| 摘要 |
<p>A zoom lens device (10) comprises lens groups (11, 12, 13, 14, 15). The third lens group (compensator lens group) (13) is disposed between the two second and fourth lens groups (12, 14) constituting a variator lens group. The second and fourth lens groups (12, 14) are held by a common variator lens frame (22) and moved in a unit. Thus degradation of optical characteristics due to misalignment of the lens groups can be avoided even if lens groups are combined into such a structure. An optical device and a projector are also disclosed.</p> |
