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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 13 — May. 1, 2012
  • pp: 2395–2399

Optical transmittance measurement system for coated elements with low transmittance

Hongyun Wang, Zhengshang Da, Lili Liu, and Juanning Zhao  »View Author Affiliations

Applied Optics, Vol. 51, Issue 13, pp. 2395-2399 (2012)

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The low-transmittance elements required for a high power laser facility have stringent specifications about transmittance. To validate optic performance against specifications, a metrology system for transmittance is proposed. The system is composed of a laser source, an integrating sphere, a power meter, and four uncoated wedged glasses. A relative measurement method is adopted, which is that the surface reflectivity of uncoated glass is used as the reference to compare with the sample’s transmittance. The systematic feature is that uncoated wedged glasses are applied to split and reflect beams, which not only avoid coating errors, but also make the two beam powers attenuate properly. Measurement results for a sample’s transmittance are presented. Experiment and analysis show that the relative standard uncertainty (σT/T) of measurement is 0.424%. This system is available for large-aperture elements.

© 2012 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(120.7000) Instrumentation, measurement, and metrology : Transmission

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 28, 2011
Revised Manuscript: February 16, 2012
Manuscript Accepted: March 1, 2012
Published: April 27, 2012

Hongyun Wang, Zhengshang Da, Lili Liu, and Juanning Zhao, "Optical transmittance measurement system for coated elements with low transmittance," Appl. Opt. 51, 2395-2399 (2012)

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