发明名称 |
Position transducer having optical beam generator for covering wide detectable range |
摘要 |
A position transducer determines a current key position through variation of light intensity interrupted by a shutter plate attached to a key, and a semi-column shaped convex lens elongates the light beam radiated from an optical fiber in a direction parallel to the trajectory of the key so that the light beam fully covers the motion of the shutter plate.
|
申请公布号 |
US5804816(A) |
申请公布日期 |
1998.09.08 |
申请号 |
US19960755603 |
申请日期 |
1996.11.25 |
申请人 |
YAMAHA CORPORATION |
发明人 |
YAMAMOTO, JUN;SASAKI, TSUTOMU |
分类号 |
G01B11/00;G01D5/34;G01V8/14;G10H1/055;G10H1/34;H01H35/00;H03K17/78;(IPC1-7):G06M7/00 |
主分类号 |
G01B11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|