- #1
blin1994
- 1
- 0
Hi,
My question is how do do laser interferometers measure distances of more than one wavelength?
I know they rely on phase difference to calculate distances but phases only differ at 180 degrees at max so how do interferometers factor in going over 180 degrees in phase difference to calculate larger distances?
Thanks
My question is how do do laser interferometers measure distances of more than one wavelength?
I know they rely on phase difference to calculate distances but phases only differ at 180 degrees at max so how do interferometers factor in going over 180 degrees in phase difference to calculate larger distances?
Thanks