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公开(公告)号：US20170299860A1
公开(公告)日：2017-10-19
申请号：US15097646
申请日：2016-04-13
CPC分类号： G02B27/0081 , G02B3/0062 , G02B3/04 , G02B6/0026 , G02B6/003 , G02B26/101 , G02B27/0172 , G02B2027/0118 , G02B2027/0123 , G02B2027/0125 , G02B2027/0174
摘要： A near eye or heads up display system includes a scan beam projector engine, an optical waveguide, and an exit pupil expander (EPE) optically coupled between the scan beam projector engine and the optical waveguide. The EPE improves the optical performance of the display system. The EPE could include a diffusive optical element, diffractive optical element, micro-lens array (MLA), or relay of aspherical lenses. A dual MLA EPE may have cells that prevent cross-talk between adjacent pixels. A dual MLA EPE may have a non-periodic lens array. The optical power of one MLA may be different from the other MLA.
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2.发明授权Image projector and an illuminating unit suitable for use in an image projector 失效图像投影机和适用于图像投影机的照明单元公开(公告)号：US08690341B2
公开(公告)日：2014-04-08
申请号：US13203834
申请日：2010-02-18
申请人： Tuomas Vallius
发明人： Tuomas Vallius
IPC分类号： G03B21/26
CPC分类号： G02B27/1086 , G02B27/102 , G03B21/204 , G03B21/2093 , G03B33/06 , G03B33/12 , H04N9/3161
摘要： An image display device having an RGB illuminating module that includes a diffractive beam combiner. The diffractive beam combiner includes a first light source arranged to provide a first light beam having red color and a second light source arranged to provide a second light beam having green color. A centerline of the first light beam and a centerline of the second light beam are arranged to intersect at an intersection point. A diffractive output grating is located in the vicinity of the intersection point. The diffractive output grating is arranged to form an output light beam by diffracting light of the first light beam and light of the second light beam substantially in the same direction.
摘要翻译： 具有包括衍射光束组合器的RGB照明模块的图像显示装置。 衍射光束组合器包括布置成提供具有红色的第一光束的第一光源和布置成提供具有绿色的第二光束的第二光源。 第一光束的中心线和第二光束的中心线布置成在交点处相交。 衍射输出光栅位于交点附近。 衍射输出光栅被布置成通过使第一光束的光和基本上沿相同方向的第二光束的光衍射而形成输出光束。
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公开(公告)号：US20130321900A1
公开(公告)日：2013-12-05
申请号：US13991126
申请日：2011-12-01
IPC分类号： G02B5/18
CPC分类号： G02B5/1861 , G02F1/3551 , G02F1/3558 , H01S3/109 , H01S5/0092 , H01S5/02248 , H01S5/0615 , H01S5/14 , H01S5/18 , H01S5/4093
摘要： A device including a combination of a waveguide and a grating arranged to provide a spectral reflectance. The grating has a plurality of diffractive features in a first region and in a second region such that in the first region, a local average of a length of a period of the diffractive features substantially increases with increasing distance from an origin, and in the second region, the local average of the length of the period of the diffractive features substantially decreases with increasing distance from an origin. The origin is located at an end of the device.
摘要翻译： 包括布置成提供光谱反射率的波导和光栅的组合的装置。 光栅在第一区域和第二区域中具有多个衍射特征，使得在第一区域中，衍射特征的周期的长度的局部平均值随着与原点的距离的增加而显着增加，并且在第二区域中 区域，衍射特征的周期长度的局部平均值随着与原点的距离的增加而显着减小。 原点位于设备的末端。
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4.发明申请METHOD FOR DESIGNING A DIFFRACTION GRATING STRUCTURE AND A DIFFRACTION GRATING STRUCTURE 审中-公开衍射衍射结构和衍射结构的设计方法公开(公告)号：US20110038049A1
公开(公告)日：2011-02-17
申请号：US12528346
申请日：2007-02-23
申请人： Tuomas Vallius , Juha Pietarinen , Pasi Laakkonen
发明人： Tuomas Vallius , Juha Pietarinen , Pasi Laakkonen
CPC分类号： G02B5/1809
摘要： According to the present invention, the method for designing a diffraction grating structure (1), the grating period (d) of the structure comprising at least two grating lines each consisting of a pair of adjacent pillars (2) and grooves (3), comprises the steps of—determining desired diffraction efficiencies ηd of the diffraction orders, and—dimensioning the pillars (2) and grooves (3) so that when calculating for each pillar, on the basis of the effective refractive index neff for the fundamental wave mode propagating along that pillar, the phase shift Φ experienced by light propagated through the grating structure, the differences in the calculated phase shifts between adjacent pillars corresponds to the phase profile Φr required by the desired diffraction efficiencies.
摘要翻译： 根据本发明，用于设计衍射光栅结构（1）的方法，包括由一对相邻柱（2）和凹槽（3）组成的至少两个光栅线的结构的光栅周期（d） 包括以下步骤：确定衍射级的期望的衍射效率和等级，以及确定柱（2）和凹槽（3）的尺寸，使得当基于每个柱计算时，基于基波的有效折射率neff 沿着该支路传播的波模，通过光栅结构传播的光所经受的相移Φ，相邻柱之间计算的相移的差异对应于期望的衍射效率所需的相位分布Φr。
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公开(公告)号：US20170139210A1
公开(公告)日：2017-05-18
申请号：US14942408
申请日：2015-11-16
申请人： Tuomas Vallius
发明人： Tuomas Vallius
CPC分类号： G02B27/0172 , G02B5/1842 , G02B6/0026 , G02B6/005 , G02B27/0081 , G02B27/18 , G02B27/286 , G02B27/4211 , G02B27/4261 , G02B2027/0116 , G02B2027/0118 , G02B2027/012 , G02B2027/0125
摘要： In a near-eye optical display system comprising a waveguide and diffractive optical elements (DOEs) configured for in-coupling, exit pupil expansion, and out-coupling, a rainbow phenomenon manifested in the display may be removed or reduced using a polarizing filter at the front of the system so that real-world/stray light entering the system has a particular polarization state, for example TM-polarized. The polarizing filter is utilized in conjunction with a downstream out-coupling DOE that includes diffractive grating structures that are configured to enable sensitivity to an opposite polarization state, for example TE-polarized. An imager is configured to produce virtual-world images that also have a TE-polarized state. The polarization-sensitive out-coupling DOE diffracts the TE-polarized imaging beam out of the grating for display while the TM-polarized light from the real world and/or stray light passes through the grating without diffraction and thus cannot contribute to rainbows in the display.
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6.发明申请公开(公告)号：US20130314766A1
公开(公告)日：2013-11-28
申请号：US13991099
申请日：2011-12-01
IPC分类号： G02F1/355
CPC分类号： G02B5/1861 , G02F1/3551 , G02F1/3558 , H01S3/109 , H01S5/0092 , H01S5/02248 , H01S5/0615 , H01S5/14 , H01S5/18 , H01S5/4093
摘要： A nonlinear crystal includes a plurality of poled zones implemented in a nonlinear material. The crystal has a first region and a second region. In the first region, the local average of a length of a period of the poled zones substantially increases with increasing distance from an origin. In the second region, the local average of the length of the period of the poled zones substantially decreases with increasing distance from the origin. The origin is located at an end of the crystal.
摘要翻译： 非线性晶体包括以非线性材料实现的多个极化区域。 晶体具有第一区域和第二区域。 在第一个地区，随着与原产地的距离的增加，极化区域的一段时间的局部平均值显着增加。 在第二个地区，随着与原产地的距离的增加，极化区域的时间长度的局部平均值显着下降。 原点位于晶体的末端。
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公开(公告)号：US20170299865A1
公开(公告)日：2017-10-19
申请号：US15097929
申请日：2016-04-13
申请人： Tuomas Vallius , Jani Tervo , Pasi Pietila
发明人： Tuomas Vallius , Jani Tervo , Pasi Pietila
CPC分类号： G02B27/0172 , G02B6/0016 , G02B6/0035 , G02B27/0081 , G02B27/4205 , G02B2027/0123 , G02B2027/0125 , G02B2027/0174
摘要： An apparatus for use in replicating an image associated with an input-pupil to an output-pupil, comprises an optical waveguide including input-coupler, one or more intermediate-components and an output-coupler. The input-coupler couples light corresponding to the image into the optical waveguide and diffracts the light corresponding to the image in at least two different directions so that light corresponding to the image is diffracted toward each of the one or more intermediate-components. The intermediate-component(s) is/are configured to individually or collectively perform both odd-order pupil expansion and even-order pupil expansion on light corresponding to the image that travels from the input-coupler to the one or more intermediate-components by way of TIR, and diffract the light corresponding to the image towards the output-coupler. The output-coupler is configured to couple the light corresponding to the image out of the optical waveguide so that the light corresponding to the image is viewable from the output-pupil.
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公开(公告)号：US20170131546A1
公开(公告)日：2017-05-11
申请号：US14936973
申请日：2015-11-10
申请人： Scott Woltman , Steven John Robbins , R. Andrew Wall , Tuomas Vallius , Tapani Levola , Pasi Kostamo
发明人： Scott Woltman , Steven John Robbins , R. Andrew Wall , Tuomas Vallius , Tapani Levola , Pasi Kostamo
CPC分类号： G02B27/0101 , G02B5/1866 , G02B6/0016 , G02B6/0038 , G02B6/0056 , G02B27/0081 , G02B27/0103 , G02B27/4205 , G02B2027/0118 , G02B2027/0123 , G02B2027/0125
摘要： An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide. In certain embodiments, one or more of the input-coupler, the intermediate-component or the output-coupler comprises a liquid crystal polymer (LCP) based surface relief grating (SRG) or a double-side diffractive optical element (DOE), each of which can be used to improve an intensity distribution of light output by the output-coupler.
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9.发明申请公开(公告)号：US20170031171A1
公开(公告)日：2017-02-02
申请号：US14813305
申请日：2015-07-30
申请人： Tuomas Vallius , Lauri Sainiemi
发明人： Tuomas Vallius , Lauri Sainiemi
CPC分类号： G02B27/4205 , G02B5/1819 , G02B6/34 , G02B27/0172 , G02B27/0944 , G02B2027/0125 , G02B2027/0178
摘要： In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), one or more of the DOEs is configured with gratings that have varying depth and varying directions for depth modulation, in which the modulation direction is aligned with the steepest change (i.e., slope) of grating depth. Depth modulation direction may change at a point of transition between different regions in the DOE. For example, with a zero axis being defined along a line parallel to a long side of a DOE, the depth modulation direction can change from a negative angle, with respect to the axis in the plane of the waveguide in one region, to a positive angle in another region, or vice versa. By varying depth modulation direction in a DOE, display uniformity in the optical display system may be increased.
摘要翻译： 在包括具有多个衍射光学元件（DOE）的波导的光学显示系统中，一个或多个DOE被配置为具有用于深度调制的变化深度和变化方向的光栅，其中调制方向与最陡峭的变化对准 （即斜率）。 深度调制方向可能在DOE中的不同区域之间的转变点处改变。 例如，沿着与DOE的长边平行的线定义零轴，深度调制方向可以相对于在一个区域中的波导的平面中的轴线的负角度变为正的 角度在另一个区域，反之亦然。 通过在DOE中改变深度调制方向，可以增加光学显示系统中的显示均匀性。
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公开(公告)号：US20170003505A1
公开(公告)日：2017-01-05
申请号：US14790379
申请日：2015-07-02
申请人： Tuomas Vallius , Lauri Sainiemi
发明人： Tuomas Vallius , Lauri Sainiemi
摘要： In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), gratings in one or more of the DOEs may have an asymmetric profile in which gratings may be slanted or blazed. Asymmetric gratings in a DOE can provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. Banding may be more pronounced when polymeric materials are used in volume production of the DOEs to minimize system weight, but which have less optimal optical properties compared with other materials such as glass. The asymmetric gratings can further enable the optical system to be more tolerant to variations—such as variations in thickness, surface roughness, and grating geometry—that may not be readily controlled during manufacturing particularly since such variations are in the submicron range.
摘要翻译： 在包括具有多个衍射光学元件（DOE）的波导的光学显示系统中，一个或多个DOE中的光栅可以具有不对称轮廓，其中光栅可以倾斜或闪耀。 DOE中的不对称光栅可以通过减少由显示器中的暗条纹表现的光学干涉导致的“带状”，从而在光学显示系统中提供增加的显示均匀性。 当聚合物材料用于体积生产DOE以使系统重量最小化但与其他材料（例如玻璃）相比具有较低的最佳光学性能时，条带可能会更加显着。 不对称光栅可以进一步使得光学系统能够更宽容地变化，例如在厚度，表面粗糙度和光栅几何形状上的变化 - 这在制造过程中可能不容易控制，特别是因为这种变化在亚微米范围内。
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