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    • 7. 发明授权
    • Multi-layer achromatic liquid crystal polarization gratings and related fabrication methods
    • 多层消色差液晶偏振光栅及相关制作方法
    • US08305523B2
    • 2012-11-06
    • US12596176
    • 2008-04-16
    • Michael James EscutiChulwoo Oh
    • Michael James EscutiChulwoo Oh
    • G02B5/30
    • G02B5/1833G02B5/3016
    • A multi-layer polarization grating includes a first polarization grating layer, a second polarization grating layer on the first polarization grating layer, and a third polarization grating layer on the second polarization grating layer, such that the second polarization grating layer is between the first and third polarization grating layers. The second polarization grating layer has a periodic molecular structure that is offset relative to that of the first polarization grating layer along an interface therebetween. The third polarization grating layer may also have a periodic molecular structure that is offset relative to that of the second polarization grating layer along an interface therebetween. As such, the periodic molecular structures of the first and second polarization grating layers may be out of phase by a first relative angular shift, and the periodic molecular structures of the second and third polarization grating layers may be out of phase by a second relative angular shift. Related fabrication methods are also discussed.
    • 多层偏振光栅包括第一偏振光栅层,第一偏振光栅层上的第二偏振光栅层和第二偏振光栅层上的第三偏振光栅层,使得第二偏振光栅层在第一和第二偏振光栅层之间, 第三偏振光栅层。 第二偏振光栅层具有周期性的分子结构,其相对于第一偏振光栅层沿着它们之间的界面偏移。 第三偏振光栅层也可以具有相对于沿着它们之间的界面的第二偏振光栅层的周期性分子结构偏移。 这样,第一和第二偏振光栅层的周期性分子结构可以与第一相对角位移异相,并且第二和第三偏振光栅层的周期性分子结构可以与第二相对角度 转移。 还讨论了相关的制造方法。
    • 8. 发明申请
    • METHODS OF FABRICATING SWITCHABLE LIQUID CRYSTAL POLARIZATION GRATINGS ON REFLECTIVE SUBSTRATES AND RELATED DEVICES
    • 在反射基板上制作可切换液晶偏振光栅的方法及相关装置
    • US20100231847A1
    • 2010-09-16
    • US12596168
    • 2008-04-16
    • Michael James Escuti
    • Michael James Escuti
    • G02F1/13B05D5/06G03F7/00G03F7/20
    • G03H1/00G02B5/1833G02F1/1337G02F2001/133757G02F2201/305
    • A method of fabricating a switchable liquid crystal polarization grating includes creating a degenerate planar anchoring condition on a surface of a reflective substrate. An alignment layer may be formed on a transmissive substrate and may be patterned to create a periodic alignment condition therein. The transmissive substrate including the patterned alignment layer thereon may be assembled adjacent to the surface of the reflective substrate including the degenerate planar anchoring condition thereon to define a gap therebetween. A liquid crystal layer is formed on the surface of the reflective substrate including the degenerate planar alignment condition. The liquid crystal layer may be formed in the gap directly on the alignment layer such that molecules of the liquid crystal layer are aligned based on the periodic alignment condition in the alignment layer. Related fabrication methods and polarization gratings are also discussed.
    • 制造可切换液晶偏振光栅的方法包括在反射基板的表面上形成简并平面锚定状态。 取向层可以形成在透射基底上并且可以被图案化以在其中产生周期性取向条件。 包括其上的图案化取向层的透射基板可以与反射基板的表面相邻地组装,包括其上的简并平面锚固条件,以在其之间形成间隙。 在包括简并平面取向条件的反射基板的表面上形成液晶层。 液晶层可以直接形成在取向层上的间隙中,使得液晶层的分子基于取向层中的周期性取向条件而取向。 还讨论了相关的制造方法和偏振光栅。
    • 9. 发明授权
    • Optical scanning device
    • 光学扫描装置
    • US07170681B2
    • 2007-01-30
    • US10501422
    • 2002-12-18
    • Bernardus Hendrikus Wilhelmus Hendriks
    • Bernardus Hendrikus Wilhelmus Hendriks
    • G02B27/44
    • G02B5/1833G02B5/1876G11B7/1353G11B7/1367G11B7/1374G11B2007/0006G11B2007/13727
    • An optical scanning device (1) for scanning three information layer (2, 2′, 2″) with three respective radiation beams (4, 4′, 4″) having three respective wavelengths (λ1, λ2, λ3) and polarizations (p1, p2, p3). The three wavelengths differ from each other. At least one of the three polarizations differs from the others. The device comprises a diffractive part (24) including a pattern of pattern elements which have one stepped profile for forming three diffracted beams (15, 15′, 15″) from the three radiation beams, the part comprising birefringent material, sensitive to the three polarizations. The stepped profile is designed such that the heights (hj) of the steps of a pattern element introduce phase changes that equal at least two different multiples of 2π for one (λ1) of the three wavelengths and equal at least two different phase changes modulo 2π for one (λ2) of the two other wavelengths.
    • 一种光扫描装置(1),用于用具有三个相应波长(λ<1/2)的三个相应辐射束(4,4',4“)扫描三个信息层(2,2',2”) λ,λ2,λ3)和极化(p 1,p 2,p 3)。 三个波长彼此不同。 三个极化中的至少一个与其他极化不同。 该装置包括具有图形元件图案的衍射部分(24),该图形元件具有一个阶梯轮廓,用于从三个辐射束形成三个衍射光束(15,15',15“),该部分包括双折射材料 三极化。 阶梯轮廓被设计成使得图案元件的台阶的高度引入相位变化,相位变化等于两个不同倍数的2pi,一个(λ1 SUB / >),并且对于两个其它波长的一个(λ<2> 2 ),等于至少两个不同相位变化为2pi。
    • 10. 发明授权
    • Optical head device including an optically anisotropic diffraction grating and process for its production
    • 包括光学各向异性衍射光栅的光学头装置及其生产方法
    • US06271966B1
    • 2001-08-07
    • US09524742
    • 2000-03-13
    • Yuzuru TanabeTomoki GunjimaHiromasa SatoHiroki Hotaka
    • Yuzuru TanabeTomoki GunjimaHiromasa SatoHiroki Hotaka
    • G02B518
    • G11B7/1353G02B5/1833G11B7/22
    • An object is to provide an optical head device whereby the light utilization efficiency can be increased and which can be produced at a low cost. A glass substrate 1 having projections and recesses 2 formed by patterning a SiON type transparent thin film on its inner surface by dry etching, and a second glass substrate 3 having a polyimide film 4 formed as an alignment film on its inner surface, are laminated with a space, the periphery is sealed by a sealing material made of an epoxy resin 5, and liquid crystal 6 is injected under vacuum into the interior to form an optically anisotropic diffraction grating. On the outer surface of this second glass substrate 3, a quarter-wave film 7 is laminated, and a third glass substrate 9 is bonded by a photopolymer 8 to obtain a diffracting element 10. This diffracting element 10 is disposed between a light source and an optical recording medium to obtain an optical head device.
    • 本发明的目的是提供一种能够提高光利用效率并且可以以低成本生产的光学头装置.1。一种玻璃基板1,其具有通过在其内表面上图案化SiON型透明薄膜而形成的凸部和凹部2, 干法蚀刻,并且在其内表面上具有形成为取向膜的聚酰亚胺膜4的第二玻璃基板3层叠有空间,周边由环氧树脂5制成的密封材料密封,液晶6为 在真空下注入内部以形成光学各向异性衍射光栅。 在该第二玻璃基板3的外表面上层叠四分之一波长膜7,通过光聚合物8将第三玻璃基板9接合,得到衍射元件10.该衍射元件10配置在光源和 光学记录介质,以获得光学头装置。