| 摘要 |
<p>The imaging optics (1) of the present invention comprise, in successive order from the object side, an aperture (15) and positive/negative/positive/negative first through fourth lenses (11-14), both surfaces of the fourth lens (14) being convex surfaces, and the optics satisfying the conditional expression -1000 < (r1 + r4)/(r1 - r4) < -55, where r1 and r4 are the radius of curvature, respectively, of the object-side surface of the first lens (11) and the image-side surface of the second lens (12).</p> |
