Device for detecting substance being measured

A detection device comprising:

• a container that contains solution and a composite particle combining a substance to be measured and a magnetic labeling substance;
• a magnetic field applying unit that applies a magnetic field to a predetermined region so as to collect the composite particle, wherein spatial light is incident to the predetermined region other than lower region of the container;
• an imaging unit that captures an image of the composite particle collected in the predetermined region where the spatial light is incident;
• and
• a detecting unit that detects the composite particle based on the image captured by the imaging unit
• wherein the magnetic field applying unit is disposed above the container, and
• wherein the imaging unit is disposed below the container.

A detection device comprising:

• a container that contains solution and a composite particle combining a substance to be measured and a magnetic labeling substance;
• a magnetic field applying unit that applies a magnetic field to a predetermined region so as to collect the composite particle, wherein spatial light is incident to the predetermined region other than lower region of the container;
• an imaging unit that captures an image of the composite particle collected in the predetermined region where the spatial light is incident;
• and
• a detecting unit that detects the composite particle based on the image captured by the imaging unit
• wherein the magnetic field applying unit has a first coil, and
• wherein the imaging unit is disposed at a position facing the container across the first coil, so as to capture an image of the inside of the container through the inside of the first coil.