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    • 1. 发明授权
    • Image readout lens and image readout apparatus using the same
    • 图像读出透镜和使用其的图像读出装置
    • US5936783A
    • 1999-08-10
    • US215140
    • 1998-12-18
    • Yoko NakaiHiromitsu Yamakawa
    • Yoko NakaiHiromitsu Yamakawa
    • G02B9/34G02B13/24
    • G02B9/34G02B13/24
    • A four-element lens configuration of positive, negative, positive, and negative satisfies predetermined conditional expressions, thereby correcting various kinds of aberration and achieving compactness and wider angle of view in a readout lens system. Further, without using an expensive glass material, higher image quality is attained. Successively from the object side, a first lens L.sub.1 made of a positive meniscus lens having a convex surface directed onto the object side, a second lens L.sub.2 made of a biconcave lens, a third lens L.sub.3 made of a biconvex lens, and a fourth lens L.sub.4 made of a negative meniscus lens having a convex surface directed onto the imaging surface side are arranged and configured so as to satisfy the following conditional expressions:-5.5
    • 正,负,正的四元件透镜结构满足预定的条件表达式,从而校正各种像差并实现读出透镜系统中的紧凑度和宽视角。 此外,在不使用昂贵的玻璃材料的情况下,可获得更高的图像质量。 从物体侧开始,由具有朝向物体侧的凸面的正弯月透镜制成的第一透镜L1,由双凸透镜构成的第二透镜L2,由双凸透镜构成的第三透镜L3和第四透镜 布置并配置具有指向成像面侧的凸面的负弯月形透镜的L4,以满足以下条件式:-5.5
    • 3. 发明授权
    • Objective optical system for optical recording media and optical pickup device using it
    • 用于光学记录介质的物镜光学系统和使用它的光学拾取装置
    • US07443779B2
    • 2008-10-28
    • US11019203
    • 2004-12-23
    • Yu KitaharaTetsuya OriToshiaki KatsumaMasao MoriHiromitsu Yamakawa
    • Yu KitaharaTetsuya OriToshiaki KatsumaMasao MoriHiromitsu Yamakawa
    • G11B7/00
    • G11B7/1367G11B7/1374G11B7/13922G11B2007/0006G11B2007/13727
    • An objective optical system includes a diffractive optical element on the light source side of an objective lens for focusing incident light of three different wavelengths with two different numerical apertures onto three different optical recording media. The diffractive optical element is formed of two lens elements made of different materials that are cemented together at a diffractive surface. Three conditions are satisfied so as to achieve optimum imaging. The diffractive surface may be shaped so that the order of the diffracted light of the shortest wavelength λ2 having the largest diffracted intensity is different from the order of the diffracted light of the second wavelength λ2 having the largest diffracted intensity, and the order of the diffracted light of the first wavelength λ1 having the largest diffracted intensity is also different from the order of the diffracted light of the third wavelength λ3 having the largest diffracted intensity.
    • 物镜光学系统包括在物镜的光源侧的衍射光学元件,用于将具有两个不同数值孔径的三种不同波长的入射光聚焦到三种不同的光记录介质上。 衍射光学元件由在衍射表面上胶合在一起的不同材料制成的两个透镜元件形成。 满足三个条件以实现最佳成像。 衍射表面可以被成形为使得具有最大衍射强度的最短波长λ1的衍射光的次序与具有最大衍射强度的第二波长λ2的衍射光的次序不同, 具有最大衍射强度的第一波长λ1的衍射光也与具有最大衍射强度的第三波长λ3的衍射光的顺序不同。
    • 4. 发明申请
    • Multiplexing optical system
    • 复用光学系统
    • US20070237455A1
    • 2007-10-11
    • US11639308
    • 2006-12-15
    • Shinichiro SonodaHiromitsu Yamakawa
    • Shinichiro SonodaHiromitsu Yamakawa
    • G02B6/32
    • G02B6/4206
    • A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens condenses laser beams transmitted through the collimator lenses in only one of a plane including the stripe width direction of the semiconductor lasers and a plane including a direction perpendicular to the stripe width direction. The second condensing lens condenses laser beams transmitted through the first condensing lens. The optical fiber is arranged in such a manner that the condensed laser beams enter the optical fiber. In the multiplexing optical system, an anamorphic lens is used as the second condensing lens, and the anamorphic lens condenses the laser beams in the two planes in cooperation with the first condensing lens.
    • 复用光学系统包括准直透镜,第一聚光透镜,第二聚光透镜和光纤。 准直透镜准直了从半导体激光器发射的发散激光束。 第一聚光透镜在仅包括半导体激光器的条宽度方向的平面和包括与条宽度方向垂直的方向的平面中的一个平面内聚焦透射准直透镜的激光束。 第二会聚透镜会聚合透过第一聚光透镜的激光束。 光纤以这样的方式配置,使得聚光的激光束进入光纤。 在多路复用光学系统中,使用变形透镜作为第二聚光透镜,并且变形透镜与第一聚光透镜协作地将激光束冷凝在两个平面中。
    • 7. 发明申请
    • Image scanning lens and image scanning device that uses same
    • 图像扫描镜头和使用相同的图像扫描装置
    • US20050180027A1
    • 2005-08-18
    • US11045364
    • 2005-01-31
    • Yoko YamamotoHiromitsu Yamakawa
    • Yoko YamamotoHiromitsu Yamakawa
    • G02B9/34G02B13/24G02B26/08
    • G02B9/34G02B13/24
    • An image scanning lens includes four lens components that may include five lens elements as follows: a first lens element having negative refractive power and a meniscus shape with its convex surface on the object side, a second lens element having positive refractive power and a meniscus shape with its convex surface on the object side, a stop, a third biconcave lens element cemented to a fourth biconvex lens element, and a fifth lens element having negative refractive power and a meniscus shape with its concave surface on the object side. The image scanning lens satisfies certain conditions related to the focal lengths of the first, second, and third lens components of the image scanning lens and to the anomalous dispersion of the second lens element. An image scanning device, such as an image scanner, with an image pickup device, such as a CCD, uses the image scanning lens.
    • 图像扫描透镜包括可以包括以下的五个透镜元件的四个透镜部件:具有负屈光力的第一透镜元件和在物体侧具有凸面的弯月形状,具有正折射力的第二透镜元件和弯月面形状 在其物体侧具有凸面,具有固定到第四双凸透镜元件的止挡件,第三双凹透镜元件和具有负屈光力的第五透镜元件和具有在物体侧上的凹面的弯液面形状。 图像扫描透镜满足与图像扫描透镜的第一,第二和第三透镜部件的焦距相关的特定条件以及第二透镜元件的异常色散。 诸如CCD的图像拾取装置的诸如图像扫描仪的图像扫描装置使用图像扫描透镜。
    • 8. 发明授权
    • Optical scanning apparatus
    • 光学扫描装置
    • US06559998B2
    • 2003-05-06
    • US09796274
    • 2001-02-28
    • Hiromitsu Yamakawa
    • Hiromitsu Yamakawa
    • G02B2608
    • G02B26/123
    • Provided is an optical scanning apparatus in which images are formed precisely on the target surface to be scanned with a plurality of beams and low manufacturing cost is realizes. The optical scanning apparatus comprises four light sources, each of which emits a beam, a collimator lens and a polygon mirror. Provided between the polygon mirror and the target surface, cylindrical mirrors to form images with beams on the respective target surfaces. The optical path, from the polygon mirror to the target surface, of the beams emitted from the light sources away from the optical axis of the collimator lens is shorter than the corresponding optical path of the beams emitted from the light sources close to the optical axis. Thus, even though the collimator lens has the curvature of field, all of the image spots formed with the beams are located just on the target surface.
    • 提供了一种光学扫描装置,其中图像精确地形成在待扫描的目标表面上,并且实现了低成本。 光学扫描装置包括四个光源,每个光源发射光束,准直透镜和多面镜。 在多面镜和目标表面之间提供圆柱形反射镜,以在各个目标表面上形成具有光束的图像。 从光源远离准直透镜的光轴发射的光束从多面镜到目标表面的光路比从靠近光轴的光源射出的光束的相应光路短 。 因此,即使准直透镜具有曲率场,由波束形成的所有图像点都位于目标表面上。
    • 9. 发明授权
    • Imaging lens and optical apparatus using the same
    • 成像透镜和使用其的光学装置
    • US5969883A
    • 1999-10-19
    • US247938
    • 1999-02-11
    • Hiromitsu YamakawaAkira Yabe
    • Hiromitsu YamakawaAkira Yabe
    • G02B9/34G02B13/18G02B13/24G02B3/06
    • G02B13/24G02B13/18G02B9/34
    • In an imaging lens suitable for image reading of a four-lens element configuration comprising, successively from the object side, positive, positive, negative, and positive lenses, at least one surface of the fourth lens is made aspherical, whereby lighter weight and lower cost are achieved, while various kinds of aberration are corrected. The four-lens element imaging lens comprises, successively from the object side, positive first and second lenses L.sub.1 and L.sub.2 each having a surface on the object side convex toward the object side, a negative third lens L.sub.3 having a surface on the image side concave toward the image side, and a positive fourth lens L.sub.4 having at least one aspheric surface.
    • 在适合于从物体侧依次由正面,正面,正面和正面透镜构成的四透镜元件配置的图像读取的成像透镜中,第四透镜的至少一个表面被制成非球面,由此更轻重量更低 实现成本,同时校正各种像差。 四透镜元件成像透镜从物体侧连续地包括在物体侧的朝向物体侧朝向凸面的正的第一透镜L1和第二透镜L2,具有在像侧凹面的表面的负的第三透镜L3 朝向图像侧,以及具有至少一个非球面的正的第四透镜L4。
    • 10. 发明授权
    • Optical beam scanner
    • 光束扫描仪
    • US5206755A
    • 1993-04-27
    • US770476
    • 1991-10-03
    • Hiromitsu Yamakawa
    • Hiromitsu Yamakawa
    • G02B26/12G02B27/00
    • G02B26/125G02B27/0031
    • An optical beam scanner capable of correcting irregularities in pitch of beam scanning as caused by inclination or angular deviations of reflective deflection surfaces of a deflector, the scanner including a first image-forming optical system arranged to form an image of a light beam from a light source linearly on or in the vicinity of a reflective deflection surface of a deflector, and a second image-forming optical system arranged to form an image of the deflected light beam from the deflector on a scanning surface. The second image-forming optical system is constituted, successively from the side of the deflector, by a first singular lens element provided with at least one toric surface and having positive refractive power in a plane of transverse main scan direction, and a second singular lens element provided with either a spherical or cylindrical surface and having negative refractive power in the plane of the main scan direction.
    • 一种光束扫描器,其能够校正由偏转器的反射偏转表面的倾斜或角度偏差引起的光束扫描的间距的不规则性,扫描仪包括第一成像光学系统,其布置成形成来自光的光束的图像 在偏转器的反射偏转表面上或其附近线性地源极;以及第二成像光学系统,布置成在扫描表面上形成来自偏转器的偏转光束的图像。 第二图像形成光学系统由偏转器一侧由设置有至少一个复曲面的第一奇异透镜元件构成,并且在横向主扫描方向的平面中具有正的折射能力,以及第二奇异透镜 元件设置有球形或圆柱形表面并且在主扫描方向的平面中具有负折射力。