| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make initial quality constant, without enlarging a light-receiving element, and to maintain precision in temperature correction, or the like. <P>SOLUTION: In a method for condensing to the light receiving element 3 in a raindrop detector 100, the radius of condensing spots is set to 1/2 to 3 times larger than the chip size of the light-receiving element 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
