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      https://www.ias.ac.in/article/fulltext/pram/077/04/0627-0631

    • Keywords

       

      Birefringent plate; achromatic retarder; near infrared.

    • Abstract

       

      Phase retarders normally show strong wavelength dependence. Achromatic retarders which exhibit nearly identical characteristics over a wide wavelength spectrum is used in polychromatic light. The present investigation deals with a technique to design and study the characteristics of an achromatic combination of birefringent plates in 800–2000 nm range. The retarder has been designed using calcite, crystalline quartz and ADP. The thicknesses of the plates are 19.38 𝜇m, 446.14 𝜇m and 12.57 𝜇m respectively. The new arrangement of three birefringent plates proposed has the promise of producing a zero-order quarter wave achromatic combination with fairly good accuracy.

    • Author Affiliations

       

      Arijit Saha1 Kallol Bhattacharya2 Ajoy Kumar Chakraborty2

      1. Department of Electronics & Communication Engineering, B.P. Poddar Institute of Management & Technology, 137, VIP Road, Kolkata 700 052, India
      2. Department of Applied Optics and Photonics, Calcutta University, 92, A.P.C. Road, Kolkata 700 009, India
    • Dates

       
  • Pramana – Journal of Physics | News

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