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    • 11. 发明授权
    • Zoom lens
    • 变焦镜头
    • US06510008B1
    • 2003-01-21
    • US09870985
    • 2001-06-01
    • Yuji MiyauchiTetsuhide Takeyama
    • Yuji MiyauchiTetsuhide Takeyama
    • G02B1514
    • G02B15/173
    • A zoom lens includes, in order from the object side, a first lens unit with positive refracting power, a second lens unit with negative refracting power, a third lens unit with positive refracting power, and a fourth lens unit with positive refracting power. At least, the second lens unit and the fourth lens unit are moved along the optical axis to change spaces between individual lens units, and thereby the magnification of the zoom lens is changed in the range of the wide-angle position to the telephoto position. In this case, the third lens unit has three positive lens elements and one negative lens element located at the most image-side position.
    • 变焦透镜从物体依次包括具有正折射率的第一透镜单元,具有负折射力的第二透镜单元,具有正折射率的第三透镜单元和具有正折射率的第四透镜单元。 至少,第二透镜单元和第四透镜单元沿着光轴移动以改变各个透镜单元之间的空间,从而在广角位置与远摄位置的范围内改变变焦透镜的放大率。 在这种情况下,第三透镜​​单元具有位于最图像侧位置的三个正透镜元件和一个负透镜元件。
    • 12. 发明授权
    • Viewing optical system and image display apparatus using the same
    • 观看光学系统和使用其的图像显示装置
    • US06396639B1
    • 2002-05-28
    • US09540879
    • 2000-03-31
    • Takayoshi ToginoTetsuhide Takeyama
    • Takayoshi ToginoTetsuhide Takeyama
    • G02B2712
    • G02B17/086G02B5/30G02B17/0816G02B17/0832G02B17/0848G02B25/001G02B27/0172G02B2027/011G02B2027/0116G02B2027/0118G02B2027/0132G02B2027/0178
    • A compact, bright and high-performance viewing optical system and an image display apparatus using the same. The viewing optical system uses an ocular optical system, which is formed from a decentered prism, and a reflection type image display device. The image display device has a light source and an illuminating light guide prism for guiding a light beam from the light source so that the light beam is applied to the display surface from the front side thereof. The ocular optical system includes a prism having an entrance surface through which a light beam reflected from the display surface enters the prism after passing through the illuminating light guide prism. The prism further has a reflecting surface and an exit surface through which the light beam exits from the prism. The reflecting surface is decentered with respect to the optical axis and has a rotationally asymmetric curved surface configuration that corrects decentration aberrations due to the decentration of the reflecting surface and gives a power to the light beam. The spacing between the entrance surface of the prism and the display surface satisfies a predetermined condition to lead the image to the pupil position.
    • 紧凑,明亮,高性能的观察光学系统和使用其的图像显示装置。 观察光学系统使用由偏心棱镜形成的眼睛光学系统和反射型图像显示装置。 图像显示装置具有用于引导来自光源的光束的光源和照明光导棱镜,使得光束从其前侧施加到显示表面。 眼睛光学系统包括具有入射表面的棱镜,从显示表面反射的光束在通过照明导光棱镜之后进入棱镜。 棱镜还具有反射表面和光束从棱镜离开的出射表面。 反射表面相对于光轴偏心,并且具有旋转非对称的曲面构型,其校正由于反射表面的偏心引起的偏心像差,并向光束提供电力。 棱镜的入射面与显示面之间的间隔满足规定的条件,将图像引导到光瞳位置。
    • 15. 发明授权
    • Observation optical system using volume hologram
    • 观察光学系统使用体积全息图
    • US06961162B2
    • 2005-11-01
    • US10865830
    • 2004-06-14
    • Tohru NakamuraTetsuhide Takeyama
    • Tohru NakamuraTetsuhide Takeyama
    • G02B5/04G02B5/32G02B17/08G02B25/00G02B27/00G02B27/01G02B27/02G09F9/00H04N5/225H04N5/64H04N7/18
    • G02B27/017G02B27/0172G02B2027/0132G02B2027/0178
    • An observation optical system comprises an image display element 5 and an eyepiece optical system which introduces an image formed by the image display element 5 to a center of an eye of an observer without forming an intermediate image, so as to allow the observer to observe the image as a virtual image. The eyepiece optical system is constructed and arranged to bend the optical axis using reflecting surfaces so as to be compact. The optical axis lies in a plane, with respect to which the optical system is formed symmetric. The optical system includes a prism 3 having an entrance surface 33, a plurality of curved reflecting surfaces 31, 32 and an exit surface 31. The reflecting surface 32 is provided with a volume hologram (HOE) 4. Whereby, it is possible to provide an image observation optical system which can be made compact enough to be usable as an image display unit for a cellular phone or a portable intelligent terminal, and which can achieve high image definition and wide field angle while controlling chromatic aberration of magnification to be small.
    • 观察光学系统包括图像显示元件5和目镜光学系统,其将由图像显示元件5形成的图像引入观察者的眼睛的中心而不形成中​​间图像,以便观察者观察 图像作为虚拟图像。 目镜光学系统被构造和布置成使用反射表面使光轴弯曲以致于紧凑。 光轴位于相对于光学系统对称的平面中。 光学系统包括具有入射表面3 3/3的多个棱镜3,多个弯曲的反射表面3 1,3 2 3和出射表面 3< 1>。 反射面3< 2>具有体积全息图(HOE)4。由此,可以提供一种图像观察光学系统,其可以制成足够小以用作图像显示单元 蜂窝电话或便携式智能终端,并且可以在将倍率的色差控制得小的同时实现高图像清晰度和宽视场角。
    • 16. 发明授权
    • Variable optical element, optical unit, and image capturing device
    • 可变光学元件,光学单元和图像捕获装置
    • US06934090B2
    • 2005-08-23
    • US10822132
    • 2004-04-12
    • Toshiyuki NagaokaTetsuhide Takeyama
    • Toshiyuki NagaokaTetsuhide Takeyama
    • G02B15/00G02B1/06G02B3/14G02B26/02G02B9/00G02B7/02
    • G02B3/14A61B1/0019G02B26/005
    • A variable optical element is formed by a first liquid member, a second liquid member which is unsoluble in the first liquid member, a container which contains the first liquid member and the second liquid member, an index for positioning the variable optical element according to a predetermined reference. In the variable optical element, an interfacial shape between the first liquid and the second liquid surface varies according to a voltage which is applied to the liquid members, and the index is disposed such that a wave front aberration in the variable optical element should be minimum or fewer than a predetermined value under condition that the variable optical element is positioned according to the predetermined reference. By doing this, it is possible to restrict the wave front aberration which is caused by a gravity in the variable optical element, the optical unit, and the image capturing device.
    • 可变光学元件由第一液体部件,不溶于第一液体部件的第二液体部件,容纳第一液体部件和第二液体部件的容器构成,根据 预定参考。 在可变光学元件中,第一液体和第二液面之间的界面形状根据施加到液体部件的电压而变化,并且指数被设置为使得可变光学元件中的波前像差应当为最小 或者在可变光学元件根据预定参考定位的条件下小于预定值。 通过这样做,可以限制由可变光学元件,光学单元和图像捕获装置中的重力引起的波前像差。
    • 18. 发明授权
    • Observation optical system
    • 观察光学系统
    • US06710902B2
    • 2004-03-23
    • US10120832
    • 2002-04-12
    • Tetsuhide Takeyama
    • Tetsuhide Takeyama
    • G03H100
    • G02B27/0081G02B5/32G02B27/0172G02B2027/011G02B2027/0132G02B2027/0174G02B2027/0178
    • An observation optical system includes an image display element, a relay optical system having a plurality of lenses 4 and a first reflection-type volume hologram element (HOE), and an eyepiece optical system having a second reflection-type HOE. The observation optical system is arranged along the face to the side head of the observer. The first reflection-type HOE has a power and is configured to compensate for chromatic aberrations. The plurality of lenses is configured to compensate for decentered aberrations and chromatic aberrations. The second reflection-type HOE is a configured to exert power on bundles of rays and to compensate for chromatic aberrations. A light-transmitting plate is sandwiched between the first reflection-type HOE and the second refection-type HOE.
    • 观察光学系统包括图像显示元件,具有多个透镜4和第一反射型体积全息元件(HOE)的中继光学系统以及具有第二反射型HOE的目镜光学系统。 观察光学系统沿着观察者的侧面布置。 第一反射型HOE具有功率并被配置为补偿色差。 多个透镜被配置为补偿偏心像差和色像差。 第二反射型HOE被配置为对束束施加功率并补偿色差。 透光板夹在第一反射型HOE和第二反射型HOE之间。
    • 20. 发明授权
    • Optical system and device using the same
    • 光学系统和使用它的设备
    • US06621606B2
    • 2003-09-16
    • US10186677
    • 2002-07-02
    • Tetsuhide TakeyamaYasuyuki OhyagiDaijiro Kodama
    • Tetsuhide TakeyamaYasuyuki OhyagiDaijiro Kodama
    • G02B532
    • G02B5/32G02B27/0172G02B2027/011G02B2027/0132G02B2027/0138G02B2027/0178
    • The invention relates to a viewing and an image pickup optical system for display devices, which can be used with high efficiency at a plurality of wavelengths and enables bright images to be viewed with satisfactory color reproducibility. The optical system comprises a first prism 3, a second prism 4 and a volume hologram element 6 disposed between them and cemented to them. The hologram element 6 comprises a first grating vector corresponding to at least a first wavelength and a second grating vector corresponding to a second wavelength shorter than the first wavelength. As the light beam comprising the first and second wavelengths passes through the hologram element 6, the component of the first wavelength transmits at a given angle of incidence in a region between a first &lgr;&thgr; continuous curved region in which the diffraction efficiency is 10% or greater as determined form the first grating vector and a second &lgr;&thgr; continuous curved region in which the diffraction efficiency is 10% or greater as determined from the second grating vector, and the component of the second wavelength transmits at a given angle of incidence in a region on a shorter wavelength side with respect to the 2 &lgr;&thgr; continuous curved region.
    • 本发明涉及用于显示装置的观看和摄像光学系统,其可以以多个波长的高效率使用,并且能够以令人满意的颜色重现性观看明亮的图像。 光学系统包括第一棱镜3,第二棱镜4和布置在它们之间并与其粘合的体积全息元件6。 全息元件6包括对应于至少第一波长的第一光栅矢量和对应于比第一波长短的第二波长的第二光栅矢量。 当包含第一和第二波长的光束穿过全息元件6时,第一波长的分量以其中衍射效率为10%或更大的第一平坦连续弯曲区域之间的区域以给定的入射角透射 如从第二光栅矢量确定的衍射效率为10%或更大的第一光栅矢量和第二兰氏连续弯曲区域确定的,并且第二波长的分量以给定的入射角在 相对于2条连续弯曲区域的波长较短的一侧。