• Holographic grating based Ebert spectrograph

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      https://www.ias.ac.in/article/fulltext/pram/029/02/0167-0182

    • Keywords

       

      Ebert spectrograph; holographic grating; aberration; interference fringes

    • Abstract

       

      In this paper we discuss the aberration properties and design procedure of in-plane Ebert spectrograph using conventional as well as holographic diffraction gratings. In both cases the gratings are situated at the well-known √3-position so that the spectrum can be recorded on a flat surface. It has been found that the holographic grating system has better resolution than the conventional grating system. The design parameters of a medium sized holographic grating spectrograph in which a concave spherical mirror is mounted in the off-axis configuration have been specified. The performance of the spectrograph has been evaluated by plotting spot diagram.

    • Author Affiliations

       

      N C Das1 M V R K Murty1 2

      1. Spectroscopy Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
      2. Physics Department, Alabama Agricultural and Mechanical University, Alabama - 35762, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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