Re:Laser links?

[That's a very interesting little device there! I can see it mounted in the
spindle of a CNC mill or router, being used instead of a Renishaw-type probe
to digitize things. The .002" accuracy they clain is as good as any
digitizer on the market. All it would take to make one of these into
digitizer, it seems to me, is a probing/point-collecting program that could
deal with its output (24v, according to the pdf) and a box to interface it
with the machine, moving it around as needed. Any idea how much they cost?]

Andrew Werby
www.computersculpture.com


Rab "rainnea" <rainnea@...> wrote:
Subject: Re:Laser links?

Hi Andrew,

Thanks for the link, I was thinking something a bit simpler using
single point triangulation

This discription comes from:
http://www.idec.com/usa/html/Sensors_MX1C.html
"The sensor head projects a laser beam to the object. The diffuse-
reflected light from the object's surface is received as a spot
image. This spot image moves from position A to B on the PSD
(position sensitive device). The optical triangle is used to compute
the exact distance between the sensor and the object."

There's a diagram on page 2 of:
http://www.woojoohitech.com/product/pdf/MEL/m5all-spec.pdf

It looks like the main component needed would be the PSD (position
sensitive device).

Before looking into this I'd thought that laser distance sensors
would work by measuring the time it takes for a pulse of light to
return to the sensor although I suppose that this actual time must be
minute and difficult to measure accurately,

Regards,

Rab

>
> [I'm not sure if this is what you're talking about or not, but the

Immersion

> Lightscribe system allows you to "paint" areas shadowed in the

basic scan by

> scribbling around with a laser pointer. See
> http://www.immersion.com/products/3d/capture/lscomparison.shtml ]
>
> Andrew Werby
> www.computersculpture.com