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公开(公告)号：US11733536B1
公开(公告)日：2023-08-22
申请号：US18004106
申请日：2021-07-05
发明人： Muyun Wang , Dongliang Zhang
CPC分类号： G02B27/4266 , G02B27/0012
摘要： A periodic optimization method for a diffractive optical element includes converting coordinates of individual target spots of a target spot array into angular spectrum coordinates, selecting an initial period, calculating diffraction orders of individual target spots, rounding the diffraction order, calculating the coordinates of actual projection spots by using the rounded diffraction orders, calculating evaluation indicator of period optimization, adjusting the period, and repeating the steps, and comparing the evaluation indicators to determine an optimal period for the diffractive optical element. With the periodic optimization method, an actual spot array is made to match a target spot array to the greatest possible extent with a small amount of calculations, thereby improving the design quality and accuracy of a diffractive optical element.
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2.发明公开公开(公告)号：US20230251500A1
公开(公告)日：2023-08-10
申请号：US17666717
申请日：2022-02-08
申请人： Goertek Inc.
发明人： Lingshan Li
CPC分类号： G02B27/44 , G02B27/4205 , G02B27/4266 , G02B27/0101 , G02B27/0172 , G02B5/1842 , G02B5/1814 , G06F17/11
摘要： A method of conical anisotropic rigorous coupled wave analysis for grating and a computing device are disclosed. The method comprises: obtaining a target geometric phase δ′g for the anisotropic-material-based grating; obtaining a slow axis azimuth angle ϕc(x) of the anisotropic-material-based grating according to the target geometric phase δ′g; obtaining a permittivity tensor of the anisotropic-material-based grating, wherein the anisotropic-material-based grating has an ordinary index no and an extraordinary index ne, the anisotropic-material-based grating has a slow axis polar angle θc and slow axis azimuth angle ϕc(x), and the permittivity tensor is based on no, ne, θc and ϕc(x); applying the permittivity tensor into Maxwell equations; obtaining electromagnetic field for the anisotropic-material-based grating by using boundary conditions of at least two layers or sublayers of the anisotropic-material-based grating and Maxwell equations for each layer or sublayer, to obtain a diffraction efficiency for the anisotropic-material-based grating.
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公开(公告)号：US09953402B2
公开(公告)日：2018-04-24
申请号：US15184592
申请日：2016-06-16
发明人： Iftach Klapp , David Mendlovic
CPC分类号： G06T5/003 , G02B26/06 , G02B27/0075 , G02B27/4266 , G02B27/46 , G06T2207/10004 , H04N5/2254 , H04N5/23232
摘要： An imaging device is presented for use in an imaging system capable of improving the image quality. The imaging device has one or more optical systems defining an effective aperture of the imaging device. The imaging device comprises a lens system having an algebraic representation matrix of a diagonalized form defining a first Condition Number, and a phase encoder utility adapted to effect a second Condition Number of an algebraic representation matrix of the imaging device, smaller than said first Condition Number of the lens system.
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公开(公告)号：US20140204463A1
公开(公告)日：2014-07-24
申请号：US14240393
申请日：2011-09-28
申请人： Ken Harada , Teruo Kohashi
发明人： Ken Harada , Teruo Kohashi
IPC分类号： G02B5/18
CPC分类号： G02B5/1876 , G02B27/42 , G02B27/4233 , G02B27/4266 , G02B27/44 , G21K1/06
摘要： Although, conventionally, there were two methods, (1) a wave was transmitted through a spiral phase plate and (2) a diffraction grating containing an edge dislocation was used, they incurred complication of a configuration and securement of a larger amount of space and were not efficient because each of the spiral wave generation methods needed an incident wave to be a plane wave and at least one time of imaging is necessary at the time of wave irradiation on an observation object. In order to efficiently generate the spiral wave having a sufficient intensity, a structure of edge dislocation is taken in into a pattern of the zone plate and a spiral pattern containing a discontinuous zone is formed. Moreover, a thickness and a quality of material that change the phase of the wave by an odd multiple of π are selected for a material of the wave-blocking section in the pattern.
摘要翻译： 虽然通常有两种方法：（1）通过螺旋相板传播波，（2）使用包含边缘位错的衍射光栅，它们引起配置的复杂化并确保更大的空间， 不是有效的，因为每个螺旋波产生方法需要入射波为平面波，并且在观察对象上的波照射时需要至少一次成像时间。 为了有效地产生具有足够强度的螺旋波，边缘位错的结构被取入到区域板的图案中，并且形成包含不连续区域的螺旋图案。 此外，将波的相位改变为奇数倍的材料的厚度和质量; 被选择为图案中的波形阻挡部分的材料。
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公开(公告)号：US20120163157A1
公开(公告)日：2012-06-28
申请号：US13411656
申请日：2012-03-05
IPC分类号： G11B7/1374 , G02B5/18
CPC分类号： G11B7/1275 , G02B3/08 , G02B5/1866 , G02B5/1876 , G02B13/16 , G02B27/283 , G02B27/4216 , G02B27/4238 , G02B27/4266 , G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： An optical element which can be shared by three wavelengths for BD, DVD, and CD and which is easily manufactured is provided. An objective lens system includes an optical element 1A and a converging lens element 1B. A first surface of the optical element 1A on an incident side is concentrically divided into a region 11 including a rotational symmetry axis, a region 12, and a region 13. On the optical element 1A, a periodic stair-like diffraction structure and a periodic sawtooth-like diffraction structure are provided. A second surface of the optical element 1A is divided into a region 21 including a rotational symmetry axis, a region 22, and a region 23. On the region 21, a sawtooth-like diffraction structure is provided. The converging lens element 1B converges light having passed through the optical element 1A, to form a spot on an information recording surface of an optical disc.
摘要翻译： 提供了可以由BD，DVD和CD的三个波长共享并且容易制造的光学元件。 物镜系统包括光学元件1A和会聚透镜元件1B。 入射侧的光学元件1A的第一表面被同心地分成包括旋转对称轴，区域12和区域13的区域11.在光学元件1A上，周期性阶梯状衍射结构和周期性 提供锯齿状衍射结构。 光学元件1A的第二表面被分成包括旋转对称轴，区域22和区域23的区域21.在区域21上，提供锯齿状衍射结构。 会聚透镜元件1B会聚已经通过光学元件1A的光，以在光盘的信息记录表面上形成点。
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公开(公告)号：US5982954A
公开(公告)日：1999-11-09
申请号：US955084
申请日：1997-10-21
申请人： Nuri Delen , Brian Hooker
发明人： Nuri Delen , Brian Hooker
CPC分类号： G02B27/4266 , G03H1/08
摘要： This invention provides a method and apparatus for analyzing the propagation of optical fields between arbitrarily oriented planes using full scalar diffraction theory. One aspect of the invention allows propagation between tilted planes. A second aspect allows propagation between offset planes. To analyze the propagation of an input optical field from a first plane to a second plane, the input field in the spatial domain is Fourier transformed to obtain the plane wave distribution in the spatial frequency domain. Within the spatial frequency domain the field is propagated from the first plane to the second plane by first multiplying the plane wave distribution by the spatial frequency domain phase accumulation between the first and second planes, and then converting the plane wave distribution from the coordinate system of the first plane to that of the second plane. Finally, the propagated plane wave distribution is inverse Fourier transformed to obtain the propagated optical field. This propagation sequence forms the building block for a numerical method to analyze optical systems using full scalar diffraction theory. To analyze optical systems, the input field is propagated from the plane of the source to the plane of the first optical element and the propagated optical field is multiplied by the transmittance function of the optical element. This invention further includes tolerance analysis of each parameter that affects the image quality and coupling efficiency of the optical system.
摘要翻译： 本发明提供一种用于使用全标量衍射理论来分析任意取向的平面之间的光场的传播的方法和装置。 本发明的一个方面允许在倾斜平面之间传播。 第二方面允许在偏移平面之间传播。 为了分析从第一平面到第二平面的输入光场的传播，空间域中的输入场被傅里叶变换以获得空间频域中的平面波分布。 在空间频域内，通过首先将平面波分布乘以第一和第二平面之间的空间频域相位累积，将场从第一平面传播到第二平面，然后将平面波分布从坐标系 第二架飞机的第一架飞机。 最后，传播的平面波分布进行傅里叶逆变换，以获得传播的光场。 该传播序列形成用于使用全标量衍射理论分析光学系统的数值方法的构建块。 为了分析光学系统，输入场从源的平面传播到第一光学元件的平面，并且传播的光场乘以光学元件的透射函数。 本发明还包括影响光学系统的图像质量和耦合效率的每个参数的容差分析。
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公开(公告)号：US20170235153A1
公开(公告)日：2017-08-17
申请号：US15428093
申请日：2017-02-08
申请人： THALES
CPC分类号： G02B27/4266 , G02B1/11 , G02B5/1809 , G02B5/1861 , G02B5/1866 , G02B5/1876 , G02B27/0012 , G02B27/42 , G02B27/4288 , G02B2005/1804
摘要： A wideband diffractive component capable of diffracting an incident beam exhibiting a wavelength lying in a diffraction spectral band, the diffractive component elementary areas arranged on a surface, each area belonging to a type indexed by an index i lying between 1 and n, with n greater than 1, index i corresponding to blaze wavelength λi of index i, the blaze wavelengths lying in the diffraction spectral band, an elementary area of type i comprising microstructures having at least a size less than 1.5 times the blaze wavelength of index i, the microstructures arranged to form an artificial material exhibiting an effective index variation such that an elementary area of type i constitutes a blazed diffractive element at the blaze wavelength λi of index i, the different values of the blaze wavelengths and the proportion of surface area occupied by the areas of a given type a function of a global diffraction efficiency desired in the diffraction spectral band.
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公开(公告)号：US20170075139A1
公开(公告)日：2017-03-16
申请号：US15359476
申请日：2016-11-22
发明人： Rainer Sessner , Joerg Petschulat , Katharina Havermann , Peter Klopfleisch , Matthias Burkhardt , Peter Pacher , Timo Kratzer , Herbert Krug
CPC分类号： G02C7/063 , B29D11/00009 , B29D11/00769 , G02B5/32 , G02B27/4266 , G02C7/028 , G02C7/06 , G02C2202/20 , G02C2202/22
摘要： The invention is directed to a spectacle lens and includes a body which is transparent or at least partly transparent to light and has a phase object which guides the light incident at an angle of incidence α on a side facing away from an observer into a direction depending on the wavelength λ of the light and the angle of incidence α thereof. The phase object has a multiplicity of diffraction structures, which diffract monochromatic light at a wavelength of 380 nm≦λ≦800 nm with a diffraction efficiency of η≧70% into one and same order of diffraction |m|≧1 when the monochromatic light is incident at an angle of incidence α on the side of the lens facing away from the observer which lies within a diffraction-structure-specific angle interval 15° wide and dependent on the wavelength of the light.
摘要翻译： 本发明涉及一种眼镜镜片，其包括对于光透明或至少部分透明的主体，并且具有相对物体，该相对物体将入射角θ以远离观察者的一侧入射到取决于 关于光的波长λ和其入射角α。 相位对象具有多个衍射结构，其衍射效率为η≥70％时，以380nm≤λ≤800nm的波长将单色光衍射成一个且相同的衍射次数| m |≥1，当单色光 以相对于观察者背面的透镜侧的入射角α入射在位于距离为15°的衍射结构特定的角度间隔内并且取决于光的波长的入射角α。
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公开(公告)号：US09581963B2
公开(公告)日：2017-02-28
申请号：US14361739
申请日：2012-11-29
发明人： Norbert Leister
CPC分类号： G03H1/0841 , G02B27/4205 , G02B27/4266 , G02B27/4272 , G03H1/0808 , G03H1/2205 , G03H1/2294 , G03H1/26 , G03H2001/0816 , G03H2001/0825 , G03H2223/23 , G03H2225/33 , G03H2226/02
摘要： A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.
摘要翻译： 全息图由分配给光调制装置中的相应编码区域的各个子图表构成，并分别分配给要用全息图重建的对象物体点。 通过虚拟观察者窗口，提供了定义的观察区域，观察者观察重构空间中的重建场景。 在虚拟观察窗中计算每个单独对象点的波阵面的复值。 随后将虚拟观察窗中的波阵面的复数值的每个单独振幅乘以校正值，利用该修正值对光调制装置的光束路径中布置在下游的至少一个体积光栅的角度选择性进行校正 。 以这种方式为所有对象点确定的校正后的复数值被求和并变换成光调制装置的全息图平面。
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10.发明授权公开(公告)号：US09405119B2
公开(公告)日：2016-08-02
申请号：US13231412
申请日：2011-09-13
申请人： Iftach Klapp , David Mendlovic
发明人： Iftach Klapp , David Mendlovic
CPC分类号： G06T5/003 , G02B26/06 , G02B27/0075 , G02B27/4266 , G02B27/46 , G06T2207/10004 , H04N5/2254 , H04N5/23232
摘要： An imaging device is presented for use in an imaging system capable of improving the image quality. The imaging device has one or more optical systems defining an effective aperture of the imaging device. The imaging device comprises a lens system having an algebraic representation matrix of a diagonalized form defining a first Condition Number, and a phase encoder utility adapted to effect a second Condition Number of an algebraic representation matrix of the imaging device, smaller than said first Condition Number of the lens system.
摘要翻译： 呈现成像装置用于能够提高图像质量的成像系统中。 成像装置具有限定成像装置的有效孔径的一个或多个光学系统。 成像装置包括具有定义第一条件数的对角化形式的代数表示矩阵的透镜系统和适于实现成像装置的代数表示矩阵的第二条件数的相位编码器实用程序，小于所述第一条件数 的镜头系统。
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