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Ask for Laser measurement distance method?

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amazonite

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Hello....
I have to use MPU to finish a project about laser measurement distance? But I can't know how to do? If you know it. Please tell me.
Thank you. :eek:
 

What is the range of distances that you have to measure?
 

Range is 1mm to 100m.
 

you can modulate laser diode with PRN sequence and then measure delay with correlator. similar as gps :)
 

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