Plane Wavefront(平面波前)研究综述
Plane Wavefront 平面波前 - The spherical wavefront and the plane wavefront are produced by a spatial light modulator (SLM) for Maxwellian display. [1] It is shown that an explosion in a channel produces a head shock wave with a plane wavefront, where the dynamic pressure significantly exceeds the pressure at fronts forming by the incident and reflected shock waves. [2] The spatially varying polarization distribution of these beams possesses information about the helical wavefront structures of the component OAM states, although they have plane wavefronts. [3] The metamaterial lens is fed using a Groove Gap Waveguide (GGW) horn antenna in order to achieve a plane wavefront at broadside. [4] The technique is based on the coherent combining of radiation of a fiber laser array with adaptive control of the power and phase of Gaussian subbeams with plane wavefronts. [5] The peak intensity at the focal plane is the maximum only when the initial intensity is uniform and the phase has a plane wavefront. [6] We propose a method for designing a refractive optical element with two working surfaces transforming an incident beam with a plane wavefront into an output beam with prescribed irradiance distribution and a non-planar wavefront. [7] Recording media for polarization holography have been created on the basis of 4-((2-bromo-4-nitrophenyl)diazenyl)phenyl methacrylate copolymers, and the properties during that they manifest during recording of holograms of a plane wavefront have been studied. [8] It documents the development of a MATLAB-based GUI to visualize plane wave polarization, electromagnetic wave propagation in two and three dimensions (2D/3D), plane wavefronts and spherical wavefronts. [9] The direct method of the maximum likelihood (ML) estimation of the power and the AoA of a signal with a plane wavefront and unknown temporal structure is considered. [10] The specific single-cycle shape of generated THz pulses requires a plane wavefront and detection in the near field. [11] These structured beams are defined by encoding the multiple phase singularities of topological l= 2 at the predefined locations in a plane wavefront. [12] Manipulation of a plane wavefront into a cylindrical wavefront is first observed through Finite Element simulations at low frequency (100 kHz), and then practically demonstrated through experiments. [13] A three-stage procedure of angle-of-arrival (AoA) estimation for signals with plane wavefront is proposed. [14] A GCVB with plane wavefront and doughnut-shaped intensity distribution is experimentally produced using this holographic metasurface. [15]球面波前和平面波前由用于麦克斯韦显示的空间光调制器 (SLM) 产生。 [1] 结果表明，通道中的爆炸会产生具有平面波前的头部冲击波，其中动态压力显着超过由入射和反射冲击波形成的前沿压力。 [2] 尽管它们具有平面波前，但这些光束的空间变化偏振分布具有关于分量 OAM 状态的螺旋波前结构的信息。 [3] 超材料透镜使用槽隙波导 (GGW) 喇叭天线馈电，以在宽边实现平面波前。 [4] 该技术基于光纤激光器阵列辐射的相干组合，以及对具有平面波前的高斯子光束的功率和相位的自适应控制。 [5] 只有当初始强度均匀且相位具有平面波前时，焦平面处的峰值强度才最大。 [6] 我们提出了一种用于设计具有两个工作表面的折射光学元件的方法，该方法将具有平面波前的入射光束转换为具有规定辐照度分布和非平面波前的输出光束。 [7] 已在 4-((2-bromo-4-nitrophenyl)diazenyl)phenyl methacrylate 共聚物的基础上创建了偏振全息记录介质，并研究了它们在平面波前全息图记录过程中表现出来的特性。 [8] 它记录了基于 MATLAB 的 GUI 的开发，以可视化平面波极化、二维和三维 (2D/3D) 中的电磁波传播、平面波前和球面波前。 [9] 考虑最大似然（ML）估计具有平面波前和未知时间结构的信号的功率和AoA的直接方法。 [10] 生成的太赫兹脉冲的特定单周期形状需要平面波前和近场检测。 [11] 这些结构化光束是通过在平面波前的预定义位置处对拓扑 l= 2 的多个相位奇点进行编码来定义的。 [12] 首先通过低频（100kHz）的有限元模拟观察将平面波前转换为圆柱波前，然后通过实验进行实际演示。 [13] 提出了一种平面波前信号的到达角（AoA）估计的三阶段过程。 [14] 使用这种全息超表面实验性地产生了具有平面波前和环形强度分布的 GCVB。 [15]
Focal Plane Wavefront 焦平面波前
We study a recently proposed focal plane wavefront estimation algorithm that exclusively uses broadband images to estimate the electric field. [1] Simulating a vortex coronagraph (VC) with two deformable mirrors, this study quantifies how the number of pinned actuators affects the performance of Focal Plane Wavefront Sensing and Control algorithms using both Grid Search Electric Field Conjugation (EFC) and Planned EFC, which uses Beta-Bumping. [2] We investigate the focal plane wavefront sensing technique, known as Phase Diversity, at the scientific focal plane of a segmented mirror telescope with an adaptive optics (AO) system. [3] Our SCExAO testbed results show that the combination of the APvAPP with LDFC provides a powerful new focal plane wavefront sensing technique by which high-contrast imaging systems can maintain high contrast during long observations. [4] Reconstructing the phase aberrations from focal plane images only is known as focal plane wavefront sensing. [5] We have proposed a focal plane wavefront sensing and control algorithm to address this challenge, called the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST), which enables the SCC to operate down to millisecond timescales even when only a few photons are detected per speckle. [6] Here we present the concept of the SM-SCC and show that it can be used for focal plane wavefront control, Coherence Differential Imaging (CDI) and Spectral Differential Imaging (SDI). [7] Focal plane wavefront sensing (FPWFS) is appealing for several reasons. [8] One solution is the self-coherent camera (SCC) focal plane wavefront sensor, whose performance was demonstrated in laboratory attenuating the starlight by factors up to several 1e8 in space-like conditions at angular separations down to 2L/D. [9] The aim of our efforts here is to demonstrate two focal plane wavefront sensing (FPWFS) techniques for sensing NCPA and suppressing quasi-static speckles in the final focal plane. [10] In contrast to AO that is widely used in ground telescopes, space-based AO systems will use focal plane wavefront sensing to measure the wavefront aberrations. [11]我们研究了一种最近提出的焦平面波前估计算法，该算法专门使用宽带图像来估计电场。 [1] 本研究使用两个可变形反射镜模拟涡流日冕仪 (VC)，使用网格搜索电场共轭 (EFC) 和计划 EFC（使用 Beta-颠簸。 [2] 我们在具有自适应光学 (AO) 系统的分段镜面望远镜的科学焦平面上研究焦平面波前传感技术，称为相位分集。 [3] 我们的 SCExAO 试验台结果表明，APvAPP 与 LDFC 的结合提供了一种强大的新型焦平面波前传感技术，通过该技术，高对比度成像系统可以在长时间观察期间保持高对比度。 [4] 仅从焦平面图像重建相位像差称为焦平面波前传感。 [5] 我们提出了一种焦平面波前传感和控制算法来应对这一挑战，称为快速大气自相干相机 (SCC) 技术 (FAST)，即使仅检测到几个光子，它也能够使 SCC 运行低至毫秒的时间尺度每个斑点。 [6] 在这里，我们介绍了 SM-SCC 的概念，并表明它可用于焦平面波前控制、相干差分成像 (CDI) 和光谱差分成像 (SDI)。 [7] 焦平面波前传感 (FPWFS) 之所以吸引人，有几个原因。 [8] 一种解决方案是自相干相机 (SCC) 焦平面波前传感器，其性能已在实验室中得到证实，它在类空间条件下以高达 1e8 的因子衰减星光，角间距低至 2L/D。 [9] 我们在这里努力的目的是展示两种焦平面波前传感 (FPWFS) 技术，用于传感 NCPA 和抑制最终焦平面中的准静态散斑。 [10] 与广泛用于地面望远镜的 AO 相比，天基 AO 系统将使用焦平面波前传感来测量波前像差。 [11]
Incident Plane Wavefront 入射平面波前
We have implemented an exact ray trace through a plano-freeform surface for an incident plane wavefront. [1] Especially in the phase validation of QZ, even slight misalignments between sampling plane and incident plane wavefront due to the limited precision of the positioner or tolerance in antenna fixture could result in large phase variations, which is not the true phase property of QZ. [2] We design Fresnel mirrors by using an exact ray tracing considering an incident plane wavefront propagating along the optical axis, impinging at arbitrary reflective surfaces, in order to efficiently redirect the light at a predefined area where will be placed the absorber. [3] Exact and approximate formulae for refracted wavefronts through singlet lenses are obtained by considering an incident plane wavefront propagating along the optical axis. [4]我们已经为入射平面波前实现了通过平面自由曲面的精确光线追踪。 [1] 特别是在 QZ 的相位验证中，由于定位器的精度有限或天线夹具的公差，即使采样平面和入射平面波前之间的轻微错位也会导致较大的相位变化，这不是 QZ 的真实相位特性。 [2] 我们通过使用精确的光线追踪来设计菲涅耳镜，考虑沿光轴传播的入射平面波前，撞击任意反射表面，以便在将放置吸收器的预定义区域有效地重定向光。 [3] 通过考虑沿光轴传播的入射平面波前，获得了通过单重透镜的折射波前的精确和近似公式。 [4]
Image Plane Wavefront
The DeMi payload contains a 50-mm primary mirror, an internal calibration laser source, a 140-actuator MEMS DM from Boston Micromachines Corporation, an image plane wavefront sensor, and a Shack–Hartmann wavefront sensor (SHWFS). [1] The PICTURE-C balloon aims to demonstrate 10-7 contrast using a vector vortex coronagraph, image plane wavefront sensor, and a 952 actuator MEMS DM. [2] The Deformable Mirror Demonstration Mission (DeMi) is a 6U CubeSat that will characterize the on-orbit performance of a Microelectromechanical Systems (MEMS) deformable mirror (DM) with both an image plane wavefront sensor and a Shack-Hartmann wavefront sensor (SHWFS). [3]DeMi 有效载荷包含一个 50 毫米主镜、一个内部校准激光源、一个来自波士顿微机械公司的 140 个执行器 MEMS DM、一个像平面波前传感器和一个 Shack-Hartmann 波前传感器 (SHWFS)。 [1] PICTURE-C 气球旨在使用矢量涡流日冕仪、像平面波前传感器和 952 致动器 MEMS DM 演示 10-7 对比度。 [2] 可变形镜演示任务 (DeMi) 是一个 6U CubeSat，它将表征具有像平面波前传感器和 Shack-Hartmann 波前传感器 (SHWFS) 的微机电系统 (MEMS) 可变形镜 (DM) 的在轨性能。 [3]
Tilted Plane Wavefront
We study the formation of caustic and wavefront surfaces produced by a tilted plane wavefront propagating through spherical positive lenses. [1] In first step, error due to approximation of tilted plane wavefront over curved wavefront is simulated. [2]我们研究了通过球面正透镜传播的倾斜平面波前产生的焦散和波前表面的形成。 [1] 第一步，模拟由于倾斜平面波前在弯曲波前上的近似而导致的误差。 [2]
plane wavefront sensing 平面波前传感
Simulating a vortex coronagraph (VC) with two deformable mirrors, this study quantifies how the number of pinned actuators affects the performance of Focal Plane Wavefront Sensing and Control algorithms using both Grid Search Electric Field Conjugation (EFC) and Planned EFC, which uses Beta-Bumping. [1] We investigate the focal plane wavefront sensing technique, known as Phase Diversity, at the scientific focal plane of a segmented mirror telescope with an adaptive optics (AO) system. [2] Our SCExAO testbed results show that the combination of the APvAPP with LDFC provides a powerful new focal plane wavefront sensing technique by which high-contrast imaging systems can maintain high contrast during long observations. [3] Reconstructing the phase aberrations from focal plane images only is known as focal plane wavefront sensing. [4] We have proposed a focal plane wavefront sensing and control algorithm to address this challenge, called the Fast Atmospheric Self-coherent camera (SCC) Technique (FAST), which enables the SCC to operate down to millisecond timescales even when only a few photons are detected per speckle. [5] Future space-based coronagraphs will rely critically on focal-plane wavefront sensing and control with deformable mirrors to reach deep contrast by mitigating optical aberrations in the primary beam path. [6] We investigated using the Fast and Furious focal-plane wavefront sensing algorithm as a potential solution. [7] Focal plane wavefront sensing (FPWFS) is appealing for several reasons. [8] PICTURE-C employs both image-plane wavefront sensing for high-order wave- front control and a reflective Lyot-stop sensor for low-order wavefront control. [9] The aim of our efforts here is to demonstrate two focal plane wavefront sensing (FPWFS) techniques for sensing NCPA and suppressing quasi-static speckles in the final focal plane. [10] The focal-plane wavefront sensing (FPWFS) performance of the vAPP and the algorithm are evaluated with numerical simulations, to test various photon and read noise levels, the sensitivity to the 100 lowest Zernike modes and the maximum wavefront error (WFE) that can be accurately estimated in one iteration. [11] In contrast to AO that is widely used in ground telescopes, space-based AO systems will use focal plane wavefront sensing to measure the wavefront aberrations. [12]本研究使用两个可变形反射镜模拟涡流日冕仪 (VC)，使用网格搜索电场共轭 (EFC) 和计划 EFC（使用 Beta-颠簸。 [1] 我们在具有自适应光学 (AO) 系统的分段镜面望远镜的科学焦平面上研究焦平面波前传感技术，称为相位分集。 [2] 我们的 SCExAO 试验台结果表明，APvAPP 与 LDFC 的结合提供了一种强大的新型焦平面波前传感技术，通过该技术，高对比度成像系统可以在长时间观察期间保持高对比度。 [3] 仅从焦平面图像重建相位像差称为焦平面波前传感。 [4] 我们提出了一种焦平面波前传感和控制算法来应对这一挑战，称为快速大气自相干相机 (SCC) 技术 (FAST)，即使仅检测到几个光子，它也能够使 SCC 运行低至毫秒的时间尺度每个斑点。 [5] 未来的天基日冕仪将严重依赖焦平面波前传感和可变形镜的控制，以通过减轻主光束路径中的光学像差来达到深度对比度。 [6] 我们使用“速度与激情”焦平面波前传感算法作为一种潜在的解决方案进行了研究。 [7] 焦平面波前传感 (FPWFS) 之所以吸引人，有几个原因。 [8] PICTURE-C 采用图像平面波前传感进行高阶波前控制和反射 Lyot-stop 传感器进行低阶波前控制。 [9] 我们在这里努力的目的是展示两种焦平面波前传感 (FPWFS) 技术，用于传感 NCPA 和抑制最终焦平面中的准静态散斑。 [10] vAPP 的焦平面波前传感 (FPWFS) 性能和算法通过数值模拟进行评估，以测试各种光子和读取噪声水平、对 100 种最低 Zernike 模式的灵敏度和最大波前误差 (WFE)在一次迭代中准确估计。 [11] 与广泛用于地面望远镜的 AO 相比，天基 AO 系统将使用焦平面波前传感来测量波前像差。 [12]
plane wavefront sensor 平面波前传感器
The self-coherent camera (SCC) is an integrated coronagraph and focal-plane wavefront sensor that generates wavefront information-encoding Fizeau fringes in the focal plane by adding a reference hole (RH) in the Lyot stop. [1] The DeMi payload contains a 50-mm primary mirror, an internal calibration laser source, a 140-actuator MEMS DM from Boston Micromachines Corporation, an image plane wavefront sensor, and a Shack–Hartmann wavefront sensor (SHWFS). [2] The PICTURE-C balloon aims to demonstrate 10-7 contrast using a vector vortex coronagraph, image plane wavefront sensor, and a 952 actuator MEMS DM. [3] One solution is the self-coherent camera (SCC) focal plane wavefront sensor, whose performance was demonstrated in laboratory attenuating the starlight by factors up to several 1e8 in space-like conditions at angular separations down to 2L/D. [4] The Deformable Mirror Demonstration Mission (DeMi) is a 6U CubeSat that will characterize the on-orbit performance of a Microelectromechanical Systems (MEMS) deformable mirror (DM) with both an image plane wavefront sensor and a Shack-Hartmann wavefront sensor (SHWFS). [5]自相干相机 (SCC) 是一个集成的日冕仪和焦平面波前传感器，它通过在 Lyot 光阑中添加参考孔 (RH) 在焦平面中生成波前信息编码菲索条纹。 [1] DeMi 有效载荷包含一个 50 毫米主镜、一个内部校准激光源、一个来自波士顿微机械公司的 140 个执行器 MEMS DM、一个像平面波前传感器和一个 Shack-Hartmann 波前传感器 (SHWFS)。 [2] PICTURE-C 气球旨在使用矢量涡流日冕仪、像平面波前传感器和 952 致动器 MEMS DM 演示 10-7 对比度。 [3] 一种解决方案是自相干相机 (SCC) 焦平面波前传感器，其性能已在实验室中得到证实，它在类空间条件下以高达 1e8 的因子衰减星光，角间距低至 2L/D。 [4] 可变形镜演示任务 (DeMi) 是一个 6U CubeSat，它将表征具有像平面波前传感器和 Shack-Hartmann 波前传感器 (SHWFS) 的微机电系统 (MEMS) 可变形镜 (DM) 的在轨性能。 [5]
plane wavefront propagating
We design Fresnel mirrors by using an exact ray tracing considering an incident plane wavefront propagating along the optical axis, impinging at arbitrary reflective surfaces, in order to efficiently redirect the light at a predefined area where will be placed the absorber. [1] Exact and approximate formulae for refracted wavefronts through singlet lenses are obtained by considering an incident plane wavefront propagating along the optical axis. [2] We study the formation of caustic and wavefront surfaces produced by a tilted plane wavefront propagating through spherical positive lenses. [3]我们通过使用精确的光线追踪来设计菲涅耳镜，考虑沿光轴传播的入射平面波前，撞击任意反射表面，以便在将放置吸收器的预定义区域有效地重定向光。 [1] 通过考虑沿光轴传播的入射平面波前，获得了通过单重透镜的折射波前的精确和近似公式。 [2] 我们研究了通过球面正透镜传播的倾斜平面波前产生的焦散和波前表面的形成。 [3]
plane wavefront control 平面波前控制
We describe an approach to coronagraphic focal-plane wavefront control that utilizes gradient-based nonlinear optimization along with analytical gradients obtained with algorithmic differentiation to find deformable mirror solutions. [1] Here we present the concept of the SM-SCC and show that it can be used for focal plane wavefront control, Coherence Differential Imaging (CDI) and Spectral Differential Imaging (SDI). [2] Our preliminary results indicate that spatial LDFC is a promising method focal-plane wavefront control method capable of maintaining a static dark hole, at least at contrasts relevant for imaging mature planets with 30m-class telescopes. [3]我们描述了一种日冕焦平面波前控制方法，该方法利用基于梯度的非线性优化以及通过算法微分获得的分析梯度来找到可变形镜解决方案。 [1] 在这里，我们介绍了 SM-SCC 的概念，并表明它可用于焦平面波前控制、相干差分成像 (CDI) 和光谱差分成像 (SDI)。 [2] 我们的初步结果表明，空间 LDFC 是一种有前途的焦平面波前控制方法，能够保持静态黑洞，至少在与 30m 级望远镜成像成熟行星相关的对比度上。 [3]