Patent ID: 9288398
Filing Date: 2016-03-15
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An action control device, comprising: a variable-transmittance neutral density (ND) filter configured to have transmittance that varies according to an applied voltage; an applied voltage control unit configured to control the applied voltage, applied to the variable-transmittance ND filter; a diaphragm control unit configured to control illuminance through a diaphragm; and an operation detection unit configured to detect a push operation associated with the action control device, wherein the push operation corresponds to an instruction for imaging preparation or imaging, wherein in an event of the detection of the push operation in a state of monitoring, the action control device switches from the state of monitoring to a state of imaging preparation or to a state of imaging, wherein, in the state of monitoring, prior to the detection of the push operation, the illuminance is controlled such that the applied voltage control unit applies a minimum applied voltage, corresponding to an inactive state of the variable-transmittance ND filter, to the variable-transmittance ND filter, and the diaphragm control unit opens or closes the diaphragm, and wherein, in the state of imaging preparation or in the state of imaging, subsequent to the detection of the push operation, the illuminance is controlled such that the applied voltage control unit applies a certain applied voltage to the variable-transmittance ND filter, which is in the inactive state, to control the transmittance based on the certain applied voltage, and the diaphragm control unit performs control such that the diaphragm enters a fully opened state.