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    • 4. 发明申请
    • AFOCAL ATTACHMENT FOR PROJECTION LENS
    • 投影镜头的AFOCAL附件
    • WO2010039219A1
    • 2010-04-08
    • PCT/US2009/005374
    • 2009-09-29
    • EASTMAN KODAK COMPANYBIETRY, Joseph RaymondSILVERSTEIN, Barry D.
    • BIETRY, Joseph RaymondSILVERSTEIN, Barry D.
    • G02B15/22G03B21/54
    • G03B21/54G02B13/16G02B13/22G02B15/06
    • A projection apparatus has a spatial light modulator to modulate illumination from a laser light source. A base projection lens has, from its long conjugate side to its short conjugate side, a first lens group with negative focal length and with a first lens element that has a negative focal length and a second lens element of positive focal length, a second lens group of negative focal length and spaced apart from the first lens group and having one or more cemented lens elements, and a third lens group spaced apart from the second lens group and having a lens with a positive focal length. The base projection lens has a first field of view and is telecentric in its short conjugate. An afocal attachment to the base projection lens alters the first field of view by the same amount in both of two orthogonal directions.
    • 投影装置具有用于调制来自激光光源的照明的空间光调制器。 基底投影透镜从其长的共轭侧到其短的共轭侧具有负焦距的第一透镜组和具有负焦距的第一透镜元件和具有正焦距的第二透镜元件,第二透镜 并且具有一个或多个胶合透镜元件和与第二透镜组间隔开并且具有正焦距的透镜的第三透镜组。 基底投影透镜具有第一视场,并且在其短接头中是远心的。 与基准投影透镜的无焦附着在两个正交方向上将第一视场改变相同的量。