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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 26 — Sep. 10, 2010
  • pp: 5001–5004

Circular multireflection cell for optical spectroscopy

Johannes Ofner, Heinz-Ulrich Krüger, and Cornelius Zetzsch  »View Author Affiliations

Applied Optics, Vol. 49, Issue 26, pp. 5001-5004 (2010)

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We constructed a circular multireflection (CMR) cell, allowing multireflection around the center of the cell. This is caused by a skewed adjustment of the entering beam (equivalent to a simple parallel shift/offset), avoiding the center of the cell, thus leading to multiple reflections. The experimental setup with a cell with an inner diameter of 6 cm showed up to 17.5 beam passes on polished aluminum and attained path lengths up to 105 cm , demonstrated by Fourier transform infrared measurements of CO 2 gas between 2283 and 2400 cm 1 . The circular concept, i.e., the centering of the reflections, is useful for absorption spectroscopy on trace gases and aerosols. The optical alignment of the cell can completely be performed from outside the experimental setup, e.g., an aerosol flow reactor or a vacuum system. The variation of the path length is easily possible by adjusting the position of the cell with respect to the entering light beam.

© 2010 Optical Society of America

OCIS Codes
(120.5700) Instrumentation, measurement, and metrology : Reflection
(300.0300) Spectroscopy : Spectroscopy
(080.4035) Geometric optics : Mirror system design

ToC Category:

Original Manuscript: May 20, 2010
Manuscript Accepted: August 12, 2010
Published: September 9, 2010

Johannes Ofner, Heinz-Ulrich Krüger, and Cornelius Zetzsch, "Circular multireflection cell for optical spectroscopy," Appl. Opt. 49, 5001-5004 (2010)

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