From: wwm@wwmartin.net   
      
   On 05/11/2012 01:57 PM, Salmon Egg wrote:   
   > In article, Bill Martin   
   > wrote:   
   >   
   >> Hi,   
   >>   
   >> Anyone know where I can find data on spectral reflectance of metal   
   >> alloy, specifically typical "solder" tin-lead alloy? I'm looking for a   
   >> wavelength that is not reflected strongly, if such a thing exists.   
   >>   
   >> Thanks,   
   >> Bill M   
   >   
   > There is an old engineering adage, "Good enough is perfect." Specify   
   > what is good enough?   
   >   
   Ok, what I had in mind was a graph of wavelength vs reflectance for   
   tin-lead alloy in solder. What graphs I have seen for tin, for example,   
   are kind of "lumpy", meaning there could be more than one wavelength   
   that would be "good enough". At this stage of the game, I really only   
   need to know if there is "any" sense in pursuing the idea of soldering   
   with a laser. The wavelength makes a difference in price, right?   
   So, for starters, can I get better than 50% power transfer?   
      
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