| 摘要 |
<p>PURPOSE:To provide a minute spot reflection type sensor head capable of surely detecting even a detected object, whose reflectance is low, without causing crosstalk at all. CONSTITUTION:A reflection type optical fiber unit used for an optical fiber type photoelectic switch is provided with a light transmitting optical fiber 101, a lens 103 condensing the light projected from the optical fiber 101 on a desired position, and one or plural light receiving optical fibers 102 receiving the light reflected by the detected object 104. The optical fibers 102 are arranged in parallel with an optical axis on the peripheral part of the lens 103.</p> |
