| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a direction detection element capable of being miniaturized and thinned down and accurately detecting the direction of incident light. <P>SOLUTION: Four rectangular contact pads 201-204 are arranged on four PIN photodiodes on a substrate. Among the contact pads 201-204, four walls 301-304 radially extended at an angle of 90 degrees to each other with a reference point P as a center are provided, and a light-absorbing body 8 is disposed on the walls 301-304. A recess 10 is formed along one side of the walls 301-304 and a groove 11 is formed along the other side and the side around an end part. Rectangular light receiving areas 101-104 of the PIN photodiodes are formed so as to be adjacent to the walls 301-304. The walls 301-304 are made curved, whereby the walls 301-304 are vertically erected. Light with which the walls 301-304 are irradiated, is absorbed by the light-absorbing body 8, and any reflection does not occur. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
