| 摘要 |
Opto-electronic sensor comprises a transparent ruler (30) with a succession of opaque graduations (31), a photo-emitter (20) and a photo-receiver (21). Emitter, receiver and integrated optical block (1) are placed on the same integrated circuit board (2). Emitter and receiver are below the ruler, while the optical block has optical surface arranged opposite to each other on both sides of the ruler. |
