| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a low-cost variable focal length lens that can achieve superior optical performance, to provide an optical device including the variable focal length lens, and to provide a method of adjusting the variable focal length lens. <P>SOLUTION: The variable focal length lens includes orderly from an object, a front lens group GF, an iris diaphragm S and a rear lens group GR and changes the focal length by changing at least one air interval inside the front lens group GF, air intervals of the front lens group GF and the rear lens group GR, and at least one air interval inside the rear lens group GR. The variable focal length lens includes an adjustment mechanism which after assembling the front lens group GF, the iris diaphragm S and the rear lens group GR, adjusts position to eccentrically shift or eccentrically tilt at least some lens groups of the front lens group GF and to eccentrically shift or eccentrically tilt at least some lens groups of the rear lens group GR. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
