Practicability of absorption measurements according to ISO/DIS 11551

Bernhard Steiger; Ute Pfeifer; Peter Meja; Ulrike Broulik; Volker Neumann

doi:10.1117/12.259935

20 November 1996 Practicability of absorption measurements according to ISO/DIS 11551

Bernhard Steiger, Ute Pfeifer, Peter Meja, Ulrike Broulik, Volker Neumann

Proceedings Volume 2870, Third International Workshop on Laser Beam and Optics Characterization; (1996) https://doi.org/10.1117/12.259935
Event: Third International Workshop on Laser Beam and Optics Characterization, 1996, Quebec City, Canada

Abstract

We present significant differences in absorption measurements at the wavelength 10.6 micrometer and in the near infrared or UV region. This behavior is due to the different materials and their thermal properties. Zinc selenide and copper optics and optics made of various salts have been investigated at 10.6 micrometer. In these cases negligible problems with the measurement and evaluation procedures were observed. At the other wavelengths of 1.06 micrometer and 248 nm the measurements were carried out on BK7 or silica substrates. The evaluation corresponding to the ISO/DIS 11551 was not clear. One reason for this behavior is the low thermal wave velocity, so that the signal will arrive with long delay at the detectors. Furthermore the spatial and the temporal temperature profiles depend on the substrate material and sample geometry our measurements and computer simulations show the influence of the temperature conductivity of the substrate material, the sample thickness and diameter and the distance between the sensors and the laser irradiated area on the obligatory calibration factor.

Citation Download Citation

Bernhard Steiger, Ute Pfeifer, Peter Meja, Ulrike Broulik, and Volker Neumann "Practicability of absorption measurements according to ISO/DIS 11551", Proc. SPIE 2870, Third International Workshop on Laser Beam and Optics Characterization, (20 November 1996); https://doi.org/10.1117/12.259935

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