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

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.