Question:
What are the typical applications of built-in type Photomicrosensors (photointerrupters)?
Answer:
The built-in type Photomicrosensors(photointerrupters) are commonly used for object presence and absence detection, disk rotation counting, positioning of moving objects and rotating direction detection (for encoder use).
Explanation:
Here are some examples of typical applications using each of the two types of Photomicrosensors: transmissive (slot) type and reflective type.
Quick tips
Photomicrosensors (with a phototransistor output) detect the presence and absence of an object by the proportion of the amount of light received (i.e. signal/noise ratio). So, if a transmissive (slot type) Photomicrosensors senses a semi-transparent object or a reflective Photomicrosensors detects marked objects, the proportion of the amount of light received will result in a lower value.
A Photomicrosensors is composed of semiconductor elements so the light output and light intensity varies. This is referred to as the light current (IL) for Photomicrosensors with a phototransistor output. The circuit should be configured in such a way that the selected Photomicrosensors detects both the upper and the lower limit of the light current described in the datasheet.
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