PROBLEM TO BE SOLVED: To reduce noise of backscattering light in a Raman spectroscopic analyzer which irradiates a sample with excitation light via a sample chamber window to detect backscattering light from the sample.;SOLUTION: A Raman spectroscopic analysis method includes: a step of reflecting an excitation luminous flux by a reflection mirror 104 and causing reflected light to perpendicularly pass a sample chamber window 107 and condensing the reflected light at a prescribed measurement point P in a sample chamber 106 to irradiate a sample at the measurement point P; and a step of causing Raman scattering light which is emitted backward from the sample and passes the sample chamber window 107 and is scattered around the reflection mirror 104, to impinge on a detection system 109 by a lens 108 with the measurement point P as a focus. Further, the Raman spectroscopic analysis method includes a step of reducing the amount of light from a mirror image point Q of the measurement point P with a surface of the sample chamber window 107 as a mirror surface, which impinges on the detection system 109.;COPYRIGHT: (C)2016,JPO&INPIT
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