Instruments and Experimental Techniques

, Volume 53, Issue 4, pp 549–552 | Cite as

Investigation of spectral resolution in a Czerny Turner spectrograph

  • H. Mohammadi
  • E. Eslami
General Experimental Technique


This article describes a smiple and low-cost Czerny-Turner spectrograph capable to operate in spectral range from approximately 350–900 nm. A sine drive assembly was used for linearizing the wavelength scale. The wavelength and pixel position calibration problem have been solved using light sources with known wavelength emission lines, and a polynomial fitting method to find the relationship between diffraction wave-lengths and pixel numbers. The pixel resolution ∼0.015 nm/pixels and FWHM ∼0.1 nm at 170 μm entrance slit width are sophisticated enough to serve well in a research laboratory, yet is simple and inexpensive enough to be affordable for educational use.


Astigmatism Pixel Resolution Entrance Slit Exit Slit Wavelength Scale 
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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • H. Mohammadi
    • 1
  • E. Eslami
    • 1
  1. 1.Department of PhysicsIran University of Science and Technology NarmakTehranIran

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