发明名称 |
Optical encoding that utilizes total internal reflection |
摘要 |
A coding element such as a codewheel includes first and second surfaces that are configured with respect to each other and with respect to a light beam such that the light beam is reflected at the two surfaces using the optical phenomenon of total internal reflection. The coding element also includes a coding pattern that is aligned in an optical path of the light beam after the light beam has reflected off of both of the surfaces. A coding element with surfaces that reflect a light beam as a result of total internal reflection can be utilized in an encoding system that operates in transmission while the light source and the photodetector array are located on the same side of the coding element.
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申请公布号 |
US7145127(B2) |
申请公布日期 |
2006.12.05 |
申请号 |
US20040926243 |
申请日期 |
2004.08.25 |
申请人 |
AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD. |
发明人 |
CHIN YEE LOONG;FOO SIANG LEONG;CHONG CHEE KEONG |
分类号 |
G01D5/34;H01J3/14;H03M1/22 |
主分类号 |
G01D5/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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