Homebrew PCBs

Never heard of an f-theta lens. I looked it up on google, but I do not see how that solves the problem unless you use a really big lens.


--- In Homebrew_PCBs@yahoogroups.com, Volkan Sahin <v_sahin@...> wrote:
>
> If you use f-theta lens in front  of rotating  mirror this solves the problem .
> 
> 
> --- On Tue, 11/24/09, javaguy11111 <javaguy11111@...> wrote:
> 
> From: javaguy11111 <javaguy11111@...>
> Subject: [Homebrew_PCBs] Re: Blue Laser LDI Dry Film Results
> To: Homebrew_PCBs@yahoogroups.com
> Date: Tuesday, November 24, 2009, 3:47 PM
> 
> 
>       
>       I would think using a mirror like that would cause  the sides of the exposed area to not be vertical.
> 
>