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HIGH-QUALITY-FACTOR METASURFACE FOR PHASE CONTRAST IMAGING AND SPATIAL FREQUENCY FILTERING
HIGH-QUALITY-FACTOR METASURFACE FOR PHASE CONTRAST IMAGING AND SPATIAL FREQUENCY FILTERING
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机译:相位对比度成像和空间频率滤波的高质量因子元曲面
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摘要
Real-space optical signal processing is provided by optical angular filters that act on amplitude and/or phase of zero order light passing through a resonant diffractive optical device. One application is to phase contrast microscopy, where the diffractive optical device can be configured to have an amplitude and phase response suitable for phase contrast microscopy. For example, 60% or more intensity attenuation of the zero order light, combined with a phase shift of the zero order light by +/- 90 degrees.
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