63e07fca   
   From: rlombardo3@gmail.com   
      
   The automotive thermal camera is used for pedestrian detection, so the   
   temperature deltas are usually in the few degree range.  Although the NEdTs   
   for the microbolometers are significantly lower than the target people.   
      
   There are, of course, instances when the background may be a building or   
   other radiantly heated source, so FLIR sensitivity is always a concern --   
   especially during thermal transition times -- at dawn and dusk.   
      
    - Russ   
      
   "Helpful person"  wrote in message   
   news:5f992d20-9df7-484c-b452-6900c087e77b@ri8g2000pbc.googlegroups.com...   
   On May 7, 3:19 pm, "rll_sb"  wrote:   
   > All this theory is interesting, but I am relying on practice. I was the   
   > Sr.   
   > Scientist at Autoliv, using FLIR microbolometers in our automotive   
   > cameras.   
   > We used no additional aperture stop at all. We simply used the natural   
   > stop   
   > from the lens itself and never had any problems whatsoever with   
   > temperature   
   > issues.   
   >   
   > Stops would simply add cost and in high-volume manufacturing, they were   
   > simply eliminated and there was no issue without them. We did optical   
   > analysis and tried stops, but found no value. Fast optics was a much more   
   > useful science to improved performance in microbolometers.   
   >   
   > - Russ   
   >   
   > "Helpful person"  wrote in message   
   >   
   > news:60a3e0da-8eab-4b72-b411-36e7253a2e88@ot8g2000pbb.googlegroups.com...   
      
   What temperature differences were you trying to detect?   
      
   http://www.richardfisher.com   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)