Re: Laser Distance Measure

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

>
> Sure. You want to talk to Renishaw about laser interferometers. Keep
> hand on wallet
> when you talk to them. VERY expensive. This is quite a bit more
> accurate than what
> you are asking for, but I'm not sure there is anything in between, if
> you want to
> measure across a clear space. If you can use a linear beam, then
> Heidenhain, Sony
> and a few others have magnetic and optical tape scales that can do this
> very well
> for under $1000. There is a tape that is applied to a beam that you
> supply, and a
> read head, somewhat like on a DRO scale, that traverses the beam.
>
> Jon
>

Bare in mind that an interferometer will require you to place the
reflector at a known distance and then move it out to the measured
distance all the while keeping alignment. This could be tricky
without long rails etc and if you have a long rail you might as well
add an encoder strip.

Graham