| 摘要 |
The device has a transmitter for providing nonpolarized light, and a polarizer (20) designed as a circular disk. A receiver measures luminosity of light passing through the polarizer for generating a position-dependent signal. A polarizing filter is positioned in front of the receiver, where the receiver and the polarizer move relative to each other based on relative position of two objects. The polarizer has two different polarizing directions, where optical axis of the transmitter is arranged parallel to a rotational axis (D) of the objects. The transmitter is designed as a nonpolarized light source i.e. LED. |
