发明名称 |
Non-contact optical polarization angle encoder |
摘要 |
An optically coupled rotary encoder that is capable of measuring and encoding the angle of rotation of a rotating or stationary object. A polarizer rotates synchronously with the rotatable object and inputs broadband or single frequency unpolarized light. The polarizer outputs and directs polarized light towards a plurality of fixed analyzers and light detectors. Each fixed analyzer outputs and directs further polarized light towards one of the light detectors. Each light detector outputs an electrical signal to a phase processor based upon one attribute of the further polarized light. The phase processor outputs a phase angle with high resolution (>10 bit) with high accuracy and frequency (5 Mhz). The system and method can operate in harsh environments having high temperatures, dirt and debris and is not susceptible to EMI/RFI.
|
申请公布号 |
US2003095257(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
US20020288875 |
申请日期 |
2002.11.06 |
申请人 |
WIJNTJES GEERT JOHANNES;MARKOS CONSTANTINE T. |
发明人 |
WIJNTJES GEERT JOHANNES;MARKOS CONSTANTINE T. |
分类号 |
G01D5/34;G01D5/347;(IPC1-7):G01J4/00 |
主分类号 |
G01D5/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|