Patent ID: 11940326
Assignee: YOKOGAWA ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A spectroscopic analysis device, comprising:
a film that contacts a sample subject to spectroscopic analysis;
an optical waveguide that transmits a first irradiation light having transition energy to decompose attached material attached to a boundary surface of the film, wherein a first evanescent wave, based on the first irradiation light, is generated on a front surface of the optical waveguide, and is then projected on an attached region of the attached material;
an irradiator that irradiates a second irradiation light on the film, wherein the second irradiation light generates a second evanescent wave that projects onto a region of the sample;
a detector that detects a measured light based on the second irradiation light irradiated by the second irradiator, wherein the measured light comprises information of an absorption spectrum of the sample;
a prism, which allows the second irradiation light and the measured light to pass through, disposed on a side opposite the film with respect to the optical waveguide; and
a filter disposed between the prism and the optical waveguide, wherein the filter has higher transmissivity with respect to the second irradiation light than transmissivity with respect to the first irradiation light.