Hi all, I've got a problem about the working principle of transmissive optical encoder.
Please refer to the attached image.
As you can see, in the situation like the image, the amount of light that each photodiode of the pair for each channel receives is equal, so both output signals are at low logic level.
If we continue to move the encoder so that the photodiode B(+) stays within the window while the photodiode B(-) is still within the bar. Therefore the output signal on channel B switches to high logic level because the photodiode B(+) gets more light from emitter than the photodiode B(-).
In case we remain this situation unchanged for a long time (a few minutes for example), the output signal at channel B is still high level. Is that right ?
Hope you light me up. Thanks.
Please refer to the attached image.
As you can see, in the situation like the image, the amount of light that each photodiode of the pair for each channel receives is equal, so both output signals are at low logic level.
If we continue to move the encoder so that the photodiode B(+) stays within the window while the photodiode B(-) is still within the bar. Therefore the output signal on channel B switches to high logic level because the photodiode B(+) gets more light from emitter than the photodiode B(-).
In case we remain this situation unchanged for a long time (a few minutes for example), the output signal at channel B is still high level. Is that right ?
Hope you light me up. Thanks.
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