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    • 11. 发明授权
    • Zoom lens
    • 变焦镜头
    • US4702567A
    • 1987-10-27
    • US17025
    • 1987-02-18
    • Masatake KatoKeiji IkemoriTsunefumi TanakaKazuo Tanaka
    • Masatake KatoKeiji IkemoriTsunefumi TanakaKazuo Tanaka
    • G02B15/173G02B15/18
    • G02B15/173
    • A zoom lens having a component V which has at least one group of lens elements axially movable mainly for changing image magnification, a component C which has at least one group of lens elements axially movable for compensating for the image shift resulting from the change of image magnification to maintain the constant position of the image plane, and a compound component F positioned on the image side of either, or both, of said component V and said component C to be movable with zooming, and having a plurality of lens groups contributing to a small overall refractive power, whereby the focusing provision is made in at least one of the groups in said compound component F.
    • 具有分量V的变焦透镜具有至少一组主要用于改变图像放大率的可轴向移动的透镜元件组; C组件,其具有至少一组轴向可移动的透镜元件,用于补偿由图像变化引起的图像偏移 以保持图像平面的恒定位置,以及位于所述部件V和所述部件C中的任意一方或两者的图像侧上的复合部件F可以变焦地移动,并且具有多个透镜组, 小的总屈光力,由此在所述化合物组分F中的至少一个基团中进行聚焦。
    • 16. 发明授权
    • Ultrawide angle zoom objective
    • 超宽角缩放目标
    • US4477153A
    • 1984-10-16
    • US375667
    • 1982-05-06
    • Shigeyuki SudaKeiji Ikemori
    • Shigeyuki SudaKeiji Ikemori
    • G02B13/04G02B13/18G02B15/16
    • G02B15/161G02B13/04G02B13/18
    • Disclosed is a two-component zoom objective having a first lens component of negative power and a second lens component of positive power with the variable air separation between the first and second components effecting zooming. The aforesaid first lens component is constructed with four lenses. The first lens counting from the front is given an aspheric surface, and the air lens defined by the second and third lenses counting from the front and the four lenses in the aforesaid first lens component are appropriately configured to increase the angular field up to an ultrawide angle, while still permitting good correction of aberrations.
    • 公开了具有负功率的第一透镜分量和正功率的第二透镜分量的双分量变焦目标,其中第一和第二分量之间的可变空气分离实现变焦。 上述第一透镜部件由四个透镜构成。 从前面计数的第一透镜被给予非球面,并且由前面计数的第二和第三透镜限定的空气透镜和上述第一透镜部件中的四个透镜被适当地构造成将角度场增加到最远 角度,同时仍然允许良好的像差校正。
    • 20. 发明授权
    • Wide angle zoom lens
    • 广角变焦镜头
    • US4469412A
    • 1984-09-04
    • US551492
    • 1983-11-14
    • Akira TajimaKeiji Ikemori
    • Akira TajimaKeiji Ikemori
    • G02B13/04G02B13/18G02B15/14G02B15/16G02B15/177
    • G02B15/177G02B13/18G02B15/14
    • The wide angle zoom lens disclosed includes, from front to rear, a negative first lens group and a positive second lens group, both of which are moved axially in variable relation to each other to effect a change in the image magnification. The first lens group includes, front to rear, a first lens with a rear surface of strong negative refractive power, a second lens of convex curvature towards the front with a focal length having an absolute value not less than 30 times the shortest focal length of the entire system and with at least one of the surfaces thereof aspherical and a positive meniscus 3rd lens of forward convexity. According to one embodiment, the second lens is made of glass and according to another, of plastic.
    • 所公开的广角变焦透镜包括从前到后的负的第一透镜组和正的第二透镜组,它们彼此以可变的关系轴向移动以实现图像放大率的变化。 第一透镜组包括从前到后的具有强负折射力的后表面的第一透镜,具有朝向前方的凸曲率的第二透镜,焦距的绝对值不小于 整个系统和其至少一个表面非球面和正弯月面第三透镜的前凸。 根据一个实施例,第二透镜由玻璃制成,并且根据另一个塑料制成。