| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical device and the like capable of effectively removing dust deposited on a substrate through which light is transmissible. <P>SOLUTION: The present invention relates to an optical device including a plurality of electrodes 42 provided on a substrate 36, through which light is transmissible, for transmitting light therethrough and an output circuit 28 which outputs a voltage to the plurality of electrodes so as to change an electric field on a surface of the substrate. <P>COPYRIGHT: (C)2010,JPO&INPIT |
