Laser continuous analysis of metal and insulator in fluidized state

Abstract

Abstract PURPOSE:To improve the analytical precision by setting the distance between a condenser lens and a molten material and the focal distance of the condenser lens to a prescribed relation in spectroscopic analysis of an emission spectrum obtained by irradiating laser light to the molten material to be measured in fluidized state. CONSTITUTION:The laser light emitted from a laser oscillator 1 is bent downward by a prism 2, and condensed at the surface of the molten material 4 to be measured in fluidized state by the condenser lens 3. The emission spectrum generated by the irradiation is introduced to a spectrometer 10 by a light introducing system consisting of a concave mirror 8, plane mirrors 9a, 9b. To prevent an intensity variation of the emission spectrum due to up-and-down movement of the material 4, the distance l between the lens 3 and the surface of the material 4 is regulated to 0.95f<=l<=1.05f with respect to the focal distance (f) of the lens 3. The stable analyzed value can be obtained independently of the up-and-down movement of said molten material.

Inventors

• 👤 Kozo Sumiyama
• 👤 角山　浩三
• 👤 Wataru Tanimoto
• 👤 亘 谷本
• 👤 Zenji Ohashi
• 👤 大橋　善治
• 👤 Shigeyuki Kimura
• 👤 木村　茂行
• 👤 Fumio Asakawa
• 👤 浅川　文夫

Bibliographic Details