| 摘要 |
PURPOSE: To uniformly illuminate without wasting light by changing a voltage impressed on a reflector made of piezoelectric material so that the shape of a gutter may be changed, changing an illumination pattern generated by the light of a tubular body and allowing a focal distance of a zoom lens to change. CONSTITUTION: The tubular body 18 is arranged in the interior of the gutter-like reflector 12 and also the body 18 is made to extend along the reflector 12. The reflector 12 is formed by laminating the 1st sheet 26 and the 2nd sheet material 28 made of the piezoelectric material, and two sheets are mutually bonded, the layer bend is changed in accordance with the change in the length of the 1st sheet 26. The device is provided with a means for impressing the voltage on the 1st sheet material 26, then, as the voltage is changed, the layer bend is changed and the shape of the gutter is changed, then, the illumination pattern of the light emitted from the tubular body 18 is changed, and the focal distance of the zoom objective lens for the camera is allowed to change. Thus, a tendency to ununiformly illuminate an object is prevented. |
