Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,550   Posts: 1,544,836   Online: 1059
      
Results 1 to 2 of 2
  1. #1
    Mustafa Umut Sarac's Avatar
    Join Date
    Oct 2006
    Location
    İstanbul - Türkiye
    Shooter
    35mm RF
    Posts
    3,840
    Images
    108

    Correcting lens with hologram

    I researched and learned that a hologram only good for single color , other colors diffract and distort the image if we use it as a lens . But at telescope correcting , they are puting a hologram between eye and the ocular to correct the image. If hologram is good for single color , why this is not same for telescope correcting.

    Best ,

    Mustafa Umut Sarac

  2. #2

    Join Date
    Aug 2006
    Shooter
    35mm RF
    Posts
    218
    The only thing of this nature that I've heard of is the use of computer designed systems using fourier analysis which act to attenuate a star without attenuating light in the immediate vicinity. This is for planetary detection and I suspect achromatic performance is less of a priority.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin