| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical filter for an illuminance sensor that has spectral characteristics close to human visibility characteristics, has high detection accuracy, and also can be manufactured at low cost. <P>SOLUTION: The method comprises the steps of (a) punching a hole in a glass plate, (c) placing a glass small piece 7 having a filter effect into the hole, (d) softening the glass small piece 7, and (e) polishing the glass plate. <P>COPYRIGHT: (C)2013,JPO&INPIT |
