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    • 34. 发明授权
    • Upconversion fiber laser apparatus
    • 上转换光纤激光装置
    • US06320885B1
    • 2001-11-20
    • US09389378
    • 1999-09-03
    • Kiyoyuki KawaiRitsuo YoshidaKen ItouHideaki Okano
    • Kiyoyuki KawaiRitsuo YoshidaKen ItouHideaki Okano
    • H01S330
    • H01S3/09415H01S3/07H01S3/094011H01S3/094015H01S3/094042H01S3/094092H01S3/094096H01S3/1608H01S3/1616H01S5/146
    • In an up-conversion laser using Tm, blue light having a wavelength of 450 nm and blue light having a wavelength of 480 nm are outputted simultaneously. A high output is enabled with a high efficiency, and a green up-conversion laser is also realized by a similar means. A hybrid fiber laser apparatus includes a light source which outputs light near a wavelength A, and comprises a means for reflecting light near the wavelength A, which is provided at another end of the optical fiber, thereby to form an optical resonator for the wavelength A. In this hybrid fiber laser apparatus, an up-conversion fiber is provided in the optical resonator for the wavelength A, and optical resonator structures for a wavelength B constructed by reflection means and for a wavelength B are respectively provided at two positions at both ends of the up-conversion fiber. Of the two reflection means, the reflection means in the laser diode chip side is arranged so as to achieve high reflection, and the other reflection means in the other end side is arranged so as to achieve partial reflection, thereby to obtain output light having a wavelength B from the partial reflection side.
    • 在使用Tm的上转换激光中,同时输出波长为450nm的蓝色光和波长为480nm的蓝色光。 高效率地实现了高输出,并且通过类似的方式也实现了绿色上转换激光器。 混合光纤激光装置包括输出波长A附近的光的光源,并且包括用于反射靠近波长A的光的装置,该装置设置在光纤的另一端,从而形成用于波长A的光谐振器 在该混合光纤激光装置中,在波长A的光谐振器中设置有上变频光纤,由反射装置和波长B构成的波长B的光谐振器结构分别设置在两端的两个位置 的上转换光纤。 在两个反射装置中,激光二极管芯片侧的反射装置被布置成实现高反射,并且另一端侧的另一反射装置被布置成实现部分反射,从而获得具有 来自部分反射侧的波长B.
    • 35. 发明授权
    • Imaging lens and imaging apparatus
    • 成像镜头和成像设备
    • US08576499B2
    • 2013-11-05
    • US13285567
    • 2011-10-31
    • Hideaki Okano
    • Hideaki Okano
    • G02B3/02G02B13/18G02B9/34
    • G02B9/34G02B13/004
    • An imaging lens includes: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power which is formed in a concave shape on both sides thereof; a third lens having a positive refractive power which is formed in a meniscus shape in which a concave surface is directed toward the side of an object; and a fourth lens having a negative refractive power in which a convex surface is directed toward the object side, which are sequentially disposed from the object side to the image side, wherein the imaging lens satisfies the following conditional expressions (1), (2), (3) and (4): 0.40 25.  (4)
    • 成像透镜包括:孔径光阑; 具有正屈光力的第一透镜; 具有在其两侧形成为凹形的负屈光力的第二透镜; 具有正屈光力的第三透镜,其形成为弯曲面形状,其中凹面指向物体的侧面; 和(1),(2)所述的成像透镜,其中,所述成像透镜具有从物体侧朝向像侧依次配置的凸面朝向物体侧的负屈光力的第四透镜, ,(3)和(4):0.40 4)
    • 36. 发明申请
    • IMAGING LENS AND IMAGING APPARATUS
    • 成像镜头和成像设备
    • US20120147249A1
    • 2012-06-14
    • US13302655
    • 2011-11-22
    • Hideaki Okano
    • Hideaki Okano
    • H04N5/225G02B9/34
    • G02B13/004
    • An imaging lens includes: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power which is formed in a concave shape on both sides thereof; a third lens having a positive refractive power which is formed in a meniscus shape in which a concave surface is directed toward the side of an object; and a fourth lens having a negative refractive power in which a convex surface is directed toward the object side, which are sequentially disposed from the object side to the image side, wherein the imaging lens satisfies the following conditional expressions (1), (2), (3), (4) and (5): 0.40 25.  (5)
    • 成像透镜包括:孔径光阑; 具有正屈光力的第一透镜; 具有在其两侧形成为凹形的负屈光力的第二透镜; 具有正屈光力的第三透镜,其形成为弯曲面形状,其中凹面指向物体的侧面; 和(1),(2)所述的成像透镜,其中,所述成像透镜具有从物体侧朝向像侧依次配置的凸面朝向物体侧的负屈光力的第四透镜, ,(3),(4)和(5):0.40 25。 (5)
    • 37. 发明授权
    • Image pickup lens and image pickup apparatus
    • 图像拾取镜头和图像拾取装置
    • US07965455B2
    • 2011-06-21
    • US12458777
    • 2009-07-22
    • Hideaki Okano
    • Hideaki Okano
    • G02B9/34
    • G02B13/004G02B9/34G03B29/00
    • An image pickup lens includes, in order from an object side to an image side, an aperture stop, a first lens element having a positive refractive power, a second lens element having a negative refractive power and a biconcave shape, a third lens element having a positive refractive power and a meniscus shape whose concave surface faces the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied, 0.20 25 where f denotes the focal length of the entire lens system, f2 denotes the focal length of the second lens element, νd1 denotes the Abbe number of the first lens element, and νd2 denotes the Abbe number of the second lens element.
    • 图像拾取透镜从物体侧到像侧依次包括孔径光阑,具有正折光力的第一透镜元件,具有负折光力的第二透镜元件和双凹面形状,第三透镜​​元件具有 凹面朝向物体侧的正屈光力和弯液面形状,以及具有负屈光力的第四透镜元件。 在图像拾取透镜中,满足以下条件表达式:0.20 25其中f表示整个透镜系统的焦距,f2表示 第二透镜元件,d1表示第一透镜元件的阿贝数,&ngr; d2表示第二透镜元件的阿贝数。
    • 38. 发明申请
    • OPTICAL DISC DEVICE
    • 光盘设备
    • US20080212418A1
    • 2008-09-04
    • US12022953
    • 2008-01-30
    • Kazuhiro NagataKatsuo IwataHideaki Okano
    • Kazuhiro NagataKatsuo IwataHideaki Okano
    • G11B7/00
    • G11B7/13925G11B19/12G11B2007/0013
    • According to one embodiment, an optical head device provides a signal processing circuit which sets a control amount to move an objective lens so that a distance between the objective lens and a given recording layer of the an optical disc coincides with a focal position, an optical path length correction mechanism which corrects an influence of an aberration component producing an error in the focal distance, a thickness difference detection circuit which finds an amount of correction to be made by the optical path length, and an aberration correction circuit which generates a correction signal to correct the influence of the aberration component producing the error in the focal distance detected by the thickness difference detection circuit, and supplies the correction signal to the optical path length correction mechanism.
    • 根据一个实施例,光学头装置提供信号处理电路,其设置控制量以移动物镜,使得物镜与光盘的给定记录层之间的距离与焦点位置一致,光学 路径长度校正机构,其校正产生焦距误差的像差分量的影响;求出由光程长度求出的校正量的厚度差检测电路;以及产生校正信号的像差校正电路 以校正产生由厚度差检测电路检测的焦距的误差的像差分量的影响,并将校正信号提供给光路长度校正机构。