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1. 发明专利

JP2007079361A Imaging optical system 审中-公开
标题翻译：成像光学系统
公开(公告)号：JP2007079361A
公开(公告)日：2007-03-29
申请号：JP2005269672
申请日：2005-09-16
申请人： Nikon Corp , Tochigi Nikon Corp , 株式会社ニコン , 株式会社栃木ニコン
发明人： FUKUDA MITSURU , TANAKA YOJI
IPC分类号： G02B13/24
摘要： PROBLEM TO BE SOLVED: To provide an imaging optical system equipped with a mechanism achieving variable power, where at least chromatic aberration and distortion aberration are excellently corrected, and which has high resolving power and wide image size. SOLUTION: In the imaging optical system, a front group F1 having positive or negative refractive power, an aperture stop S, and a rear group F2 having positive refractive power are arranged in order from an object side, and the imaging optical system has an aberration variation compensating function for negating the variation of the caused aberration by widening an air distance d8 on an optical axis between the front group F1 and the rear group F2 when imaging magnification is increased from a low-magnification side (1-POS) to a high-magnification side (4-POS) by moving both the front group F1 and the rear group F2 to the object side. Assuming that the focal distance of the front group F1 is fF1, the focal distance of the rear group F2 is fF2, and the focal distance of the entire system of the optical system on the lowest-magnification side is fAm, the imaging optical system satisfies following expressions, 40 COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有实现可变功率的机构的成像光学系统，其中至少色差和畸变像差被良好地校正，并且具有高分辨率和宽的图像尺寸。解决方案：在成像光学系统中，从物体侧依次布置具有正的或负的折射光焦度的前面组F1，孔径光阑S和具有正折光力的后组F2，并且成像光学系统具有像差变化补偿功能，当从低倍率侧（1-POS）增大成像倍率时，通过加宽前组F1和后组F2之间的光轴上的空气距离d8来否定所引起的像差的变化，通过将前组F1和后组F2两者移动到对象侧而到高倍率侧（4-POS）。假设前组F1的焦距为fF1，则后组F2的焦距为fF2，最低倍率侧的光学系统的整个系统的焦距为fAm，成像光学系统满足以下表达式，40 <¾fF1 / fF2 <60,25 <¾fF¾/ fAm <45和0.5

2. 发明专利

JP2005077937A Front-diaphragm lens system 审中-公开
标题翻译：前透镜镜头系统
公开(公告)号：JP2005077937A
公开(公告)日：2005-03-24
申请号：JP2003310385
申请日：2003-09-02
申请人： Nikon Corp , Tochigi Nikon Corp , 株式会社ニコン , 株式会社栃木ニコン
发明人： FUKUDA MITSURU
IPC分类号： G02B13/04
摘要： PROBLEM TO BE SOLVED: To provide a front-diaphragm lens system whose distortion aberration is corrected to a level where there is practically no problem and whose viewing angle can be made wider than a conventional type.
SOLUTION: The lens system has an aperture diaphragm AP, a 1st lens group G1 with positive refracting power, a 2nd lens group G2 with negative refracting power, and a 3rd lens group G3 with positive refracting power, in order from an object side to an image side and meets conditions of conditional inequalities of (1): 0.6
摘要翻译：要解决的问题：为了提供将畸变像差校正到几乎没有问题的水平的前光圈透镜系统，并且其视角可以比常规类型更宽。
解决方案：透镜系统具有孔径光阑AP，具有正折射力的第一透镜组G1，具有负折射力的第二透镜组G2和具有正折射光焦度的第三透镜组G3，从物体（1）的条件不等式的条件：0.6

3. 发明专利

JP2005316052A Image forming optical system 审中-公开
标题翻译：图像成像光学系统
公开(公告)号：JP2005316052A
公开(公告)日：2005-11-10
申请号：JP2004132832
申请日：2004-04-28
申请人： Nikon Corp , Tochigi Nikon Corp , 株式会社ニコン , 株式会社栃木ニコン
发明人： FUKUDA MITSURU
IPC分类号： G02B13/24 , G02B15/16
摘要： PROBLEM TO BE SOLVED: To provide a variable-magnification image forming optical system where at least chromatic aberrations and distortion aberrations are corrected satisfactorily, and which has high resolution and a wide visual field.
SOLUTION: A front group G
F having positive refractive power, a diaphragm S, and a rear group G
R having positive refractive power are arranged, in this order starting from the object side. The lens 11, positioned closest to the object side of the front group, has a concave face on the object side. The lens 22, positioned closest to the image side of the rear group, has a concave face on the image side. When varying the magnification of the image forming optical system 10 from the low magnification side to the high magnification side, the front group and the rear group are separately moved to the object side, while reducing the arrangement distance of the diaphragm (aerial gap D1). The maximum image height Y' of the image forming optical system 10, the focal distance fm of the image forming optical system at the lowest magnification, the focal distance f
F of the front group and the focal distance f
R of the rear group satisfy the following conditional inequalities: 0.15 F /fm R /fm
摘要翻译：要解决的问题：提供一种可变放大倍率的图像形成光学系统，其中至少色差和畸变像差被令人满意地校正，并且具有高分辨率和宽视野。
解决方案：具有正折光力的前组G F ，具有正折光力的光阑S和后组G R 按此顺序排列从物体侧。最靠近前组的物体侧的透镜11在物体侧具有凹面。位于最靠近后组的像侧的透镜22在图像侧具有凹面。当从低倍率侧向高倍率侧改变成像光学系统10的放大率时，前面组和后面组分别移动到物体侧，同时减小了隔膜的布置距离（空中间隙D1）。图像形成光学系统10的最大图像高度Y'，最低倍率下的图像形成光学系统的焦距fm，前面组的焦距f F 和焦距f 后组的 R 满足以下条件不等式：0.15 F / fm <1.5和1.3 R / FM <1.7。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2004246139A Variable magnification imaging lens and image reader using the same 有权
公开(公告)号：JP2004246139A
公开(公告)日：2004-09-02
申请号：JP2003036641
申请日：2003-02-14
申请人： Nikon Corp , Tochigi Nikon Corp , 株式会社ニコン , 株式会社栃木ニコン
发明人： FUKUDA MITSURU , NISHIDA NATSUNO
IPC分类号： G02B15/16 , G02B13/24 , G06T1/00 , H04N1/04
摘要： PROBLEM TO BE SOLVED: To provide a bright variable magnification imaging lens capable of reading a color original or the like, the lens in which the fluctuation of aberration is restrained, the variable magnification ratio of imaging magnification is large and axial chromatic aberration is corrected in a well-balanced manner in a variable magnification process from a low magnification side to a high magnification side, and to provide an image reader including the lens.
SOLUTION: The variable magnification imaging lens is equipped with a front lens group Gf having positive refractive power, a rear lens group Gr having positive refractive power, and a diffraction optical element DOE having at least one diffraction optical surface, which are arranged in order from an object side, and is constituted so that the lens group Gf and the rear lens group Gr are moved to the object side together while changing a distance between the front lens group Gf and the rear lens group Gr in the case of variable magnification from the low magnification side to the high magnification side.
COPYRIGHT: (C)2004,JPO&NCIPI

5. 发明专利

JP2001066501A ZOOM LENS 失效
公开(公告)号：JP2001066501A
公开(公告)日：2001-03-16
申请号：JP23778199
申请日：1999-08-25
申请人： NIKON CORP , TOCHIGI NIKON CORP
发明人： SUZUKI MASATOSHI , FUKUDA MITSURU , TANAKA YOJI
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens provided with a lens group moving in the case of focusing and having a small effective diameter, especially. SOLUTION: This zoom lens is composed of a 1st lens group G1 having negative refractive power and a 2nd lens group having positive refractive power in order from an object side, and a distance between the 1st lens group G1 and the 2nd lens group is changed in the case of zooming. Then, the 1st lens group G1 is composed of a 1st lens group front group G1F having positive refractive power and a 1st lens group rear group G1R having negative refractive power, a distance between then is not changed in the case of zooming. In the case of focusing, only the rear group G1R is moved.

6. 发明专利

JP2002350722A IMAGE RE-FORMATION OPTICAL SYSTEM AND CONVERTER FURNISHED WITH THE SAME 失效
公开(公告)号：JP2002350722A
公开(公告)日：2002-12-04
申请号：JP2001160039
申请日：2001-05-29
申请人： TOCHIGI NIKON CORP , NIKON CORP
发明人： FUKUDA MITSURU , YANAGISAWA SHUNSUKE
IPC分类号： G02B13/00 , H04N5/225
摘要： PROBLEM TO BE SOLVED: To provide an image re-formation optical system which is usable as a converter which covers not only a wide angle lens for a wide image angle but also a zoom lens of which image angle varies and a telephoto lens. SOLUTION: The image re-formation optical system, which is mounted on the image side of an image formation lens system and re-forms a primary image made by the image formation lens system into a secondary image having a desired magnitude, is provided with a field lens group FL which has a positive refractive power, a front group F which has a negative refractive power, an optical member group P1 for erecting the secondary image, and a rear group R which has a positive refractive power. A partial lens L1 which constitutes the field lens group FL which has a positive refractive power is detachable from the image re-forming optical system, thus at least two forms are available.

7. 发明专利

JP2001075008A ZOOM LENS HAVING VIBRATION-PROOF FUNCTION 失效
公开(公告)号：JP2001075008A
公开(公告)日：2001-03-23
申请号：JP24817199
申请日：1999-09-02
申请人： NIKON CORP , TOCHIGI NIKON CORP
发明人： FUKUDA MITSURU
IPC分类号： G02B15/20 , G02B7/10 , G02B15/173 , G02B27/64 , G03B5/00
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens in which the fluctuation of the various kinds of aberration due to variable magnification and focusing is reduced while having a high variable power ratio and which has a vibration-proof function. SOLUTION: This is the zoom lens that orderly consists of a first lens group G1 having positive refracting power, a second lens group G2 having negative refracting power, a third lens group G3 having the positive refracting power, a fourth lens group G4 having the positive refracting power, a fifth lens group G5 having the negative refracting power and a sixth lens group G6 having the positive refracting power from an object side and in which each lens group is moved along a specified orbit at the time of the variable magnification from a wide angle end to a telephoto end, and the fourth lens group G4 constitutes the zoom lens that has a specified constitution and has the vibration-proof function to obtain a vibration-proof effect by moving the fourth lens group G4 in a direction perpendicular to an optical axis.

8. 发明专利

JP2001356271A ZOOM LENS USING DIFFRACTION OPTICAL ELEMENT 失效
公开(公告)号：JP2001356271A
公开(公告)日：2001-12-26
申请号：JP2000180356
申请日：2000-06-15
申请人： TOCHIGI NIKON CORP , NIKON CORP
发明人： FUKUDA MITSURU
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens where chromatic aberration is excellently compensated from a wide-angle end to a telephoto end or a low magnification end to a high magnification end and which has a variable power ratio being >=10 by using a diffraction optical element having a diffraction optical surface having easily manufactured shape. SOLUTION: This zoom lens is provided with a 1st lens group G1 having positive refractive power, a 2nd lens group G2 having negative refractive power, a 3rd lens group G3 having positive refractive power, a 4th lens group G4 having positive refractive power, a 5th lens group G5 having negative refractive power and a 6th lens group G6 having positive refractive power in order from an object side. In the case of variable power, at least the distances of three lens groups are changed, and then the lens is provided with the diffraction optical element DOE equipped with at least one diffraction optical surface.

9. 发明专利

JP2001174701A WIDE ANGLE PHOTOGRAPHIC LENS SYSTEM 失效
公开(公告)号：JP2001174701A
公开(公告)日：2001-06-29
申请号：JP35620999
申请日：1999-12-15
申请人： TOCHIGI NIKON CORP , NIKON CORP
发明人： FUKUDA MITSURU
IPC分类号： G02B13/04 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a photographic lens system which has a proper back-focal distance and has less distortion and is comprised of two lenses in two groups. SOLUTION: The lens system comprises a front group G1 consisting of one lens which has negative refracting power and has at least one aspherical surface and a rear group G2 consisting of one lens which has a positive refracting power and has at least one aspherical surface. The lens system is provided with an aperture stop S between the front group G1 and the rear group G2 and satisfies conditions 0.7

10. 发明专利

JP2000275516A IMAGE PICKUP LENS 失效
公开(公告)号：JP2000275516A
公开(公告)日：2000-10-06
申请号：JP8109699
申请日：1999-03-25
申请人： TOCHIGI NIKON CORP , NIKON CORP
发明人： FUKUDA MITSURU
IPC分类号： G02B13/24
摘要： PROBLEM TO BE SOLVED: To obtain an image pickup lens which has various aberrations excellently corrected, small variation of various aberration in power variation, a large power variation rate, and a sufficient marginal light quantity by employing 6-group constitution and meeting specific conditions. SOLUTION: This image pickup lens is a lens system of six-group and nine- lens provided with a 1st lens group G1 with positive refracting power, an aperture stop S, and a 2nd lens group G2 with positive refracting power in order from the object side. For power variation from low power to high power, the stop S moves together with the 1st lens groups G1 while the air interval between the 1st lens group G1 and 2nd lens group G2 is decreased and the whole lens system moves approaching the object side. This image pickup lens meets conditions of 1.0

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