1f27eab0   
   From: into@oblivion.nothing.com   
      
   Wade Kelman  wrote in news:3a686437-4934-4fab-   
   8b3e-7118e498ad6e@k7g2000yqj.googlegroups.com:   
      
   >   
   >> Well, it is a start. I don't know if the OP is just a hobbyist   
   >> looking for something simple, or someone more skilled who has   
   >> the ability to design a lens system.   
   >   
   >> For myself and my level of knowledge, I know it can be done.   
   >> I suspect to get the best performance would require at minimum   
   >> a two lens design, if not more. I'd probably go snag the free   
   >> version of Zemax and give myself a crash course on lens design,   
   >> and try to use stock lenses from a catalog like Edmund Sci or   
   >> other lens manufacturer. I'd also probably end up bugging everyone   
   >> here with a bunch of questions.   
   >>   
   >> Brian   
   >   
   > Hi, Brian.   
   > Are you sure there's a free version of Zemax?  I know there's a free   
   > version of OSLO.   
      
   Perhaps I'm misremembering.   
      
   > I actually have designed high resolution HUDs for the military with   
   > focal lengths around 2" and FOV's of +/-25 degrees, and I couldn't get   
   > decent imaging with off-the-shelf optics.   
      
   Well, that just goes to show what I know. But by trying to   
   design using off-the-shelf would show the limitations, and   
   thus teach.   
      
   In the end it's all up to the OP's needs and skills. And,   
   perhaps, how deep their pocket is.   
      
   Brian   
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