| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a position converter which can be manufactured at low cost for improving the signal-to-noise ratio of an output to be obtained from a detector, and for obtaining a stable output even when a temperature changes.SOLUTION: A position converter 100 includes: a butterfly-shaped reflector 7 attached to a rotary shaft 2 of a rotation limiting motor 1; an LED die 4 disposed so as to be faced to the central part of the reflection surface of the butterfly-shaped reflector 7; a diffused light absorbing member disposed on the surface of a diffused light absorber 3 and a case 5 disposed at the stationary side of the rotation limiting motor 1 such that the butterfly-shaped reflector 7 is surrounded with a distance from the butterfly-shaped reflector 7 behind the butterfly-shaped reflector 7 when viewed from the LED die 4 for absorbing irradiation light from the LED die 4 which does not hit the reflection surface; and a plurality of detectors 11 mounted on a print board 6 on the same surface of which the LED die 4 is mounted for detecting an image reflected by the butterfly-shaped reflector 7.</p> |
