| 摘要 |
PURPOSE:To obtain uniform stereoscopic sense from the whole of a stereoscopic picture, by arranging a large-diameter convex lens in front of an optical path selector, and by making each of image pickup ranges of lenses constituting the optical path selector coincident with each other on one focal surface of the convex lens. CONSTITUTION:Due to the arrangement of a convex lens 4 in front of an optical path selector 5, the image pickup range of flat convex lenses 5(1)-5(3) constituting the optical path selector is coincident with a point P-point Q on the 1st focal surface C1 of the convex lens 4. A distance P'Q' from the point P to point Q is expressed by P'Q'=2f tantheta. Here, (f) is the focal length of the convex lens 4. Even if positions of the lenses 5(1)-5(3) move, the image pickup range on the 1st focal surface C1 of the lens 4 at each position is always the point P-point Q and unchanged. Therefore, if the image pickup is carried out by putting an object on the focal surface, a displayed stereoscopic picture has the equal quantity of stereoscopic information on the whole, and an observer can obtain a uniform stereoscopic image from the whole. |
