| CPC A61B 1/00013 (2013.01) [A61B 1/00006 (2013.01); A61B 1/00096 (2013.01); A61B 1/00117 (2013.01); A61B 1/0655 (2022.02); A61B 1/0661 (2013.01)] | 11 Claims |
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1. A control device comprising:
a light source configured to generate light by an applied drive current;
a light source controller comprising hardware, the light source controller configured to apply the drive current to the light source to bring the light source into a state in which the light source repeats on and off at predetermined periodic intervals;
a signal generator configured to:
receive light generated by the light source; and
generate a signal according to the received light;
an optical path switch configured to switch an optical path of light generated by the light source between a state in which the light path is not incident on the signal generator and a state in which the light path is incident on the signal generator;
a determination circuit configured to:
determine whether a signal generated by the signal generator is a periodic signal that periodically changes in signal intensity,
determine that the signal generated by the signal generator is the periodic signal when the signal generated by the signal generator has a signal intensity periodically changed, and
determine that the signal generated by the signal generator is not the periodic signal when the signal generated by the signal generator has a constant signal intensity; and
a function controller comprising hardware, the function controller configured to perform control in which performance of a predetermined function is prohibited when the determination circuit determines that the signal is not the periodic signal and in which the performance of the predetermined function is permitted when the determination circuit determines that the signal is the periodic signal.
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