Light source for use in optical encoders has output of the light emitting diode directed through a pair of plain convex lenses

摘要

The light source (214A) directs light onto an encoder disc (212) and that transmitted is received by a detector (214B) with two sensor surfaces. The light source has a light emitting diode (2140) and the output is directed through a collimator having a pair of plain convex lenses (2144) that provide two beams.