Shake correction device, shake correction method, shake correction program, lens device, and imaging device

A shake correction method using a shake correction device that corrects a shake of a captured image captured by an imager which images subjects through an imaging optical system, the shake correction device including a movement detection sensor that outputs a signal corresponding to a movement of the shake correction device, a drive mechanism that controls positions of subject light rays incident on a light receiving surface of the imager by driving at least one of a part of lenses included in the imaging optical system or the imager, and an optical splitter that divides an optical path of subject light rays incident on the imaging optical system into a first optical path which leads to the imager and a second optical path other than the first optical path in a position closer to the subject than a driven member driven by the drive mechanism and a subject light detector that receives the subject light rays which are incident on the imaging optical system and travel through the second optical path and outputs image signals of subject light images formed on the light receiving surface, the method comprising:

• a movement detection step of detecting the movement of the shake correction device based on the image signals of the subject light detector, and
• a drive control step of controlling the drive mechanism based on a first movement of the shake correction device based on the signal output from the movement detection sensor, and a second movement detected in the movement detection step,
• wherein in the movement detection step, distances of the subjects formed on the light receiving surface of the subject light detector from the imaging optical system are calculated based on output signals of the subject light detector, and the movement amount is detected as the second movement in a case where a movement amount of the subject of which the distance is maximum exceeds a threshold value.

A non-transitory computer readable medium storing a shake correction program causing a computer of a shake correction device that corrects a shake of a captured image captured by an imager which images subjects through an imaging optical system to perform a shake correction method,

• wherein the shake correction device includes a movement detection sensor that outputs a signal corresponding to a movement of the shake correction device, a drive mechanism that controls positions of subject light rays incident on a light receiving surface of the imager by driving at least one of a part of lenses included in the imaging optical system or the imager, and an optical splitter that divides an optical path of subject light rays incident on the imaging optical system into a first optical path which leads to the imager and a second optical path other than the first optical path in a position closer to the subject than a driven member driven by the drive mechanism, and a subject light detector that receives the subject light rays which are incident on the imaging optical system and travel through the second optical path and outputs image signals of subject light images formed on the light receiving surface, the shake correction method comprising:
• a movement detection step of detecting the movement of e shake correction device based on the image signals of the subject light images, and
• a drive control step of controlling the drive mechanism based on a first movement of the shake correction device based on the signal output from the movement detection sensor and a second movement detected in the movement detection step,
• wherein in the drive control step, distances of the subjects formed on the light receiving surface of the subject light detector from the imaging optical system are calculated based on output signals of the subject light detector, and the movement amount is detected as the second movement in a case where a movement amount of the subject of which the distance is maximum exceeds a threshold value.