- #1

Cliff_J

Science Advisor

- 789

- 7

## Main Question or Discussion Point

How would go about measuring distance with a laser?

I'd like to construct a zero-contact method of measuring distance much like the commercial units designed to allow digitizing of a model as a retrofit on a 3-axis CNC. My understanding is that they position the X-Y and then determine the Z for each point. I figure with an inexpensive consumer laser and something like a PIC microprocessor I might construct a low-budget form of this.

I remember a physics lab where we measured the velocity of a moving sled using a laser, IIRC we just measured the doppler so no help in this application. So a pulse of the laser and determining the time to return much like SONAR seems plausible.

Am I in way over my head?

Thanks in advance.

Cliff

I'd like to construct a zero-contact method of measuring distance much like the commercial units designed to allow digitizing of a model as a retrofit on a 3-axis CNC. My understanding is that they position the X-Y and then determine the Z for each point. I figure with an inexpensive consumer laser and something like a PIC microprocessor I might construct a low-budget form of this.

I remember a physics lab where we measured the velocity of a moving sled using a laser, IIRC we just measured the doppler so no help in this application. So a pulse of the laser and determining the time to return much like SONAR seems plausible.

Am I in way over my head?

Thanks in advance.

Cliff