| 摘要 |
A reflection-type optical sensor is provided wherein misjudgment is prevented in detecting the existence of an object and determining whether a distance to the object is large or small. A housing is molded from white polycarbonate resin and has a light-projecting portion and a light-receiving portion. A light-projecting lens and a light-emitting device are mounted in a light-projecting chamber formed in the light-projecting portion. A light-receiving lens and a light-receiving device are mounted in a light-receiving chamber formed in the light-receiving portion. Those of the wall surfaces of the light-projecting chamber and the light-receiving chamber which are illuminated with light are light reflection-promoting surfaces that promote the reflection of light. The light reflection-promoting surfaces can be smooth surfaces, surfaces painted in white, inner surfaces of auxiliary members fabricated as separate parts from aluminum, or the like.
|
