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   sci.optics      Discussion relating to the science of op      12,750 messages   

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   Message 11,846 of 12,750   
   ggherold@gmail.com to sgpopt...@gmail.com   
   Re: Camera Lens Optical Adjustment   
   01 May 14 09:33:16   
   
   On Thursday, May 1, 2014 6:34:51 AM UTC-4, sgpopt...@gmail.com wrote:   
   > Hi Folks,   
   >    
   > I am having trouble in manufacturing with my project. I have a camera   
   mounted with an M12 lens but I see large variation in lens tilt so I have to   
   come up with an adjustment method fairly soon.   
   >    
   > This is our first camera module, so please be kind with your comments :)   
   >    
   > - I inspected the modules built and CMOS is placed correctly with a worst   
   case error of 10u, (estimated under microscope) so trying to control in   
   production is not going to yield a lot of success.   
   >    
   > - I measure tilt of the camera using in house software and I see that we   
   need a way to adjust lens to the camera sensor so that we can get perfect   
   focus and achieve better MTF. The idea is to replace my current M12 holder   
   with a custom designed holder    
   which gives me some capability to automate this process in production and   
   adjust.    
   >    
   >    
   > I looked around and I couldn't find a single M12 (S Mount) holder that gives   
   me this type of capability. I would have thought, people run into this problem   
   and end up developing holders with this capability, but I couldn't locate one.   
   I would    
   appreciate ideas how to deal with this.   
      
   First I know almost nothing about what you are doing.  Most of the time I just   
   use lens on a bread board to focus light or make images. I do use a lens tube   
   for a diode laser, that has a very "tweaky" lens adjustment.. but I can only   
   move it along the Z-   
   axis (the direction of the light.)    
      
   Next some questions:  So it's the angular orientation of the lens/CCD that is   
   in error?  As opposed to a translation error. (motion along the X,Y or Z   
   axis)  (I assume that is your 10u comment.. and that 10u is 10 um (microns).)     
      
   So if it was me I'd first try and figure out where the angular mismatch is   
   coming from.  Is it the lens?  Does every lens cause the same misalgnment?   
   Is it the lens holder?  (again try different holders.) Is it the mounting of   
   the lens in the holder?  (remount and test again.) Or is it the connection   
   between the lens holder and CCD piece.     
      
   George H.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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