| 摘要 |
<p>An image forming lens includes: a first optical system (G1) positioned on the object side, a second optical system (G2) positioned on the image side, and an aperture stop (FA) interposed between the first optical system (G1) and the second optical system (G2), wherein the first optical system (G1) includes a first lens group (GF1) which is on the object side and has two negative lenses (E1,E2), and another lens group (GR1) which is positioned on the aperture stop side, wherein the distance between the first lens group and said other lens group is the largest, and wherein the second optical system (G2) includes a second lens group (GF2) in which, in the order from the aperture stop side, a first positive lens (E4), a first negative lens (E5), a second negative lens (E6), and a second positive lens (E7) are arranged, and another lens group (GR2) positioned on the image side and having one positive lens (E8).</p> |
