Mesure de la reflectance de miroirs metalliques dans l'infrarouge

Journal Article · Wed Feb 15 04:00:00 EST 1989 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.28.000665· OSTI ID:6415035

Mouchart, J

The performance of high power CO/sub 2/ lasers depends directly on the quality of the metallic mirrors used. The mirrors are therefore the key elements of these lasers and must have a reflectance as near as possible to unity. Thus, we have to characterize these mirrors precisely, that is to say, to use suitable measurement methods to determine their optical properties with enough accuracy. In this paper we describe a reflectance measurement system based on the use of a classical spectrophotometer. This method gives relative measurements, but with the help of a known standard reflectance, we can obtain the absolute value. Experimental results show that the accuracy is approx.1--2.5 x 10/sup -4/ provided that many measurements are made and precautions are taken. We propose here to study these conditions and in particular to give the reflectances of metallic mirrors at 10.6 ..mu..m.

• Research Organization: Laboratoires de Marcoussis, Centre de Recherches de la Compagnie Generale d'Electricite, Route de Nozay, 91460 Marcoussis, France
• OSTI ID: 6415035
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 28:4; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CARBON DIOXIDE LASERS
CONTROL
DESIGN
ELECTROMAGNETIC RADIATION
ELEMENTS
GAS LASERS
INFRARED RADIATION
LASER MIRRORS
LASERS
METALS
MIRRORS
OPTICAL PROPERTIES
PERFORMANCE
PHYSICAL PROPERTIES
QUALITY CONTROL
RADIATIONS
SPECTRAL REFLECTANCE