Results 231 to 240 of about 3,010,687 (303)

Erratum: Color-filter-array-based multispectral photoplethysmography optical sensor and its motion artifact correction algorithm (Erratum). [PDF]

J Biomed Opt
Wei Y, Cong S, Yan R, He Z, Li H, Yu G, Zou M.   +6 more
europepmc   +1 more source

A single-chip, dual-gain color-NIR camera for fluorescence-guided lung and breast cancer surgery. [PDF]

Light Sci Appl
Zhu Z, Hajek B, Jin Y, Stojanovski S, Jankulovska A, Angjushev D, Djikovski I, Jakupi N, Colanceski R, Ferati I, Antevski B, Vela I, Despotovski D, Tolevska Dimitrovska N, Bogdanovska Todorovska M, Kondov G, Kondov B, Nie S, Singhal S, Gruev V.   +19 more
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Optically tunable optical filter

Applied Optics, 1995
We experimentally demonstrate an optically tunable optical filter that uses photorefractive barium titanate. With our filter we implement a spectrum analyzer at 632.8 nm with a resolution of 1.2 nm. We simulate a wavelength-division multiplexing system by separating two semiconductor laser diodes, at 1560 nm and 1578 nm, with the same filter.
R T, James, C, Wah, K, Iizuka, H, Shimotahira   +3 more
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Synthesis of Optical Wavelet Filters

IEEE Photonics Technology Letters, 2004
The goal of the next generation of core and access optical networks is not the only the optical time and frequency signal multiplexing, but also the entire data processing performed in the optical domain, without any electrical-to-optical-to-electrical conversion.
Moreolo MS, Cincotti G, NERI, Alessandro
openaire   +1 more source

Optical filtering characteristic of potassium Faraday optical filter

IEEE Journal of Quantum Electronics, 2001
An ultra-narrow bandwidth potassium Faraday anomalous dispersion optical filter (FADOF) at the D/sub 2/ line is studied theoretically and experimentally. The effect of temperature on the characteristics of the potassium Faraday filter is discussed and the transmission versus temperature is given. Our research results show that the transmission of the K-
null Yundong Zhang, null Xiaoling Jia, null Zuguang Ma, null Qi Wang   +3 more
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Spatial filtering in optics

IEEE Transactions on Information Theory, 1956
Starting with the formulation of H. H. Hopkins for the image forming properties of an optical system in terms of a coherence factor over the object plane, the two extreme cases of complete coherence and incoherence are considered. The incoherent case is treated briefly as a low-pass spatial frequency filter.
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Optical filter

2023
HOUCK WILLIAM D, HULSE CHARLES ANDREW
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