User:Pranav Rathi/Notebook/OT/2010/03/03

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Today 03/05/10 I did a quick experiment to measure that how much intensity we might have to cut down to snap the beam profile without saturating ccd. It turned out to be roughly 1e-7W, if input is 1W. Later I explored the possibility of using multiple reflections to cut down the intensity. It turned out that 1 plane glass strip cut down the intensity 10%. So 7 consecutively reflection will cut down the intensity up to roughly 1e-7. BUT each reflections contain 2 reflections out of two surfaces (I used 1mm thick), so total 14 REFLECTIONS. If use just an ultra thin may be a glass membrane carefully with one or two NDs than this can be done and beam profile might still be preserved. Still working……  
Today 03/05/10 I did a quick experiment to measure that how much intensity we might have to cut down to snap the beam profile without saturating ccd. It turned out to be roughly 1e-7W, if input is 1W. Later I explored the possibility of using multiple reflections to cut down the intensity. It turned out that 1 plane glass strip cut down the intensity 10%. So 7 consecutively reflection will cut down the intensity up to roughly 1e-7. BUT each reflections contain 2 reflections out of two surfaces (I used 1mm thick), so total 14 REFLECTIONS. If use just an ultra thin may be a glass membrane carefully with one or two NDs than this can be done and beam profile might still be preserved. Still working……  
I emailed Mr. Gunn on 03/04/10, about profiling the beam at higher powers, and waiting for his reply.  
I emailed Mr. Gunn on 03/04/10, about profiling the beam at higher powers, and waiting for his reply.  
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[[Category: Gernal Notes]]
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[[Category:Optical Tweezer]]

Revision as of 16:15, 5 May 2010

Today 03/05/10 I did a quick experiment to measure that how much intensity we might have to cut down to snap the beam profile without saturating ccd. It turned out to be roughly 1e-7W, if input is 1W. Later I explored the possibility of using multiple reflections to cut down the intensity. It turned out that 1 plane glass strip cut down the intensity 10%. So 7 consecutively reflection will cut down the intensity up to roughly 1e-7. BUT each reflections contain 2 reflections out of two surfaces (I used 1mm thick), so total 14 REFLECTIONS. If use just an ultra thin may be a glass membrane carefully with one or two NDs than this can be done and beam profile might still be preserved. Still working……

I emailed Mr. Gunn on 03/04/10, about profiling the beam at higher powers, and waiting for his reply.

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