High resolution multi-grating spectrometer controlled by an Arduino

Authors

  • Karl Haebler The University of British Columbia
  • Anson Lau University of Waterloo
  • Jackson Qiu University of Waterloo
  • Michal Bajcsy University of Waterloo

DOI:

https://doi.org/10.14288/cjur.v2i1.188916

Keywords:

aberrations, Arduino, diffraction grating, periscope, servo motor

Abstract

We present the design for a high resolution triple-grating Czerny-Turner spectrometer for visible and telecom wavelengths, together with results of optical simulations using ZEMAX. Results from the simulations show that one of the most important factors affecting spectral resolution is the focal length of mirrors. Increasing the focal length allows for a greater degree of spatial dispersion of light diffracted from the gratings and also reduces optical aberrations. Radiation of wavelengths around 1550 nm are shown to have very noticeable aberrations in certain designs, evident by a large degree of smudging. Using parabolic mirrors instead of spherical mirrors is demonstrated to have a negligible effect when compared with increasing focal length. The optical simulations and preliminary testing of mechanical components show that it is possible to build a cost effective high resolution Czerny-Turner spectrometer using off the shelf components.

References

T. Heinz, “Rayleigh Scattering Spectroscopy”, Topics in App Phys, vol. 111, pp. 353-369, 2008

H. Butler et al, “Using Raman spectroscopy to characterize biological materials”, Nature, vol 11, pp. 664-687, March 2016

Downloads

Published

2017-01-12

Issue

Vol. 2 No. 1 (2017): CJUR 2(1)

Section

Articles

License


Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).