| 摘要 |
<p>An improved image intensifier binocular, so-called goggle, of the type having only one image intensifier tube (2) is working with an effective diameter of its entrance photocathode (3) below 15 mm and therefore an objective (1) having an accordingly shortened focal length. This combination will substantially increase the depth of field of the goggle and also enable a design of smaller weight. <IMAGE></p> |
