| 摘要 |
A photoelectric sensor comprises a thin plate-shaped optical body, a circuit block and a tubular casing for incorporating therein the optical body and the circuit block. A signal light incoming through a transparent protector of the casing is reflected upon a first reflective mirror of the optical body. Following this first reflection, a second reflection is made upon a second reflective mirror thereof. The light having passed through a light collecting lens is received by a photoelectric converting element and converted into electric signals for output. Since the optical body comprises a plurality of reflective surfaces, an optical path up to the photoelectric converting element can be incorporated compactly within the thin plate-shaped optical body.
|
