetermined direction is incident at a predetermined position and which is disposed within the chamber in such a way that an incident angle does not become 0; a second reflector, disposed within the chamber, to which light reflected by the first reflector is incident; a medium which is sealed in the chamber and generates a sonic wave with photo-acoustic effects; and a vibrating member provided between the medium and the outside of the chamber for transferring the sonic wave generated by the medium to the outside of the chamber. COPYRIGHT: (C)2010,JPO&INPIT
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