| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filter for a light receiving element, which sufficiently eliminates disturbance due to sunlight and the like in outdoors. <P>SOLUTION: The filter for the light receiving element is configured so that when the energy density of the disturbance light in the light receiving element is represented by N1 and the energy density of a signal light in the light receiving element is represented by N2, N1/(N2)<SP>2</SP>is minimized under constraints. <P>COPYRIGHT: (C)2010,JPO&INPIT |
