Disk unit, confocal scanner, and confocal microscope

6:

• The disk unit according to claim 1 further comprising:
• a coupling shaft that connects the first disk and the second disk;
• and
• a drive unit that rotatively drives the coupling shaft.

7:

• A confocal scanner comprising:
• the disk unit according to claim 1;
• light induction units that form a Koehler illumination system together with the microlenses within a first illumination region set in either one of the first region or the second region of the first disk and induce a plurality of rays of split light split by the microlenses within the first illumination region into a second illumination region set in the other of the first region and the second region of the first disk;
• and
• a beam splitter that is disposed between one surface of the first disk and the other surface of the second disk, allows light through the microlenses within the second illumination region to be transmitted therethrough, and reflects light incident from the second disk side toward an outward side of the first disk and the second disk in the radial direction.

8:

• The confocal scanner according to claim 7,
• wherein the light induction units include:
• a polarization beam splitter which allows light in a first polarization state to be transmitted therethrough and reflects light in a second polarization state;
• a ¼ wavelength plate which is disposed between the polarization beam splitter and the first disk, converts light in the first polarization state which has been transmitted through the beam splitter into light in a third polarization state, and converts the split light in the third polarization state into light in the second polarization state;
• a split light guide unit which guides the split light reflected by the polarization beam splitter to the second illumination region;
• and
• a Fourier lens which is disposed in an optical path of the split light and forms a part of the Koehler illumination system.

9:

• A confocal microscope comprising:
• the confocal scanner according to claim 7 emitting illumination light for scanning a sample;
• a light source unit that outputs light for generating the illumination light;
• and
• an image capturing device that captures an image of a confocal image of the sample.