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公开(公告)号：EP2835617B8
公开(公告)日：2017-02-22
申请号：EP13849910.8
申请日：2013-10-25
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
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公开(公告)号：EP2835617B1
公开(公告)日：2016-12-07
申请号：EP13849910.8
申请日：2013-10-25
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
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公开(公告)号：EP2835617A1
公开(公告)日：2015-02-11
申请号：EP13849910.8
申请日：2013-10-25
IPC分类号： G01D5/347
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
摘要： Provided is a position transducer which can be manufactured at low cost, improve the signal-to-noise ratio of an output obtained from a detector, and obtain a stable output even if the temperature changes. A position transducer 100 includes a butterfly-shaped reflector 7 attached to a rotating shaft 2 of a rotation restriction motor 1, an LED die 4 disposed to face a central portion of the reflection surface of the reflector 7, a diffused-light absorbing member disposed on the surfaces of a diffused light absorber 3 and a case 5, installed on the fixed side of the motor 1 so as to surround the reflector 7 with a distance from the reflector 7 at the rear of the reflector 7 as viewed from the LED die 4 and absorbing illumination light from the LED die 4 which has not illuminated the reflection surface, and detectors 11 mounted on the same printed circuit board 6 as the LED die 4 to detect an image reflected by the reflector 7.
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