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    • 61. 发明授权
    • Retrofocus type optical system
    • 复眼型光学系统
    • US07116497B2
    • 2006-10-03
    • US11116082
    • 2005-04-27
    • Hiroshi Endo
    • Hiroshi Endo
    • G02B3/00G02B13/04
    • G02B27/0012
    • Provided is a retrofocus type optical system including a lens or a layer made of a material satisfying the following conditions of the Abbe constant νd and partial dispersion ratios θgd and θgF, νd
    • 提供了一种包括透镜或由满足以下条件的材料制成的反射型光学系统:阿贝常数nud和部分色散比ttdd和tagF,<β在线公式描述=“在线公式”结束 =“lead”?> nud <30,<?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula description =“In-line Formulas”end = 铅“?> thetagd <-3.333x10 <3> .nud + 1.40,<?in-line-formula description =”In-line Formulas“end =”tail“?> <?in-line -formulae description =“In-line Formulas”end =“lead”?> thetagF <-2.615-10 -3 .nud + 0.67。<?in-line-formula description =“In-line 公式“end =”tail“?>在该层设置在孔径光阑的前侧的情况下,该层被设计为具有正的折光力,并且在该层设置在后侧的情况下 的孔径光阑,该层被设计成具有负折射率。
    • 62. 发明授权
    • Lens barrel, photographic apparatus, and optical apparatus
    • 镜筒,照相装置和光学装置
    • US07102831B2
    • 2006-09-05
    • US10967670
    • 2004-10-19
    • Akio OmiyaTakehiko SenbaHiroshi EndoYoshihiro Ito
    • Akio OmiyaTakehiko SenbaHiroshi EndoYoshihiro Ito
    • G02B15/14G03B5/02
    • G02B7/102G02B7/021
    • A lens barrel has its collapsed length that can be further decreased by removing unnecessary space and bringing lens groups close to each other and a photographic apparatus incorporates the lens barrel. When the lens barrel is collapsed, at least a fourth lens group is retracted from a photographic optical axis by an advance/retract mechanism. In that case, a first lens group and third lens group are aligned along the optical axis and stuffed into the lens barrel, the fourth lens group is placed on the top, bottom, right, or left side of these lenses, and a second lens group is placed on the top, bottom, right, or left side of the first and third lens groups. This reduces the length of the lens barrel. During extension, the second and fourth lens groups are advanced onto the photographic optical axis by the advance/retract mechanism to extend the lens barrel greatly.
    • 镜筒具有其折叠长度,可以通过去除不必要的空间并使透镜组彼此靠近并且照相装置结合透镜镜筒来进一步减小。 当镜筒折叠时,至少第四透镜组通过前进/后退机构从摄影光轴缩回。 在这种情况下,第一透镜组和第三透镜组沿着光轴排列并填充到透镜镜筒中,第四透镜组被放置在这些透镜的顶部,底部,右侧或左侧,并且第二透镜 组放置在第一和第三透镜组的顶部,底部,右侧或左侧。 这减少了镜筒的长度。 在延伸期间,第二透镜组和第四透镜组通过前进/后退机构前进到摄影光轴上,以大大延长镜筒。