| 摘要 |
PROBLEM TO BE SOLVED: To realize about 30% miniaturization in terms of an area ratio of a filter changing device to be used in a monitor camera and the like.SOLUTION: A filter switching device for switching blockage of an infrared-ray or transmission thereof in accordance with a photograph condition comprises: a holder 1 that includes an aperture part corresponding to an optical path of an imaging device and being composed of a non-magnetic substance; two kinds of sliders of a slider being arranged capable of sliding into the holder 1, including an infrared transmission filter and composed of the non-magnetic substance, and a slider including an infrared transmission filter and composed of the non-magnetic substance; and driving means for causing the sliders to be putt in and pulled out by switching to the optical path thereof, in which two kinds of the sliders are arranged at a different position in a slide direction and a vertical direction, slide in a mutually inverse direction, and are then put in and pulled out by switching to the optical path.SELECTED DRAWING: Figure 1 |
