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    • 2. 发明授权
    • Macro zoom lens
    • 微距变焦镜头
    • US4178076A
    • 1979-12-11
    • US903174
    • 1978-05-05
    • Sadahiko TsujiYujiro Agari
    • Sadahiko TsujiYujiro Agari
    • G02B7/105G02B15/16G02B15/22G02B15/18
    • G02B7/105G02B15/16G02B15/22
    • The present invention relates to a macro zoom lens capable of taking a close up photograph at the one end at which a wide lens effect is obtained and at the other end at which a telephoto lens effect is obtained. One or two groups of the movable lenses in the zoom lens move in a movable direction along the optical axis at the one end at which a wide lens effect is obtained. At the other end, a telephoto lens effect is obtained. The distance between each lens and its next lens in the zoom lens in the ordinary zooming state is small as compared with the distance between the corresponding lenses at the time of taking a close up photograph.
    • 本发明涉及一种能够在获得宽透镜效果的一端拍摄近距离照片的宏观变焦透镜,以及在获得长焦镜头效果的另一端。 变焦透镜中的一组或两组可移动透镜沿着可在获得宽透镜效果的一端处的光轴沿可移动方向移动。 在另一端,获得长焦透镜效果。 在通常的变焦状态下,变焦透镜中的每个透镜与其下一个透镜之间的距离与拍摄近照时的相应透镜之间的距离相比较小。
    • 5. 发明授权
    • Compact zoom lens
    • 紧凑型变焦镜头
    • US4854681A
    • 1989-08-08
    • US931537
    • 1986-11-14
    • Masatake KatoSadahiko TsujiMuneharu SugiuraKazuo Tanaka
    • Masatake KatoSadahiko TsujiMuneharu SugiuraKazuo Tanaka
    • G02B15/173
    • G02B15/173
    • A compact zoom lens comprising, from front to rear, a first lens unit of positive power for focusing, a second lens unit of negative power axially movable in one direction when zooming from one end of a range of image magnification to the other, a third lens unit of positive power axially movable in a path convex toward the rear to maintain the constant position of an image surface which shifts with zooming, and a fourth lens unit of positive power for forming an image which remains stationary during zooming, wherein a fixed diaphragm is arranged in a space between the second and third lens units.
    • 一种紧凑型变焦透镜,包括从前到后具有用于聚焦的正光焦度的第一透镜单元,当从一定范围的图像放大倍数的一端变焦到另一方向时可以沿一个方向轴向移动的负光焦度的第二透镜单元, 具有正向功率的透镜单元,其在朝向后方凸出的路径中可轴向移动,以保持图像表面随着变焦而移动的恒定位置,以及用于形成在变焦期间保持静止的图像的正电力的第四透镜单元,其中, 布置在第二和第三透镜单元之间的空间中。