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    • 34. 发明授权
    • Photographic optical system having enhanced spectral transmittance
characteristics
    • 具有增强的光谱透射特性的照相光学系统
    • US4716284A
    • 1987-12-29
    • US709447
    • 1985-03-08
    • Tsunefumi Tanaka
    • Tsunefumi Tanaka
    • G03B13/36G02B7/28G02B7/32G03B3/00G03B3/10
    • G02B7/282
    • The disclosed photographic optical system with a focus detector is constructed with an objective lens portion and an optical path splitting surface arranged on the image side thereof. An optical element and an image receiver are successively arranged on one of the split optical paths. A beam source for projecting an object sensing beam in the infrared wavelength region, or a photo-sensor for sensing the reflection of the object sensing beam from an object is arranged on the other split optical path. The spectral transmittance characteristic of the objective lens portion is different from that of the optical element, and is constructed to pass the wavelength region of the object sensing beam. The superimposed characteristic of the spectral transmittance characteristic of the objective lens portion and the spectral transmittance characteristic of the optical element are matched with the sensitivity characteristic of the image receiver.
    • 所公开的具有焦点检测器的照相光学系统由物镜部分和布置在其像侧上的光路分离表面构成。 光学元件和图像接收器被连续布置在一个分离光路上。 用于在红外波长区域中投影物体感测光束的光束源或用于感测物体的物体感测光束的反射的光电传感器布置在另一个分割光路上。 物镜部分的光谱透射率特性与光学元件的光谱透射特性不同,并被构造成通过物体感测光束的波长区域。 物镜部分的光谱透射率特性和光学元件的光谱透射率特性的叠加特性与图像接收器的灵敏度特性相匹配。
    • 36. 发明授权
    • Zoom lens
    • 变焦镜头
    • US07457045B2
    • 2008-11-25
    • US11969738
    • 2008-01-04
    • Toyokatsu FujisakiTsunefumi Tanaka
    • Toyokatsu FujisakiTsunefumi Tanaka
    • G02B15/14
    • G02B15/177
    • A zoom lens includes, in order from an object side to an image side, a first lens unit of negative refractive power, a second lens unit of positive refractive power, and a third lens unit of positive refractive power. The first lens unit moves in a locus convex toward the image side and the second lens unit moves toward the object side during zooming from a wide-angle end to a telephoto end. The object side principal point position of the first lens unit is within the first lens unit. The movement locus of the image side principal point position of the first lens unit during zooming from the wide-angle end to the telephoto end intersects with the movement locus of the object side principal point position of the second lens unit during zooming from the wide-angle end to the telephoto end.
    • 变焦透镜从物体侧到像侧依次包括负折光力的第一透镜单元,正屈光力的第二透镜单元和正折光力的第三透镜单元。 第一透镜单元在从广角端到望远端的变焦期间沿朝向图像侧凸起的轨迹移动,并且第二透镜单元朝向物侧移动。 第一透镜单元的物体侧主点位置在第一透镜单元内。 在从广角端到望远端的变焦期间,第一透镜单元的像侧主点位置的移动轨迹与第二透镜单元在从广角端到远摄端的变焦期间的物体侧主点位置的移动轨迹相交, 角度端到远摄端。
    • 37. 发明申请
    • ZOOM LENS
    • 变焦镜头
    • US20080186588A1
    • 2008-08-07
    • US11969738
    • 2008-01-04
    • Toyokatsu FujisakiTsunefumi Tanaka
    • Toyokatsu FujisakiTsunefumi Tanaka
    • G02B15/14
    • G02B15/177
    • A zoom lens includes, in order from an object side to an image side, a first lens unit of negative refractive power, a second lens unit of positive refractive power, and a third lens unit of positive refractive power. The first lens unit moves in a locus convex toward the image side and the second lens unit moves toward the object side during zooming from a wide-angle end to a telephoto end. The object side principal point position of the first lens unit is within the first lens unit. The movement locus of the image side principal point position of the first lens unit during zooming from the wide-angle end to the telephoto end intersects with the movement locus of the object side principal point position of the second lens unit during zooming from the wide-angle end to the telephoto end.
    • 变焦透镜从物体侧到像侧依次包括负折光力的第一透镜单元,正屈光力的第二透镜单元和正折光力的第三透镜单元。 第一透镜单元在从广角端到远摄端的变焦期间沿朝向图像侧凸起的轨迹移动,并且第二透镜单元朝向物侧移动。 第一透镜单元的物体侧主点位置在第一透镜单元内。 在从广角端到望远端的变焦期间,第一透镜单元的像侧主点位置的移动轨迹与第二透镜单元的变焦期间的物体侧主点位置的移动轨迹相交, 角度端到远摄端。