| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light emitting/receiving unit which is easy to reduce the size, can be manufactured at low cost, and can be used for estimating the color of an object accurately. <P>SOLUTION: A light emitting/receiving unit 20 includes plural LEDs 21 for emitting light with mutually different wavelengths toward a color estimation object, and plural photo diodes 22 for receiving the light emitted from the plural LEDs 21 and reflected on the color estimation object. A substrate 23 of the light emitting/receiving unit 20 is mounted with the plural photo diodes 22 and also mounted with the plural LEDs 21 so that they have approximately the same positional relationship with respect to the plural photo diodes 22. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
