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  1. #1
    Ed Majden's Avatar
    Ed Majden Guest

    Default Dr. Paul's solar prominence filter????



    Does anyone know what happend to Dr. Henry Paul's solar prominence
    filter as described in the ATM series of books, Book Three, I think. It was
    made of a stack of quartz plates of various thicknesses. I wonder how this
    type of device compares to modern day interference filters? I believe this
    was called a Lyot Quartz Monochromator.



  2. #2
    David Knisely's Avatar
    David Knisely Guest

    Default Dr. Paul's solar prominence filter????

    Ed Majden posted:


    I don't know what happened to the unit he built, but there were undoubtedly
    others.


    They can be as broad or also as narrow as the Fabry-Perot Etalon-based filters
    used today. It depends on the number of elements you want to put in (the more
    elements, the narrower the passband generally is). It is a somewhat more
    complex design than the F-P filters, but if you can get access to the quality
    quartz (not an easy task BTW), as well as the interspaced polarizers, you
    could make one yourself. Clear skies to you.
    --
    David W. Knisely KA0CZC@navix.net
    Prairie Astronomy Club: http://www.prairieastronomyclub.org
    Hyde Memorial Observatory: http://www.hydeobservatory.info/

    **********************************************
    * Attend the 11th Annual NEBRASKA STAR PARTY *
    * July 18-23, 2004, Merritt Reservoir *
    * http://www.NebraskaStarParty.org *
    **********************************************



 

 

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