Kawasaki Steel Corporation

Japan Spectroscopic Co., Ltd.

Spectral Instrument Co.

Yoshiharu Ohashi

Kouzou Tsunoyama

Toshio Irie

Toshio Ichida

Hajime Ogata

Shunichi Tsugawa

Wataru Tanimoto

Motoyuki Konishi

Yasuko Furunushi

Shigeyuki Kimura

Fumio Asakawa

In a method of laser emission spectroscopical analysis, wherein a light emitted from the surface of a sample when a laser beam is irradiated onto the surface of the sample is spectroscopically analyzed, an emission mode of the laser beam is fixed to a gauss distribution type TEM.sub.00 mode to avoid variations in an intensity distribution due to a change in mode, and an analyzed value is obtained from an intensity of a spectral line of an element to be measured when an intensity of a preset spectral line or an intensity ratio between a pair of preset spectral lines is within a predetermined range, so that the influence of wide fluctuations in an evaporation and an excitation processes occurring on the surface of the sample can be eliminated, thereby improving the accuracy of analysis.

Method of laser emission spectroscopical analysis and apparatus therefor

A focusing lens having a focal length f is provided at a position spaced a distance L apart from a substance to be measured in the fluid state, the relationship between L and f is controlled, so that the formula:

Method of performing continuous on-line laser emission spectroscopic

Tin-free steel sheets having improved lacquer adhesion

Growing community of inventors

Setagaya, Japan

Yoshiharu Ohashi