| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens which permits wide-angle observation of an upright image in an ocular fundus observation of an ophthalmological area. <P>SOLUTION: Fixing a plurality of high refractive index lenses 1, 2, 3, 4 and 5 by a cylindrical outer cylinder 6 and crossing observation light twice in the interior permit an upright image of a wide area of the ocular fundus to be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT |
