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    • 32. 发明公开
    • Compact lens for digital image acquisition and image acquisition device
    • 用于数字图像采集和图像采集设备的紧凑型镜头
    • EP1744188A2
    • 2007-01-17
    • EP06117267.2
    • 2006-07-14
    • Schott AG
    • Pawlowski, EdgarBrinkmann, MatthiasBeier, Prof. Dr. Wolfram
    • G02B5/32G02B13/00G02B15/14
    • G02B13/006G02B5/1814G02B9/10G02B9/12G02B13/0015G02B13/003G02B13/0045G02B13/0055G02B13/009G02B15/00G02B15/14G02B27/0037G02B27/4211G02B27/4277
    • The invention relates to a compact lens with fixed or variable focal length for digital image acquisition.
      According to the invention, a refractive optical element of the lens or a group of elements on a light entry side of the lens is provided as a compound lens having a first lens element from a glass or optical ceramics with a first index of refraction and a second lens element from a plastic with a second index of refraction which is smaller than the first index of refraction, the first lens element being located on the beam path in front of the second lens element and on a light entry side of the lens. The lens also comprises at least one diffractive optical element. With a compactly built lens, imaging errors can thus be minimized by simple means. The diffractive optical element directly on or at a transparent cover is preferably made or provided for covering the detector array.
      Another aspect of the invention relates to a digital image acquisition device with such a lens.
    • 本发明涉及用于数字图像采集的具有固定焦距或可变焦距的紧凑型透镜。 根据本发明,透镜的折射光学元件或透镜的光入射侧上的一组元件被设置为具有第一透镜元件的复合透镜,该第一透镜元件来自具有第一折射率的玻璃或光学陶瓷和 第二透镜元件由具有小于第一折射率的第二折射率的塑料制成,第一透镜元件位于第二透镜元件前方的光路上和透镜的光入射侧上。 该透镜还包括至少一个衍射光学元件。 通过紧凑的镜头,可以通过简单的手段将成像误差降至最低。 直接在透明盖上或在透明盖上的衍射光学元件优选地被制造或提供用于覆盖探测器阵列。 本发明的另一方面涉及一种具有这种透镜的数字图像采集装置。