Homebrew PCBs

> The whole thing will be made from MDF or plywood,
> not sure if i should try  
> to seal the dust out or just keep everything open so
> i can easily remove  
> the dust.. also, the lens should be mounted in a way
> that allows to adjust  
> it, not sure what i will do there..
> 
> 
> Well, i'll let you know what i come up with.
> 
> ST
> 
Another possibility is to put a slightly higher
pressure within the optical train. Just make sure its
clean air. You can put vent holes near the exposed
surface of the lens as well. However, getting the
hole's correct can be tricky...  We built a optical
system for a saw mill blade years ago, and it stayed
pretty cleaned compared to everything else in the
vicinity.

For what you are doing, the thin lens equations should
work fine, as you don't need to be too concerned with
off axis distortions, or even chromatic distortion of
the image.

Ron


		
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