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Thread: "Lasers again" distance measurement
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face BY : David VanHorn email (remove spam text)



At 08:51 AM 2/4/01 +0530, Jeethu Rao wrote:
>Well Sid,
>     Can you please tell me how can the phase of a beam be determined ? I
>know the phase of radio signals can be detected. But I don't know of a
>method to find out the phase of a light beam.

You simply mix the received light with the transmitted light.
Dark means out of phase, bright means in-phase.

It's used for sensitive distance measurement.
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Subject (change) "Lasers again" distance measurement

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