From: boxman@voyager.net   
      
   On 10/12/2013 2:32 PM, sgoptics wrote:   
   > I'd like to cement a hi intensity LED to a PMMA lens.   
   > Any tips about prefered adhesive, that will not melt/burn/conteminate the   
   LED ?   
   > Will it be helpful to put a thin slab of glass between the LED and the lens?   
   > Will chloroform do the job ?   
   >   
   > TIA   
   >   
   > Shay Ghilai   
   > sgoptics@netvision.net.il   
   >   
      
   Hard to answer without knowing specifics of your LED.  Most LEDs have a   
   silicone dome which reacts badly to aromatic hydrocarbons, examples of   
   which are superglue and Formaldehyde or butadiene (e.g. PLIOBOND   
   adhesive).   
      
   Cree has fairly extensive chemical compatibility information for their   
   x-lamp leds listed on their website under the documentation tab for each   
   type of LED.  If you are not using a Cree LED, it's most likely similar   
   to Cree's construction if it is high output, so the Cree information is   
   likely valid.   
      
   Norland Optical Adhesives manufactures a wide range of adhesives that   
   may be compatible with your application.  You might try contacting them   
   with your specifics to see if they can recommend something.   
   http://www.norlandprod.com/adhesiveindex2.html   
      
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