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    • 2. 发明申请
    • INFRARED LENS UNIT, IMAGE CAPTURE MODULE, AND IMAGE CAPTURE DEVICE
    • 红外线透镜单元,图像捕捉模块和图像捕获设备
    • US20140185134A1
    • 2014-07-03
    • US14237483
    • 2012-08-10
    • Takashi KamitakaharaYoshiaki MinagawaTakashi Sugiyama
    • Takashi KamitakaharaYoshiaki MinagawaTakashi Sugiyama
    • G02B13/14G02B5/28
    • G02B13/14G02B13/0035
    • An infrared lens unit includes, in order from the object side, an aperture, a lens group, and a band-pass filter which passes a light beam of a prescribed wavelength band of the infrared region. The lens group further includes, in order from the object side, a first meniscus lens which has a positive power and is convex on the object side, a second meniscus lens which has a positive power and is convex on the image side, and a convex lens which has a positive power and is convex on the object side. The lens group further includes a near-telecentric state on the image side, wherein the angle of entry of the light beam into the band-pass filter is either 0° or close to 0°. Thus, it is possible to accurately pass a light beam of a prescribed wavelength band of the infrared region by the lens unit.
    • 红外透镜单元从物体侧依次包括通过红外区域的规定波长带的光束的光圈,透镜组和带通滤光器。 透镜组从物体侧起依次包括具有正光焦度并且在物体侧凸出的第一弯月形透镜,具有正光焦度并且在像侧凸起的第二弯月透镜,以及凸面 透镜,其具有正的功率并且在物体侧上是凸的。 透镜组还包括在图像侧的近远心状态,其中光束进入带通滤光器的入射角为0°或接近0°。 因此,可以通过透镜单元精确地传递红外区域的规定波长带的光束。