From: jeedom74000@gmail.com   
      
   On Sunday, February 12, 2023 at 11:53:55 PM UTC+1, Henry Nebrensky wrote:   
   > On Thursday, 9 February 2023 at 07:48:59 UTC, HoloLab wrote:    
   > > In both cases I don't quite see why it is much more complicated to   
   introduce    
   > > a (low frequency) carrier frequency in the optical setup by means of an   
   additional    
   > > mirror on a transducer in order to improve the "reactivity" of the loop to   
   some    
   > > external vibration as suggested above but I might be missing something.   
   > IME "introducing" something where it wouldn't have been otherwise will   
   always be "more    
   > complicated" than not doing so; the issue is whether the extra complication   
   is worth it.    
   >    
   > Are you actually limited by vibration problems?    
      
   Not really but I am currently working with photopolymer films which are very   
   slow, potentially yielding long exposure times, which increase the chance of a   
   random phase shift and slow thermal drifts. So I am putting a bit of energy on   
   the fringe-locking    
   topic :)   
      
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