| 摘要 |
PURPOSE:To enable the easy follow-up of the illuminating direction of an illuminating light to the movement of an object by providing a gaze direction detecting part and a control part and controlling a driving part based on the signal from the gaze direction detecting part. CONSTITUTION:A control part 6 inputs a signal from a gaze direction detecting part 5 and outputs a signal controlling a driving part 3 so that the illuminating direction of the illuminating light from a light source 1 accords with the gaze direction of an observer. The frequency band range of fine vibrations of the human eye is 10-20Hz and 70-90Hz, although it varies depending on the state of the observer. Thus, in the control part 6, the above two band range components of the signals from the gaze direction detecting part 5 are removed, and the driving part 3 is controlled based on the resulting signal. Hence, the rapid follow-up to an object 4 can be achieved without insignificantly moving the driving part 3 due to fine vibration of the eyeball of the observer. |
