- Changchun Rongde Optics
- Co.,Ltd.
- Add：No.1666 Yaan Road,
- North Lake Development District,
- Changchun 130102,China
- Tel：86-431-81881745
- Fax：86-0431-85256892
- E-mail：rongdecui@roundss.net
- Skype：adacui_roundss
Company News
Current position ：Home > News > Photoelectric Sense
Understanding how optical encoders work！
Changchun Rongde Optics Co.,Ltd. Release time：2016/8/27 Browse：688Understanding how optical encoders work, especially rotary encoders, can help you eliminate (and understand) encoder problems on your drilling rigs.
First, the basics:
Nearly all optical encoders work in fundamentally the same way. A LED (usually infrared) shines through an encoding disk with lines which interrupt the beam of light to a photosensor. (A rare few bounce the light off an reflective encoder disk with light/dark areas instead of passing the light through, but the other encoder principles are identical).
But it's not quite as simple as passing a beam through a encoder disk in the real world and getting a square wave train of pulses output.
LED light beams diverge, or spread out, so this would make multipler "fuzzy" shadows on the optical encoder sensor. What the encoder sensor wants to see is clear on/off changes when the lines pass in front of the encoder LED beam. To begin to solve this problem, encoder manufacturers add lenses over the LED. This makes the light beams nearly parallel.
Previous：Roundss 8Led digital display DRO connect with linear scale Next：Roundss linear sensor digital signal encoder sino linear scale
Products