Quote:
Originally Posted by mjc
Thanks for posting that Richard
I have been curious for some time about the value of using polarization filters in astronomical imaging.
What sort of polarization filters do you use and how does one choose the angle of rotation? Do you use the Polarization filter pairs used for reducing lunar glare and remove one of the pair?
Mark C.
|
First off, you ought to read the paper I wrote and review the slideset because it speaks to what exactly I am doing and in reading your questions it appears to me that you may not be understanding the goals and methods very well.
Your questions actually relate more to a potential use to eliminate sky glare and so on. This is NOT what I am doing. I am seeking polarized objects and then showing how to detect the polarization and to use it for visualization of the polarization of the object by using color.
I am using LINEAR polarizing analyzers. For use in eliminating glare circular polarizers are commonly used in Terrestrial photography. That is a very different application that what I am doing.
So in summary I am detecting polarization rather than using polarizers to eliminate glare. The moon doesn't feature polarized light but getting its light through the atmosphere it may be beneficial to use a circular polarizing filter. I haven't tried it partly because I have little interest in lunar imaging.
What interests me is using filters on terra firma to help me see latent structure or features that are commonly missed in conventional imaging. It is a powerful tool for visualization and that is how I am using it.
Please read the paper and look over the slideset and see if your questions about angles and types are answered.....