Laser pulse transient method for measuring the normal spectral emissivity of samples with arbitrary surface quality
Jeromen, Andrej (Author), Grabec, Igor (Author), Govekar, Edvard (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1007/s00339-008-4601-4 This link opens in a new window

A laser pulse transient method for measuring normal spectral emissivity is described. In this method, a laser pulse (l=1064 nm) irradiates the top surface of a flat specimen. A two-dimensional temperature response of the bottom surface is measured with a calibrated thermographic camera. By solving an axisymmetric boundary value heat conduction problem, the normal spectral emissivity at 1064 nm is determined by using an iterative nonlinear least-squares estimation procedure. The method can be applied to arbitrary sample surface quality. The method is tested on a nickel specimen and used to determine the normal spectral emissivity of AISI 304 stainless steel. The expanded combined uncertainty of the method has been estimated to be 18%.

Keywords:kakovost površin, meritve emisivnosti, pulzni laserji, eksperimentalne metode, nerjavno jeklo, surface quality, spectral emissivity, measuring, laser pulse method
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 945-949
Numbering:Letn. 92, št. 4
ISSN on article:0947-8396
COBISS.SI-ID:10609691 Link is opened in a new window
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Record is a part of a journal

Title:Applied physics
Shortened title:Appl. phys., A, Mater. sci. process.
COBISS.SI-ID:14196007 This link opens in a new window

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