| 摘要 |
An optical correcting element using a lenticular membrane (1) stretched on a frame (2) the membrane being of a thickness less than that required to be self-supporting whereby radiation is passed even though material in a self-supporting form would obstruct the radiation, the correcting element (1, 2) being associated with a spherical mirror (3) or any form of mirror or lens and being independent or adhered to the surface of a mirror or lens. |
