From: hwabnig@.-   
      
   On Sun, 16 Sep 2012 16:43:31 +0800, Mathias K?rber   
    wrote:   
      
   >Hi.   
   >   
   >I have a webcam with 'IR' mode, which also has 'IR' illuminating LEDs   
   >for nightvision. However, those are still quite visible red. I would   
   >like to block the visible portion to make them invisible.   
   >   
   >Replacing the LEDs with real IR (I have a few TSHA5502 lying around)   
   >ones might be possible, but if possible I'd like to avoid having to open   
   >this device if possible...   
   >   
   >I read some suggestions that unexposed/developed slide film makes for a   
   >good filter, so I got one Fuji Velvia 100, but still does not markedly   
   >affect the visible red spectrum.   
   >   
   >Another suggestion was a few layers of Lee Congo Blue #181 and Primary   
   >Red #106 filters, but that too does not block the visible portion.   
   >   
   >Would anyone have any other suggestions? I would love to avoid paying   
   >for really expensive filters...   
   >   
   >any tips are appreciated..   
      
   Replace the LEDs.   
      
   Check your TV remote control: you don't see anything.   
   Look at it with a digital photo camera: perfectly visible.   
      
   w.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)