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"All-optical complex field imaging using diffractive processors" (2024) https://www.nature.com/articles/s41377-024-01482-6 https://www.nature.com/articles/s4137

"All-optical complex field imaging using diffractive processors" (2024) https://www.nature.com/articles/s41377-024-01482-6 https://www.nature.com/articles/s41377-024-01482-6 : > Abstract: Complex field imaging, which captures both the amplitude and phase information of input optical fields or objects, can offer rich structural insights into samples, such as their absorption and refractive index distributions. However, conventional image sensors are intensity-based and inherently lack the capability to directly measure the phase distribution of a field. This limitation can be overcome using interferometric or holographic methods, often supplemented by iterative phase retrieval algorithms, leading to a considerable increase in hardware complexity and computational demand. [...] - "New imager acquires amplitude and phase information without digital processing" (2024) https://phys.org/news/2024-05-imager-amplitude-phase-digital.amp https://phys.org/news/2024-05-imager-amplitude-phase-digital...

westurner 2y ago
From "Researchers create dispersion-assisted photodetector to decipher high-dim light" (2024-05) https://news.ycombinator.com/context?id=40492160 https://news.ycombinator.com/context?id=40492160 : > From "Physicists use [Huygens' mechanical oscillation] 350-year-old theorem to reveal new properties of light waves" https://news.ycombinator.com/item?id=37226160 https://news.ycombinator.com/item?id=37226160 regarding "Bridging coherence optics and classical mechanics: A generic light polarization-entanglement complementary relation" (2023) https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.5.033110 https://journals.aps.org/prresearch/abstract/10.1103/PhysRev... : >>> This means that hard-to-measure optical properties such as amplitudes, phases and correlations—perhaps even these of quantum wave systems—can be deduced from something a lot easier to measure: light intensity. > Which contradicts the article; though, high-fidelity polarization measurement should then also be useful.

westurner 2y ago

From "Researchers create dispersion-assisted photodetector to decipher high-dim light" (2024-05) https://news.ycombinator.com/context?id=40492160 https://news.ycombinator.com/context?id=40492160 : > From "Physicists use [Huygens' mechanical oscillation] 350-year-old theorem to reveal new properties of light waves" https://news.ycombinator.com/item?id=37226160 https://news.ycombinator.com/item?id=37226160 regarding "Bridging coherence optics and classical mechanics: A generic light polarization-entanglement complementary relation" (2023) https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.5.033110 https://journals.aps.org/prresearch/abstract/10.1103/PhysRev... : >>> This means that hard-to-measure optical properties such as amplitudes, phases and correlations—perhaps even these of quantum wave systems—can be deduced from something a lot easier to measure: light intensity. > Which contradicts the article; though, high-fidelity polarization measurement should then also be useful.