Homebrew PCBs

The lenses in any webcam should be capable of focussing close 
enough, but it is a case of getting enough physical adjustment. You 
will need to move the lens away from the sensor array.

I have been using cameras for close up wrk, but I run a conventional 
composite video board camera through a digitiser board.

The principle is the same tho

Chris

The principle is the same though...  lens further away--- In 
Homebrew_PCBs@yahoogroups.com, "James Newton" 
<jamesmichaelnewton@y...> wrote:
>
> --- In Homebrew_PCBs@yahoogroups.com, Alan King <alan@n...> wrote:
> >   But, I do have plans to focus one of my webcams in very close, 
> put it 
> > right next to the bit, and move up and down.  640 pixels from 
1/4" 
> away 
> > and move the bit up and down should detect if there is any off 
> angle a 
> > little better than using a normal visual method, should get it 
> very 
> > close to perfect on one pass.
> 
> 
> If you find a web cam that can do that or figure out how to adapt 
> one, please let me know. I can't get any of the 4 I own to focust 
> closer than about a foot and a half away. I've looked for close up 
> lenses, but all I can find are for the higher end cameras.
> 
> Having the ability to do close up with a web cam is the first step 
> in machine vision automation on the hobby level. The software is 
> becomming available, the only real cost at this point is the high 
> end cameras you have to buy.
>