Patent ID: 6630991
Filing Date: 2003-10-07
Classification: G01J,H01L

Abstract:
A method of detecting a temperature of an object in a multiple-reflection environment by way of a radiation pyrometer, comprising the steps of:detecting a radiation strength emitted from a target region of said object; applying a correction term to said radiation strength so as to compensate for the effect of multiple reflections of a radiation emitted from said object; applying a correction term to said radiation strength so as to compensate for a reflection loss caused at an end surface of an optical medium interposed between said object and said sensing head; applying a correction term to said radiation strength so as to compensate for an optical absorption loss caused in said optical medium; and applying a correction term to said radiation strength so as to compensate for a stray radiation coming in to said sensing head from a source other than said target region of said object.