Distance measurement device, distance measurement method, and distance measurement program

A measurement device comprising:

• an imaging sensor which captures, by performing actual exposure, a subject image of a subject;
• an imaging optical system which forms the subject image;
• a light emitter which emits directional light along an optical axis direction of the imaging optical system;
• a light receiver, which is different from the image sensor, and which receives reflected light of the directional light from the subject, the light receiver deriving a distance to the subject based on a timing at which the directional light is emitted by the light emitter and a timing at which the reflected light is received by the light receiver;
• a processor configured to perform a distance measurement operation by the light emitter and the light receiver and an imaging operation by the image sensor;
• and
• a derivation circuit performing the distance measurement operation,
• wherein the derivation circuit derives the distance in a case where there is no focus adjustment error by a focus adjustment unit performing focus adjustment of the imaging optical system with respect to the subject or there is no exposure adjustment error by an exposure adjustment unit adjusting exposure in a case where the imaging sensor performs imaging;
• and
• wherein a distance measurement by the light emitter, the light receiver, and the derivation circuit is performed a number of times determined in advance according to subject brightness or exposure state specification information of the measurement device.

A measurement device comprising:

• an imaging sensor which captures, by performing actual exposure, a subject image of a subject;
• an imaging optical system which forms the subject image;
• a light emitter which emits directional light along an optical axis direction of the imaging optical system;
• a light receiver, which is different from the image sensor, and which receives reflected light of the directional light from the subject, the light receiver deriving a distance to the subject based on a timing at which the directional light is emitted by the light emitter and a timing at which the reflected light is received by the light receiver;
• a processor configured to perform a distance measurement operation by the light emitter and the light receiver and an imaging operation by the image sensor;
• a derivation circuit performing the distance measurement operation, and a display which displays an image, wherein the processor performs control such that the display displays a motion image captured by the imaging sensor and displays information relating to the distance to the subject derived by the derivation circuit, and
• wherein a distance measurement by the light emitter, the light receiver, and the derivation circuit is performed a number of times determined in advance according to subject brightness or exposure state specification information of the measurement device.