I'd think a resolution of about 1/8" should be fine, but 1/4" should=20
serve the purpose also.
I want to scan a 4" x 4" area to map the height of the cookie (which=20
should be a 3.5" circle).

I was thinking I could darken the area, then use a fine light (laser=20
pointer perhaps) at an angle and have a small camera at an angle detect=20
it.  I can calculate height from the location of the spot on the image. =20
Then I'd scan that across the whole area.

Cheers,
-Neil.


On 8/31/2015 11:52 PM, James Cameron wrote:
> What diameter of the spot being tested?
>
> It would be easy to estimate the distance with an infrared proximity
> sensor, but the spot size may be much larger than you want.
>

--=20
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