Title:
屈折率測定装置及び屈折率測定方法
Document Type and Number:
Japanese Patent JP6801893
Kind Code:
B2
Abstract:
In the present invention, an LED (3) emits light that includes a plurality of linearly-polarized-light components having different polarization directions. The light from the LED (3) enters one end of a waveguide member (4) having an elongated column shape, is totally reflected by side surfaces (4Aa, 4Ab) of the waveguide member (4) having metallic thin film (4B) that produces surface plasmon resonance partially formed thereon, and is then emitted from the other end. A polarizing plate (6) extracts a linearly-polarized-light component having a specific polarization direction from the light emitted by the waveguide member (4). A selection unit (7) selects the polarization direction of the linearly-polarized-light component extracted by the polarizing plate (6). A light-reception unit (8) detects the intensity of the linearly-polarized-light component of the light extracted by the polarizing plate (6). A measurement unit (10) measures the refractive index of a sample (12) on the basis of the light intensity detected by the light-reception unit (8). The waveguide member (4) has a plurality of planar side surfaces (4Aa, 4Ab) for which one of the plurality of linearly-polarized-light components included in the entering light is p-polarized and that each have different responses to p-polarized light.
Inventors:
Higo Morihide
Mitsuo Masaru
Mitsuo Masaru
Application Number:
JP2018537152A
Publication Date:
December 16, 2020
Filing Date:
August 22, 2017
Export Citation:
Assignee:
National University Corporation Kagoshima University
International Classes:
G01N21/41
Domestic Patent References:
| JP2009533696A | ||||
| JP200357168A | ||||
| JP9329542A | ||||
| JP2002357538A | ||||
| JP2005321244A |
Foreign References:
| US5485277 |
Attorney, Agent or Firm:
Kimura Mitsuru
Takanori Suetomi
Koichi Yamaguchi
Yamata Uta
Takanori Suetomi
Koichi Yamaguchi
Yamata Uta