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1. 发明专利

JP2013145401A Imaging apparatus 审中-公开
标题翻译：成像设备
公开(公告)号：JP2013145401A
公开(公告)日：2013-07-25
申请号：JP2013078065
申请日：2013-04-03
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens which is especially suitable as a zoom lens for a compact high-performance digital camera, achieves a half angle-of-view of 38 degrees or more at a wide angle end, and is miniaturized in storage and provide an imaging apparatus using the zoom lens.SOLUTION: The zoom lens includes, in order from an object side along an optical axis, a first lens group I having negative refractive power, a second lens group II having negative refractive power, and a third lens group III having positive refractive power. The first lens group can be moved in the thickness direction of an imaging apparatus body. The first lens group is extended to the front in the thickness direction during photographing and stored in the imaging apparatus body during non-use. A prism folding an optical path is placed between the first lens group and the second lens group. The prism is fixed with respect to an image surface, when varying power and retracted when the first lens group is stored in the imaging apparatus body.
摘要翻译：要解决的问题：为了提供特别适用于小型高性能数码相机的变焦镜头的变焦镜头，在广角端部实现了38度以上的半视角，并且小型化存储并提供使用变焦透镜的成像装置。解决方案：变焦透镜从物体侧沿着光轴按顺序包括具有负折光力的第一透镜组I，具有负屈光力的第二透镜组II，以及具有正屈光力的第三透镜组III。第一透镜组可以在成像装置主体的厚度方向上移动。第一透镜组在拍摄期间在厚度方向上延伸到前部，并且在不使用期间被存储在成像装置主体中。折叠光路的棱镜被放置在第一透镜组和第二透镜组之间。棱镜相对于图像表面固定，当变化时，当第一透镜组被存储在成像设备主体中时，棱镜被缩回。

2. 发明专利

JP2013114223A Zoom lens and imaging apparatus 有权
标题翻译：变焦镜头和成像装置
公开(公告)号：JP2013114223A
公开(公告)日：2013-06-10
申请号：JP2011262799
申请日：2011-11-30
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , TAKANO YOHEI
IPC分类号： G02B15/20 , G02B13/18 , H04N5/225
摘要： PROBLEM TO BE SOLVED: To provide a small, high-performance zoom lens that can be designed to have increased speed in AF operation and reduced size in its driving system used for AF operation and can achieve a resolution compatible with an imaging element with a number of pixels exceeding ten million and to provide an imaging apparatus using such a zoom lens.SOLUTION: A zoom lens includes a positive first lens group G1, a negative second lens group G2, a negative third lens group G3, a positive fourth lens group G4, and a positive fifth lens group G5, which are arranged in order from the object side along the optical axis. Focusing is performed using the third lens group G3. The zoom lens satisfies condition (1): 0.1
摘要翻译：要解决的问题：为了提供一种小型，高性能的变焦镜头，其可以被设计成在AF操作中具有增加的速度和减小用于AF操作的驱动系统中的尺寸，并且可以实现与成像元件兼容的分辨率具有超过一千万像素的像素，并提供使用这种变焦透镜的成像装置。解决方案：变焦镜头包括按顺序布置的正的第一透镜组G1，负的第二透镜组G2，负的第三透镜组G3，正的第四透镜组G4和正的第五透镜组G5 从物体侧沿着光轴。使用第三透镜组G3进行聚焦。变焦透镜满足条件（1）：0.1

3. 发明专利

JP2013114204A Zoom lens and information device 审中-公开
标题翻译：变焦镜头和信息设备
公开(公告)号：JP2013114204A
公开(公告)日：2013-06-10
申请号：JP2011262512
申请日：2011-11-30
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , TAKANO YOHEI
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens that is suitable for use as a zoom lens for a digital camera, can be designed to have increased AF speed and reduced size in its AF driving system, and can achieve a resolution compatible with an imaging element with a number of pixels exceeding ten million.SOLUTION: A zoom lens includes a positive first lens group I, a negative second lens group II, a negative third lens group III, a positive fourth lens group IV, and a positive fifth lens group V, which are arranged in order from the object side. An aperture stop S is provided between the third lens group and the fourth lens group. During zooming from the wide angle end to the telephoto end, all the lens groups move in such a way that the distance between the first and second lens groups increases, the distance between the second and third lens groups increase, the distance between the third and fourth lens groups decreases, and the distance between the fourth and fifth lens groups decreases. Focusing is performed by displacing only the third lens group. The third lens group III is composed of one negative lens and has at least one aspheric surface on the image side and the object side respectively of the aperture stop S. The zoom lens satisfies predetermined conditional expression concerning the focal length and distortion.
摘要翻译：要解决的问题：为了提供适合用作数码相机的变焦镜头的变焦镜头，可以设计成在AF驱动系统中具有增加的AF速度和减小的尺寸，并且可以实现分辨率兼容具有超过一千万像素的像素的成像元件。解决方案：变焦镜头包括顺序排列的正的第一透镜组I，负的第二透镜组II，负的第三透镜组III，正的第四透镜组IV和正的第五透镜组V 从物体侧。在第三透镜组和第四透镜组之间设置孔径光阑S. 在从广角端到望远端的变焦期间，所有透镜组以这样的方式移动，使得第一和第二透镜组之间的距离增加，第二和第三透镜组之间的距离增加，第三和第三透镜组之间的距离增加第四透镜组减小，并且第四和第五透镜组之间的距离减小。通过仅移动第三透镜组来进行聚焦。第三透镜组III由一个负透镜组成，并且在孔径光阑S的图像侧和物体侧分别具有至少一个非球面。变焦透镜满足关于焦距和变形的预定条件表达式。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2012189911A Zoom lens, camera, and information device 有权
标题翻译：变焦镜头，相机和信息设备
公开(公告)号：JP2012189911A
公开(公告)日：2012-10-04
申请号：JP2011054832
申请日：2011-03-11
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YUKI , ATSUMI HIROMICHI , TAKANO YOHEI
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To allow achievement of a zoom lens which has a compact focus group for focusing, has the focus group displaced by a small amount in accordance with focusing, has quick AF, is small-sized, has high performance and a wide field angle, and is suitable for a digital still camera.SOLUTION: In the zoom lens, a first lens group I having a positive refracting power, a second lens group II having a negative refracting power, a third lens group III having a negative refracting power, a fourth lens group IV having a positive refracting power, and a fifth lens group V having a positive refracting power are disposed in order from the object, and a stop S is disposed between the third lens group and the fourth lens group. When the zoom lens is zoomed from a wide angle end to a telephoto end, each lens group is independently moved toward the object side. The third lens group comprises one negative lens. Focusing from an infinity object to a short-distance object is performed by movement of the third lens group in an optical axis direction. A focal length f3 and a thickness D3 on the optical axis of the third lens group III satisfy condition (1) 12
摘要翻译：要解决的问题：为了实现具有用于聚焦的紧凑聚焦组的变焦镜头，使焦点组根据聚焦移位少量，具有快速AF，小尺寸，具有高性能和宽视角，适用于数码相机。解决方案：在变焦镜头中，具有正折射率的第一透镜组I，具有负折射光焦度的第二透镜组II，具有负折射光焦度的第三透镜组III，具有负折射光焦度的第四透镜组IV 正折射率和具有正折射率的第五透镜组V从物体依次布置，并且在第三透镜组和第四透镜组之间设置光阑S. 当变焦镜头从广角端变焦到远摄端时，每个镜头组都独立地朝物体侧移动。第三透镜组包括一个负透镜。通过第三透镜组在光轴方向的移动来执行从无限远物体到短距离物体的聚焦。第三透镜组III的光轴上的焦距f3和厚度D3满足条件（1）12 <¾f3/D3¾<25。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2012168343A Zoom lens, information device having imaging function, and portable information terminal device 有权
标题翻译：变焦镜头，具有成像功能的信息设备和便携式信息终端设备
公开(公告)号：JP2012168343A
公开(公告)日：2012-09-06
申请号：JP2011029240
申请日：2011-02-14
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TAKANO YOHEI , ATSUMI HIROMICHI
IPC分类号： G02B15/20 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens which has a variable power ratio of 4 times or more even though a half angle of view at the wide angle end is 38 degrees or more and is sufficiently wide, has aberrations sufficiently corrected, and has a resolving power adapted to a small-sized image pickup device having a high resolution.SOLUTION: The zoom lens includes, in order from an object side to an image side, a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and a third lens group G3 having a positive refractive power. During zooming from the wide angle end to the telephoto end, the first lens group G1 moves along a locus convex toward the image side, the second lens group G2 moves toward the object side, and the third lens group G3 moves. The zoom lens satisfies the following conditional expressions (1), (2), and (3): (1) 2.2 4, and (3) ωw>38°, where F1p is a focal length of a positive lens L2 in the first lens group G1, F1 is a composite focal length of the first lens group G1, Fw is a focal length at the wide angle end, Ft is a focal length at the telephoto end, and ωw is a half angle of view at the wide angle end.
摘要翻译：要解决的问题：即使在广角端的半视角为38度以上且足够宽的情况下，提供具有4倍以上的可变功率比的变焦透镜，具有充分校正的像差并且具有适合于具有高分辨率的小尺寸图像拾取装置的分辨率。解决方案：变焦透镜从物体侧到像侧依次包括具有负折光力的第一透镜组G1，具有正折射光焦度的第二透镜组G2和具有正折射光焦度的第三透镜组G3，正屈光力。在从广角端到远摄端的变焦期间，第一透镜组G1沿着朝向像侧凸起的轨迹移动，第二透镜组G2朝向物体侧移动，并且第三透镜组G3移动。变焦透镜满足以下条件式（1），（2）和（3）：（1）2.2 4和（3）ωw> 38°，其中，F1p是第一透镜组G1中的正透镜L2的焦距，F1是第一透镜组G1的合成焦距，Fw是广角端的焦距，Ft是长焦的焦距结束，ωw是广角端的半视角。版权所有（C）2012，JPO＆INPIT

6. 发明专利

JP2009025364A Zoom lens and imaging device 有权
标题翻译：变焦镜头和成像装置
公开(公告)号：JP2009025364A
公开(公告)日：2009-02-05
申请号：JP2007185630
申请日：2007-07-17
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI
IPC分类号： G02B15/20 , G02B13/18 , H04N5/225 , H04N101/00
摘要： PROBLEM TO BE SOLVED: To provide a zoom lens which is suitable for, especially, a zoom lens for a compact/high performance digital camera, and can achieve high resolution responding to a variable power ratio of five or more times.
SOLUTION: The zoom lens comprises, in the order from the object side along the optical axis: a first lens group I with positive refractive power; a second lens group II with negative refractive power; a third lens group III with positive refractive power; a fourth lens group IV with negative refractive power; a fifth lens group V with positive refractive power; and a sixth lens group VI with positive or negative refractive power. When zooming from the wide angle end to the telephoto end, at least the second lens group II, the fourth lens group IV and the fifth lens group V are moved while the first lens group I is fixed. The first lens group I includes a reflecting optical element for bending an optical path, and the incoming surface or outgoing surface of the reflecting optical element have a curvature radius.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种适用于特别是用于小型/高性能数字照相机的变焦镜头的变焦镜头，并且可以实现响应于五次以上的可变功率比的高分辨率。解决方案：变焦透镜从物体侧沿着光轴的顺序包括具有正折光力的第一透镜组I; 具有负屈光力的第二透镜组II; 具有正屈光力的第三透镜组III; 具有负屈光力的第四透镜组IV; 具有正屈光力的第五透镜组V; 以及具有正或负屈光力的第六透镜组VI。当从广角端到望远端放大时，至少第二透镜组II，第四透镜组IV和第五透镜组V在第一透镜组I固定的同时移动。第一透镜组I包括用于弯曲光路的反射光学元件，并且反射光学元件的入射表面或出射表面具有曲率半径。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2005195789A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005195789A
公开(公告)日：2005-07-21
申请号：JP2004001181
申请日：2004-01-06
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , HAYASHI YOSHIAKI
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner which realizes an excellent optical scanning by attaining the acceleration and high write density of image formation in a tandem type color image forming apparatus. SOLUTION: Each set of a plurality of sets of scanning and imaging optical systems has one or more imaging devices, and an imaging device 8Y provided on the side of an optical deflector 7 and an imaging device 8M belonging to a different set are stacked closely in the axial direction of the optical deflector. When, in the optical deflector 7, the distance in the axial direction of a plurality of luminous fluxes directed to the stacked image forming devices 8Y and 8M is denoted by L, the wavelength of the luminous flux by λ, the distance from a deflection and reflection face to the first face of each scanning and imaging optical device by d1, and the beam spot diameter of a light spot on a plane to be scanned in a subscanning direction by W, then a condition (1) 5×10 -2 ≤(λ×d1)/(L×W)≤5×10 -1 is satisfied. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种通过在串联型彩色图像形成装置中获得图像形成的加速度和高写入密度来实现优异的光学扫描的光学扫描器。解决方案：多组扫描和成像光学系统的每组具有一个或多个成像装置，并且设置在属于不同组的光学偏转器7和成像装置8M侧的成像装置8Y是在光学偏转器的轴向方向上紧密堆叠。当在光学偏转器7中，指向层叠图像形成装置8Y，8M的多个光束的轴向距离由L表示时，光束的波长为λ，偏离距离，每个扫描和成像光学装置的第一面的反射面d1，以及要在副扫描方向上扫描的平面上的光斑的光点直径W，则条件（1）5×10 -2 ≤（λ×d1）/（L×W）≤5×10 -1 。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005049535A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005049535A
公开(公告)日：2005-02-24
申请号：JP2003204848
申请日：2003-07-31
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner of multibeam scanning system, a scanner that enables a spot diameter to be reduced using a coupling lens of a short focal distance and that has the ability to effectively diminish image fluctuation due to ambient temperature change.
SOLUTION: The optical scanner performs optical writing of a multibeam scanning system by converting a plurality of luminous fluxes from a light source 1 with multiple light emitting sources to essentially parallel luminous fluxes by a first optical system 2, linearly converging in the main scanning corresponding direction by a second optical system 100, deflecting by an optical deflector 5, and converging on a surface 7 to be scanned as an optical spot by a third optical system 600. The third optical system 600 has at least a single resin-made image forming element; the second optical system 100 has at least a single resin-made image forming element 11 and at least single glass-made image forming elements 10, 12; and the second optical system 100 is provided with a beam expanding function for expanding a luminous flux diameter by maintaining the parallel luminous flux shape in the main scanning direction.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供多光束扫描系统的光学扫描器，使用能够使用短焦距的耦合透镜来减小光斑直径的扫描器，并且具有有效地减少由于环境的图像波动的能力温度变化。解决方案：光学扫描器通过将来自具有多个发光源的光源1的多个光束通过第一光学系统2将基本上平行的光束转换成线性会聚在主体中来执行多光束扫描系统的光学写入通过第二光学系统100扫描相应的方向，由光学偏转器5偏转，并且会聚在被第三光学系统600作为光点扫描的表面7上。第三光学系统600至少具有单一的树脂制造图像形成元件; 第二光学系统100具有至少一个树脂制造的图像形成元件11和至少一个玻璃制成像元件10,12; 并且第二光学系统100设置有用于通过维持主扫描方向上的平行光通量形状来扩大光通量的光束扩展功能。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2004085663A Anamorphic imaging element and optical scanner 有权
公开(公告)号：JP2004085663A
公开(公告)日：2004-03-18
申请号：JP2002243264
申请日：2002-08-23
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an anamorphic imaging element which constitutes an optical scanner used for image forming devices, such as digital copying machines and laser printers, and which can suppress the deterioration, such as optical axis misalignment, due to the fluctuation in environmental temperatures as far as possible. SOLUTION: The anamorphic imaging element constitutes an optical system for forming line images near a deflection reflecting surface of an optical deflector possessed by the optical scanner, in which the anamorphic imaging element 3 is bonded and fixed at its end in the direction of weaker power of a horizontal scanning direction and a vertical scanning direction to a base 100 by an adhesive 110. COPYRIGHT: (C)2004,JPO

10. 发明专利

JP2003322814A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2003322814A
公开(公告)日：2003-11-14
申请号：JP2002129741
申请日：2002-05-01
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , HAYASHI YOSHIAKI , MIYATAKE NAOKI
IPC分类号： B41J2/44 , G02B13/00 , G02B13/18 , G02B26/10 , G02B26/12 , H04N1/036 , H04N1/113
CPC分类号： G02B26/123
摘要： PROBLEM TO BE SOLVED: To restrain the fluctuation of a beam pitch caused by the fluctuation of ambient temperature even in the case of using a resin lens as a scanning lens by using the resin lens having the power of an opposite sign to the scanning lens in an optical system before a deflector. SOLUTION: A plurality of beams emitted from a light source 1 are coupled to be in a desired beam state by a coupling lens 2, and made incident on the resin lens 10. The incident surface 10a of the lens 10 has spherical shape having negative power, and the emitting surface 10b thereof is a cylindrical surface having negative power only in a subscanning direction. Next, the beam is transmitted through the resin lens 11 having negative power only in the subscanning direction, made incident on a glass toroidal lens 12, and made incident on the light deflector 5, then the beam deflected by the deflector 5 forms an image while correcting the curvature of field in a main scanning direction and the subscanning direction respectively by a 3rd optical system, and while securing the desired beam pitch in the subscanning direction on the surface to be scanned 7. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：即使在使用树脂透镜作为扫描透镜的情况下，为了抑制由环境温度的波动引起的光束间距的波动，通过使用具有相反符号的功率的树脂透镜在偏转器之前在光学系统中扫描透镜。解决方案：从光源1发射的多个光束通过耦合透镜2耦合到期望的光束状态，并入射到树脂透镜10上。透镜10的入射表面10a具有球形具有负功率，并且其发射表面10b是仅在副扫描方向上具有负功率的圆柱形表面。接下来，光束仅通过具有负电源的树脂透镜11被传输入入到玻璃环形透镜12上并入射到光偏转器5上，然后由偏转器5偏转的光束形成图像，同时通过第三光学系统分别校正主扫描方向和副扫描方向上的曲率，并且在待扫描表面上确保所述副扫描方向上的期望光束间距。（C）2004年， JPO

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