April 18, 2016
As the resolution of optical encoders increases, the distance from sensor to disk decreases. In the incremental encoder industry, this distance is called the “Air Gap”. In the side view photo of an optical encoder above, the two red lines indicate the air gap between the sensor and disk in...
May 13, 2013
April 8, 2013
. In Optical Encoders, the item most affected by temperature is the output of the Light source. In most cases this is an LED. Below is a graph of the relative light output of the light source measured as photocell current on an optical encoder over temperature. You can see...
March 2, 2013
Encoder Electrical Structure The internal electrical structure of the QDI series of encoders consists of a photo interrupted light source that is picked up by a common mode photo detector array. “Common mode” means that there are two channels that are at exact opposite states in any position. The advantage...
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