Patent ID: 9274104
Filing Date: 2016-03-01
CPC Classification: G01N

Claim Text:
1. A measuring system which uses an optical waveguide comprising: an optical waveguide having a sensing area to which first substances having a property of specifically bonding to subject substances to be measured are fixed; magnetic fine particles to which second substances having a property of specifically bonding to the subject substances are fixed; a magnetic field applying unit to generate a magnetic field for moving the magnetic fine particles, the magnetic field applying unit including a first magnetic field applying unit which applies a magnetic field in a direction for moving magnetic fine particles which are not combined with a subject substance at the sensing area further away from the optical waveguide without separating magnetic fine particles which are combined with a subject substance at the sensing area; a light source to input a light into the optical waveguide; and a light receiving element to receive the light output from the optical waveguide, wherein the magnetic field applying unit includes a core and a coil provided around the core, wherein an intensity of the light output from the waveguide is related to an amount of the magnetic fine particles combined with a subject substance, and wherein the core includes a plurality of core portions, a connection portion mechanically and magnetically connects first end portions of the core portions opposite to second end portions on an side of the sensing area, and a gap is provided between the second end portions.