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Does anyone know 'Interferogram Phase Correction'?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 06:11
kipi View Drop Down
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Hello!
I have a question regarding 'Interferogram Phase Correction'.
Does anyone can refer me to some info regarding the extraction of information after Michelson - interferogram - phase - correction? 
 
Thanks!! Smile
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 08:41
Dale Clifford View Drop Down
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what level?
basic knowledge
specific instrument
pretty broad question
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/24/2008 at 02:19
kipi View Drop Down
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I guess that the level is quite basic...

The instrument is 'Michelson interferometer'.

I performed a phase correction on the obtained spectrum and as a result got a symmetric interferogram (after the inverse fft).

I need some info regarding the use of the symmetric interferogram. Why is it so important to get the symmetry? what kind of info can I extract from this?

Since the spectrum remains unchanged (the changes in phase in the time-domain didn't change the data in the frequency-domain), what is the goal of 'zeroing' the phase?

Thank you very much for your response!

I hope I made my self clear enough.

All I need is some kind of article (or a reference to a book or some kind of reading material) regarding this. All I found was information regarding the execution if the phase error correction, and not regarding the next step.

Thanks again!.

 

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/24/2008 at 08:24
Dale Clifford View Drop Down
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http://www.princeton.edu/~mlittman/SPIE_formated.pdf
what are you measuring atmospheric, telecsopce abbreation, oceanic water vapor?
zero is necessary to provide a baseline for the measurement.
fft shifts to frequency- the data is manipulated, then the inverse which reconstructs the data with the convolution or takes it out (time-series) in signal processing one can keep both if you use Laplace or Wavelet transforms instead.
your specific use of "michelson" suggest astronomy-- rather than signal processing per se.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/24/2008 at 10:05
kipi View Drop Down
Optics GrassHopper
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Thank you very much for the article and your response mr.Dale. Smile

I'm testing the scattering from different materials for spectral imaging purposes.

(I guess that the final processing can be related to dsp...).

My goal is to get an accurate spectrum as possible from the same material in different tests.

(Does this help..?)
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/25/2008 at 20:50
trigger29 View Drop Down
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Originally posted by Dale Clifford Dale Clifford wrote:

http://www.princeton.edu/~mlittman/SPIE_formated.pdf
what are you measuring atmospheric, telecsopce abbreation, oceanic water vapor?
zero is necessary to provide a baseline for the measurement.
fft shifts to frequency- the data is manipulated, then the inverse which reconstructs the data with the convolution or takes it out (time-series) in signal processing one can keep both if you use Laplace or Wavelet transforms instead.
your specific use of "michelson" suggest astronomy-- rather than signal processing per se.
 
Yeah..........thats what I was gonna say.?  Or something like it.Wink
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