Cassegrain reflector retention mechanism, microscope equipped with same, and method for attaching Cassegrain reflector

1. A Cassegrain reflector retention mechanism for retaining a Cassegrain reflector that includes a primary mirror and a secondary mirror disposed coaxially with the primary mirror and laterally supported by a plurality of supporting rods and is used to reflect light incident from an opening formed on an axial line of the primary mirror by the secondary mirror, reflect the light by the primary mirror, and emit the light to a measurement position from a side of the secondary mirror, comprising:

a retainer that retains the Cassegrain reflector; and

a rotation adjustment mechanism that adjusts rotational positions of the plurality of supporting rods of the Cassegrain reflector retained by the retainer about the axial line,

wherein the Cassegrain reflector is installed coaxially as a pair of Cassegrain reflectors with the measurement position interposed therebetween; and

wherein the plurality of supporting rods of the pair of Cassegrain reflectors overlap each other when viewed along the axial line rotating the plurality of supporting rods of at least one of the pair of Cassegrain reflectors about the axial line for adjusting rotational position of the pair of Cassegrain reflectors.

2. The Cassegrain reflector retention mechanism according to claim 1 ,

wherein the rotation adjustment mechanism includes a fixing part that fixes the rotational positions of the plurality of supporting rods of the Cassegrain reflector.

3. The Cassegrain reflector retention mechanism according to claim 1 ,

wherein the Cassegrain reflector is attachable to or detachable from the retainer along with the rotation adjustment mechanism.

4. The Cassegrain reflector retention mechanism according to claim 3 ,

wherein the retainer includes a positioning part that prevents the Cassegrain reflector from rotating along with the rotation adjustment mechanism.

5. A microscope comprising:

the Cassegrain reflector retention mechanism according to claims 1 ;

a Cassegrain reflector that is retained by the Cassegrain reflector retention mechanism;

a light source that irradiates light to a sample through the Cassegrain reflector; and

a detector that receives reflected light or transmitted light from a sample at the measurement position.

6. The microscope according to claim 5 , further comprising:

an upper Cassegrain reflector that is located above a sample; and

a lower Cassegrain reflector that is located below the sample,

wherein at least one of the upper Cassegrain reflector and the lower Cassegrain reflector is retained by the Cassegrain reflector retention mechanism, and

wherein the upper Cassegrain reflector and the lower Cassegrain reflector are the pair of Cassegrain reflectors.

7. A method for attaching a Cassegrain reflector that includes a primary mirror and a secondary mirror disposed coaxially with the primary mirror and laterally supported by a plurality of supporting rods and is used to reflect light incident from an opening formed on an axial line of the primary mirror by the secondary mirror, reflect the light by the primary mirror, and emit the light to a measurement position from a side of the secondary mirror, comprising:

an installation step of coaxially installing a pair of the Cassegrain reflectors with the measurement position interposed therebetween; and

an adjustment step of adjusting rotational positions so that the plurality of supporting rods of the pair of Cassegrain reflectors overlap each other when viewed along the axial line by rotating the plurality of supporting rods of at least one of the pair of Cassegrain reflectors about the axial line.

8. A method for attaching a Cassegrain reflector that includes a primary mirror and a secondary mirror disposed coaxially with the primary mirror and laterally supported by a plurality of supporting rods, is used to reflect light incident from an opening formed on an axial line of the primary mirror by a first region of the secondary mirror, reflect the light by the primary mirror, and emit the light to a measurement position from a side of the secondary mirror, and is used to reflect light reflected from a sample at the measurement position by the primary mirror, reflect the light by a second region of the secondary mirror, and emit the light from the opening, comprising:

an installation step of installing the Cassegrain reflector to face the measurement position; and

an adjustment step of adjusting rotational positions so that the plurality of supporting rods become line-symmetrical when viewed along the axial line with respect to a boundary line between the first region and the second region of the secondary mirror by rotating the plurality of supporting rods of the Cassegrain reflector about the axial line,

wherein the Cassegrain reflector is installed coaxially as a pair of Cassegrain reflectors with the measurement position interposed therebetween; and

wherein the plurality of supporting rods of the pair of Cassegrain reflectors overlap each other when viewed along the axial line rotating the plurality of supporting rods of at least one of the pair of Cassegrain reflectors about the axial line for adjusting rotational position of the pair of Cassegrain reflectors.