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Message ID: 1862     Entry time: Fri Aug 7 17:51:50 2009
Author: Zach 
Type: Update 
Category: Cameras 
Subject: CMOS vs. CCD 

The images that I just posted were taken with the CMOS camera.  We switched from the CCD to the CMOS because the CCD was exhibiting much higher blooming effects.  Unlike the CCD, there is a slight background structure if you look carefully in the amplitude image, but I can correct for this consistent background by taking a uniformly exposed image by placing a convex lens in front of the CMOS.  I will then divide each frame taken of the laser wavefront by the background image. 

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