| 摘要 |
PURPOSE:To ensure the complete cleaning for the transparent substance by mounting detatchably the dust-proof transparent substance between the block containing the illuminant and the block containing the light receiving substance, thus preventing the sensor malfunction due to attachment of the dust. CONSTITUTION:The reflection-type dust-proof sensor is formed by two blocks: block 10 containing illuminant 1 and block 11 including light receiving substance 2, condenser lens 3 and mirror 9 each. And slide groove 12 is formed at the unified part of these two blocks, and then dust-proof transparent substance 7 is slided into groove 12. Thus substance 7 can be attached and detacted easily to ensure the complete cleaning. As a result, the malfunction due to attachement of the dust can be prevented. |
