公开(公告)号：WO2018152336A1

公开(公告)日：2018-08-23

申请号：PCT/US2018/018384

申请日：2018-02-15

Applicant: AKONIA HOLOGRAPHICS LLC

Inventor： AYRES, Mark R. ,  URNESS, Adam ,  ANDERSON, Kenneth E. ,  BERLINER, Chris

IPC: G03H1/00 ,  G02B5/18 ,  G02B27/00

Abstract: A skew mirror is an optical reflective device, such as a volume holographic optical element, whose reflective axis forms an angle (the skew angle) with the surface normal. A skew illuminator is a skew mirror that expands a narrow beam into a wide beam without changing the angular bandwidth of the illumination. Because the skew angle can form a relatively large angle with the surface normal (e.g., about 45), a skew illuminator can be fairly compact, making it suitable for directing light onto a spatial light modulator (SLM) in a small package. In some cases, the skew illuminator is formed as a waveguide, with a holographic layer sandwiched between a pair of substrates. A grating structure in the holographic core diffracts light out of the waveguide and, e.g., onto the active area of an SLM, which modulates the incident light and either transmits it or reflects it back through the waveguided skew illuminator.

公开(公告)号：WO2015168325A1

公开(公告)日：2015-11-05

申请号：PCT/US2015/028356

申请日：2015-04-29

Applicant: AKONIA HOLOGRAPHICS, LLC

Inventor： AYRES, Mark R. ,  ANDERSON, Kenneth E. ,  PRUETT, David C. ,  LOECHEL, Will A.

IPC: G11B7/0065 ,  G11B7/007

CPC classification number: G11B7/0065 ,  G11B7/128 ,  G11B20/10009 ,  G11B20/10277

Abstract: Methods and devices for coherent holographic data channel techniques are presented. Coherent techniques for data detection generally include homodyne and heterodyne detection. Techniques for quadrature homodyne detection, resampling quadrature homodyne detection, n-rature homodyne detection, and spatial wavefront demodulation are presented. Coherent detection techniques in turn enable coherent channel modulation techniques such as phase modulation (including binary phase shift keying, or BPSK; phase quadrature holographic multiplexing, or QPSK; and quadrature amplitude modulation, or QAM). Coherent detection may also enable or improve the performance of other channel techniques such as partial response maximum likelihood (PRML), the various classes of extended PRML, and of noise-predictive maximum likelihood (NPML) detection.

Abstract translation: 提出了相干全息数据通道技术的方法和装置。 数据检测的相干技术通常包括零差和外差检测。 提出了正交零差检测技术，重采样正交零差检测，n-rature零差检测和空间波前解调。 相干检测技术依次实现相位调制技术，例如相位调制（包括二进制相移键控或BPSK;相位正交全息复用或QPSK;以及正交幅度调制或QAM）。 相干检测还可以实现或改善其他信道技术的性能，例如部分响应最大似然（PRML），扩展PRML的各种类型以及噪声预测最大似然（NPML）检测。

公开(公告)号：WO2017176389A1

公开(公告)日：2017-10-12

申请号：PCT/US2017/020087

申请日：2017-03-01

Applicant: AKONIA HOLOGRAPHICS LLC

Inventor： AYRES, Mark R. ,  URNESS, Adam ,  ANDERSON, Kenneth E. ,  SCHLOTTAU, Friso

IPC: G03H1/26 ,  G02B5/18 ,  G02B5/32 ,  G02B27/01

Abstract: A holographic skew mirror has a reflective axis, or skew axis, that can be tilted with respect to its surface normal. Tilting the skew axis in two dimensions with respect to the surface normal expands the holographic skew mirror's possible field of view, e.g., to 60 or more. These additional angles can be accessed using an out-of-plane writing geometry with matched total internal grazing extension rotation (TIGER) prisms.

Abstract translation: 全息斜反射镜具有可相对于其表面法线倾斜的反射轴或倾斜轴。 使倾斜轴相对于表面法线倾斜二维，将全息倾斜镜的可能视场扩大到例如60或更多。 这些附加角度可以使用具有匹配的全内部放牧延伸旋转（TIGER）棱镜的平面外书写几何体来访问。

公开(公告)号：WO2018071714A1

公开(公告)日：2018-04-19

申请号：PCT/US2017/056404

申请日：2017-10-12

Applicant: AKONIA HOLOGRAPHICS, LLC

Inventor： AYRES, Mark R. ,  URNESS, Adam ,  ANDERSON, Kenneth E. ,  SCHLOTTAU, Friso

IPC: G02B5/18 ,  G02B5/08

Abstract: A skew mirror is an optical reflective device whose reflective axis forms a non-zero angle with the surface normal. A spatially varying skew mirror is a skew mirror whose reflective axes vary as a function of lateral position. If a spatially varying skew mirror was subdivided into many pieces, some or all of the many pieces could have a reflective axis that points in a different direction. In some variations, a spatially varying skew mirror can act as a focusing mirror that focuses incident light. A spatially varying skew mirror can be made by recording interference patterns between a phase-modulated writing beam and another writing beam or by recording interference patterns between planar wavefronts in a curved holographic recording medium that is later bent or warped.

Abstract translation: 斜镜是一种光学反射装置，其反射轴与表面法线形成非零角度。 空间变化的斜镜是斜镜，其反射轴随横向位置而变化。 如果一个空间变化的反射镜被细分成许多块，那么许多块中的一些或全部可能有一个指向不同方向的反射轴。 在一些变型中，空间变化的倾斜反射镜可以充当聚焦入射光的聚焦镜。 可以通过记录相位调制的写入光束和另一个写入光束之间的干涉图案或者通过记录弯曲的全息记录介质中的平面波前之间的干涉图案来制作空间变化的倾斜反射镜，该弯曲的全息记录介质随后弯曲或翘曲。