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    • 48. 发明授权
    • Photographic lens device
    • 摄影镜头装置
    • US4886342A
    • 1989-12-12
    • US355800
    • 1989-05-22
    • Yoshinobu KudoKiyohiro Yoshida
    • Yoshinobu KudoKiyohiro Yoshida
    • G02B7/02G02B9/16
    • G02B9/16G02B7/021
    • A photographing lens device wherein the optical axes of lenses can be aligned with a high degree of accuracy with a simple structure and at least a lens made of a plastic material can be secured to a lens barrel without causing a torsion thereof. The photographing lens device comprises first, second and third lenses arranged in this order from the object side. The second and third lenses have mutually contacting flat faces formed thereon outside effective light path regions therein, and the third lens is secured to the second lens at the flat faces of them by a bonding agent. The optical axis of the second and third lenses are aligned with each other by slipping the lenses along the flat faces thereof before adhesion. The second lens further has a contacting face formed outwardly of the flat face thereof and is pressed at the contacting face thereof against a face of a lens barrel while the first lens is pressed against the second lens by a pressing member coupled to the lens barrel.
    • 一种拍摄透镜装置,其中透镜的光轴可以以简单的结构以高精度对准,并且至少由塑料材料制成的透镜可以固定到透镜镜筒而不引起其扭转。 摄影镜头装置包括从物体侧依次排列的第一,第二和第三透镜。 第二透镜和第三透镜在它们之间的有效光路区域之间形成有相互接触的平面,并且第三透镜通过粘合剂在其平坦表面处固定到第二透镜。 第二透镜和第三透镜的光轴通过在粘合之前沿其平坦表面滑动透镜而相互对准。 第二透镜还具有从其平坦表面向外形成的接触面,并且在其接触面处被压靠在镜筒的表面上,同时通过联接到透镜镜筒的按压构件将第一透镜压靠第二透镜。
    • 49. 发明授权
    • Photographic camera
    • 摄影相机
    • US4806961A
    • 1989-02-21
    • US196809
    • 1988-05-18
    • Masatoshi KamitaniManabu InoueMotohiro NakanishiHiroshi OotsukaYoshinobu KudoYoshiaki Hata
    • Masatoshi KamitaniManabu InoueMotohiro NakanishiHiroshi OotsukaYoshinobu KudoYoshiaki Hata
    • G03B17/12G03B17/04G03B3/10
    • G03B17/04
    • A photographic camera having a photographic lens system freely settable to various focal lengths, an openable and closable lens cover disposed in front of the photographic lens system, an opening and closing mechanism for the lens cover, a motor for providing kinetic energy for the focal length changeover operations of the photographic lens system and also for the opening and closing operations of the lens cover, and a drivable cylinder capable of transmitting the kinetic energy from the motor to the photographic lens system and to the opening and closing mechanism in the form of a mechanical displacement. The opening and closing mechanism opens the lens cover by utilizing a mechanical displacement from a home position to an intermediate position of the drivable cylinder and closes the same by utilizing a mechanical displacement from the intermediate position to the home position of the drivable cylinder, and further changes over a focal position by utilizing mechanical displacements reversibly between the intermediate position and an end position of the drivable cylinder.
    • 具有可自由设定为各种焦距的摄影透镜系统的照相机,设置在摄影镜头系统前方的可开闭的镜头盖,用于镜头盖的打开和关闭机构,用于为焦距提供动能的电动机 照相镜头系统的切换操作以及镜头盖的打开和关闭操作以及能够将动力从电动机传递到照相镜头系统的可驱动气缸和开关机构,其形式为 机械位移。 打开和关闭机构通过利用从可驱动气缸的原始位置到中间位置的机械位移来打开透镜盖,并通过利用从可驱动气缸的中间位置到原始位置的机械位移来关闭它,并且进一步 通过在可驱动气缸的中间位置和终端位置之间可逆地利用机械位移来改变焦点位置。
    • 50. 发明授权
    • Gauss type lens system
    • 高斯型透镜系统
    • US4444473A
    • 1984-04-24
    • US189224
    • 1980-09-22
    • Yoshinobu Kudo
    • Yoshinobu Kudo
    • G02B9/60
    • G02B9/60
    • The present invention provides an improved Gauss type lens system of a five unit six element construction which fulfills the following lens conditions: ##EQU1## wherein: f represents the focal length of the whole lens system; r.sub.8 represents the radius of curvature of the intermediate cemented surface of the doublet of the fourth unit; .SIGMA.d represents the total length of the whole lens system; f.sub.1 represents the focal length of the first unit; f.sub.45 represents the focal length of the fourth unit; and F.sub.23 represents the focal length of an air lens formed between the second and third units (F.sub.23 =N.sub.3 /.phi..sub.23, if the refractive power of the air lens is .phi..sub.23).
    • 本发明提供了一种满足以下透镜条件的五单元六元件结构的改进的高斯型透镜系统:(1)0.52 f (3) (4)(5)其中:f表示整个透镜系统的焦距; r8表示第四单元的双重体的中间胶合表面的曲率半径; SIGMA d代表整个透镜系统的总长度; f1表示第一单元的焦距; f45表示第四单元的焦距; F23表示形成在第二和第三单元之间的空气透镜的焦距(F23 = N3 / phi23,如果空气透镜的屈光力为φ23)。