Hi Sven,   
      
   I do this two ways: 1) Non-sequential mode, and 2)sequential mode. I think you   
   want to consider non-sequential.    
      
   1) For non-sequential mode: I do this trick... that is not perfect but close   
   enough. I use the "source diode" and let the VCSEL be described as an array of   
   square emitters without astigmatism. Input the FWHM per the ZEMAX manual...   
   this works well.   
      
   2) For sequential mode: I solve for the embedded gaussian beam and M^2 per   
   Siegman to get the basic propagation characteristics.    
      
   1) is better for imaging etc. you can see the array on the detector.    
   2) is better for propagating the total beam as a single beam... IE. for   
   free-space illumination.   
      
   Regards and greetings from Seattle...    
      
   Parry Johnson   
      
      
      
      
   On Monday, October 1, 2001 2:30:37 AM UTC-7, Sven Voigt wrote:   
   > Hello world!   
   >    
   > I am trying to design an optical system that uses a VCSEL array as   
   > light source.  As I am yet very new to ZEMAX I couldn't find an   
   > apporpriate way of simulating VCSELs. The problem is their flat   
   > extension with a given cone angle.   
   >    
   > Having tried the field feature and NSC, nothing satisfied our needs.   
   > The NSC Source Ellipse in particular has no angle limitation.   
   >    
   > If anybody could please hint me to any web source or show up with a   
   > ZEMAX solution, I'd be very thankful! :-)   
   >    
   > Many greetings from Germany...   
   >    
   > Sven Voigt   
   >    
   > Institut für Mikrotechnik Mainz GmbH, Optik   
   > Carl-Zeiss-Strasse 18-20, 55129 Mainz   
   > Telefon: 06131/990-160, http://www.imm-mainz.de   
      
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