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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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计算机生成的全息编码通过动态区域细分和并行相差推断推断.

Zixuan Wang, Qinghua Yu

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    概括
    此摘要是机器生成的。

    本研究介绍了一种高效的计算机生成全息图 (CGH) 编码方法,用于自由形光学测试. 它显著减少了计算时间和数据大小,同时保持了高精度,使先进的光学系统能够更广泛地采用.

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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    科学领域:

    • 光学工程是指光学工程.
    • 计量学 计量学 计量学
    • 计算光学是指计算机光学.

    背景情况:

    • 自由形状的光学元件对于高性能成像系统至关重要.
    • 用于零测试的计算机生成全息图 (CGH) 由于复杂的边缘模式,在编码精度,计算和数据大小方面面临挑战.
    • 有效的CGH编码对于自由形光学的广泛采用至关重要.

    研究的目的:

    • 为自由形光学零测试开发一种新的CGH编码方法.
    • 为了解决编码精度,计算工作量和数据大小之间的权衡问题.
    • 为了提高复杂光学元件的CGH编码的效率和实用性.

    主要方法:

    • 利用边缘图案结构特征和空间相连续性推断相位值.
    • 理论分析比较传统方法的二次增长与拟议方法的线性增长.
    • 在误差建模的干扰测试中应用和验证编码的CGH.

    主要成果:

    • 提出的方法在明确的点实现了线性增长,与传统方法的二次增长不同.
    • 已经证明了运行时间的显著减少 (约. 107.92x) 和数据大小 (约. 99x) 对于直径较大的CGH.
    • 编码错误保持在 λ/200 以下,验证了高精度.
    • 在干扰测试中的成功应用证实了准确性和有效性.

    结论:

    • 开发的CGH编码方法在编码精度,计算效率和存储需求之间提供了有利的平衡.
    • 这种方法为自由形式光学零测试中的高精度CGH编码提供了实际解决方案.
    • 该方法有助于在先进的成像应用中有效和广泛使用自由形光学.