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    Optical lens system comprising at least one lens of a synthetic material
    4.
    发明授权
    Optical lens system comprising at least one lens of a synthetic material 失效
    光学透镜系统，包括合成材料的至少一个透镜

    公开(公告)号：US06665132B2

    公开(公告)日：2003-12-16

    申请号：US10122745

    申请日：2002-04-15

    申请人： Bernardus Hendrikus Wilhelmus Hendriks ,  Fransiscus Christiaan Van Dorst ,  Fransiscus Marinus Andrea Maria Van Gaal ,  Cornelius Antonius Nicolaas Maria Van Der Vleuten

    发明人： Bernardus Hendrikus Wilhelmus Hendriks ,  Fransiscus Christiaan Van Dorst ,  Fransiscus Marinus Andrea Maria Van Gaal ,  Cornelius Antonius Nicolaas Maria Van Der Vleuten

    IPC分类号： G02B702

    CPC分类号： G11B7/22 ,  G11B7/1374 ,  G11B2007/13727

    摘要： The invention relates to an optical lens system (39) which is suitable for use in an optical scanning device (15) for reading and/or writing an optically scannable record carrier (9). The lens system comprises a first lens or objective lens (45) and a second lens or auxiliary lens (47) which is small in comparison with the first lens and which, in operation, is positioned between the first lens and the record carrier. The lenses are arranged in a lens holder (61). According to the invention, the lens holder (61) and one of the two lenses (45, 47) are manufactured as one integrated part (63) from a transparent synthetic material by means of a moulding process, and the other lens is arranged in the integrated part as a separate component, with a chamber (85) enclosed by the lens holder and the two lenses communicating with the environment of the lens system via an air vent connection (93). The lens system thus comprises only two parts to be assembled, so that the assembling process is considerably simplified. The air vent connection prevents the occurrence of overpressure in the chamber that might result from a temperature increase of the lens system and cause unwanted mechanical deformations of the integrated part. In a preferred embodiment, the integrated part (63) comprises the second lens or auxiliary lens (47), and the air vent connection comprises at least one groove-like channel (93), which is formed in a surface of a lens-holding portion (69) provided in the integrated part for holding the objective lens (45).

    摘要翻译： 本发明涉及一种光学透镜系统（39），其适用于用于读取和/或写入光学可扫描记录载体（9）的光学扫描装置（15）。 透镜系统包括与第一透镜相比较小并且在操作中位于第一透镜和记录载体之间的第一透镜或物镜（45）和第二透镜或辅助透镜（47）。 根据本发明，透镜架（61）和两个透镜（45,47）中的一个由透明合成材料通过装置制造为一个整体部分（63） 并且另一个透镜作为单独的部件布置在整体部分中，其中由透镜保持器包围的腔室（85）和两个透镜经由通气连接（93）与透镜系统的环境连通 ）。 因此，透镜系统仅包括要组装的两个部件，使得组装过程被大大简化。 通气连接防止腔室中由于透镜系统的温度升高而产生过压，并引起集成部件的不期望的机械变形。在优选实施例中，集成部件（63）包括第二透镜或辅助 透镜连接部分包括形成在设置在用于保持物镜（45）的一体化部分中的透镜保持部分（69）的表面中的至少一个沟槽状通道（93） 。