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    • 5. 发明授权
    • Method for mass-producing eccentric Fresnel lens sheets
    • 批量生产偏心菲涅耳透镜片的方法
    • US5690772A
    • 1997-11-25
    • US268870
    • 1994-06-30
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • Hideaki MitsutakeNobuo MinouraKatsumi KurematsuHaruyuki Yanagi
    • G03B21/62G02B3/08B32B31/00
    • G02B3/08Y10T156/1052Y10T156/1057Y10T156/1069
    • A method for mass-producing eccentric Fresnel lens sheets comprising the steps of: preparing a number of concentric Fresnel lens sheets; dividing the concentric Fresnel lens sheets into a first set and a second set each including a plurality of Fresnel lens sheets; cutting out a plurality of first sheets each corresponding to one portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the first set; cutting out a plurality of second sheets each corresponding to the other portion of the eccentric Fresnel lens sheet from each of the Fresnel lens sheets of the second set; and bonding each of the first sheets and each of the second sheets in such a manner that patterns on the first sheet and the second sheet are continuous to prepare a plurality of eccentric Fresnel lens sheet. The second set can include a third set and a fourth set and a plurality of third sheets are cut out from the third set and a plurality of fourth sheets are cut out from the fourth set. The third sheets and fourth sheets are bonded to the first sheets. The first sheets are relatively large rectangular sheets and the second sheets are small rectangular sheets.
    • 一种批量生产偏心菲涅耳透镜片的方法,包括以下步骤:制备多个同心的菲涅尔透镜片; 将同心菲涅耳透镜片分成第一组和第二组,每组包括多个菲涅尔透镜片; 从第一组的菲涅耳透镜片中的每一个切出与偏心菲涅尔透镜片的一部分相对应的多个第一片; 从第二组的菲涅耳透镜片中的每一个切出与偏心菲涅耳透镜片的另一部分相对应的多个第二片; 并且以使得第一片材和第二片材上的图案连续的方式接合每个第一片材和每个第二片材以制备多个偏心菲涅尔透镜片材。 第二组可以包括第三组和第四组,并且从第三组切出多个第三片,并且从第四组切出多个第四片。 第三片和第四片结合到第一片。 第一片是相对大的矩形片,第二片是小矩形片。
    • 8. 发明授权
    • Multicolor projector employing diffraction grating type liquid crystal
light modulators
    • 采用衍射光栅型液晶光调制器的多色投影机
    • US5237435A
    • 1993-08-17
    • US644932
    • 1991-01-23
    • Katsumi KurematsuShigeru OshimaNobuo Minoura
    • Katsumi KurematsuShigeru OshimaNobuo Minoura
    • G02B27/54G02F1/13G02F1/1333G02F1/1335G02F1/29G09F9/00H04N5/74H04N9/31
    • H04N9/3105G02F1/1333G02F1/292G02F2001/133565
    • A projector capable of compactizing the structure and improving the efficiency of light utilization is disclosed. The projector has an illuminating system, a light modulation device and a projection optical system. A first and a second lights of mutually different colors are emitted from the illumination optical system. The light modulating device has a first light modulator for modulating the first light according to a first image signal and a second light modulator for modulating the second light according to a second image signal. Each of the first and second light modulators is provided with a grating, a liquid crystal filled in the grooves of the grating and a driver for driving the molecules of the liquid crystal. The driver is adapted to drive the molecules of the liquid crystal in such a manner that the liquid crystal and the grating have mutually substantially matching refractive indexes in a certain state but have mutually unmatched refractive indexes in another state, thereby generating or substantially erasing a diffraction grating by the grating and the liquid crystal. A first and a second images of mutually different colors are projected on a screen by the first and second lights from the first and second light modulators.
    • 公开了能够使结构紧凑化并提高光利用效率的投影仪。 该投影仪具有照明系统,光调制装置和投影光学系统。 从照明光学系统发射彼此不同颜色的第一和第二光。 光调制装置具有用于根据第一图像信号调制第一光的第一光调制器和用于根据第二图像信号调制第二光的第二光调制器。 第一和第二光调制器中的每一个设置有光栅,填充在光栅的凹槽中的液晶和用于驱动液晶分子的驱动器。 驱动器适于驱动液晶分子,使得液晶和光栅在某种状态下具有相互大致匹配的折射率,但在另一状态下具有相互无差的折射率,从而产生或基本上擦除衍射 通过光栅和液晶光栅。 相互不同颜色的第一和第二图像通过来自第一和第二光调制器的第一和第二光投影在屏幕上。