Control device, operation method of control device, and operation program of control device

An operation method of a control device of an imaging apparatus including a light source and an imaging element, in which the light source is able to irradiate an observation target with illumination light from a plurality of irradiation positions having different irradiation angles, and the imaging element outputs an interference fringe image by imaging an interference fringe between diffracted light, which is the illumination light diffracted by the observation target, and reference light, which is the illumination light that does not pass through the observation target, the operation method comprising:

• acquiring positional information indicating a position of the observation target;
• setting, from among the plurality of irradiation positions, a required irradiation position, which is an irradiation position required for obtaining a plurality of the interference fringe images that are sources of a super-resolution interference fringe image having a resolution exceeding a resolution of the imaging element, as a subset of the plurality of irradiation positions corresponding to a region that includes the position of the observation target indicated by the positional information, using a correspondence table indicating correspondences between different regions that include the position of the observation target and different subsets of the plurality of irradiation positions comprising variable number of irradiation positions;
• causing the light source to emit the illumination light from the required irradiation position by controlling an operation of the light source;
• and
• causing the imaging element to output the interference fringe image at each required irradiation position.

A non-transitory computer-readable storage medium storing an operation program of a control device of an imaging apparatus including a light source and an imaging element, in which the light source is able to irradiate an observation target with illumination light from a plurality of irradiation positions having different irradiation angles, and the imaging element outputs an interference fringe image by imaging an interference fringe between diffracted light, which is the illumination light diffracted by the observation target, and reference light, which is the illumination light that does not pass through the observation target, the operation program causing a computer to function as:

• acquire positional information indicating a position of the observation target;
• set, from among the plurality of irradiation positions, a required irradiation position, which is an irradiation position required for obtaining a plurality of the interference fringe images that are sources of a super-resolution interference fringe image having a resolution exceeding a resolution of the imaging element, as a subset of the plurality of irradiation positions corresponding to a region that includes the position of the observation target indicated by the positional information, using a correspondence table indicating correspondences between different regions that include the position of the observation target and different subsets of the plurality of irradiation positions comprising variable number of irradiation positions;
• cause the light source to emit the illumination light from the required irradiation position by controlling an operation of the light source;
• and
• cause the imaging element to output the interference fringe image at each required irradiation position.