| 摘要 |
PURPOSE:To form an optical imaging element which is small in size, is inexpensive and permits long focusing by forming prism surfaces on one side and lens surfaces on the other side, and arranging these in an array shape. CONSTITUTION:An imaging element 10 consists of a prism array 11 of which the aperture parts 12 are provided with curvature, wherein the curvatures of the aperture parts 12 act as lenses. Hence, this element 10 forms images in the manner similar to that of conventional in-prism lenses and similarly, the focuses are made longer. The lens surfaces are arranged densely or by leaving intervals. Since such elements 10 are formed integrally and simultaneously by using plastic materials or the like, they are formed inexpensively, and the focuses are made longer. |
