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Saao standards for optical photometry
Astrophysics and Space Science, 1995A review is given of the development of systems of photometric standard stars at the South African Astronomical Observatory. A brief historical perspective indicates how the Harvard E-regions were chosen as standard sequences and developed into a very precise Southern hemisphere system for UBV(RI) c photometry ...
A. W. J. Cousins, D. Kilkenny
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Fibre Optic Reflection Photometry on Blood
Cardiovascular Research, 1968A two photocell assembly has been used to measure the light reflection of blood conducted by fibre optics. Fibre optic reflection spectra of oxygenated and reduced blood samples show an isobestic region around 850 nm. Non-specific variations of the light reflection from a mirror do not affect the ratio of detecting and compensating photocell outputs ...
Gerrit A. Mook +3 more
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Tapered Optical Fibers for Fluorescence Lifetime Photometry
Conference on Lasers and Electro-Optics, 2021We describe a system exploiting a multi-anode array placed in the far-field plane of a tapered optical fiber to perform fluorescence lifetime photometry with depth-resolution in brain tissue.
Bianco M. +9 more
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Determination of optical constants by photometry
Journal of Physics D: Applied Physics, 1983A recent study of the accuracies of determining the optical constants of thin films, for film thicknesses up to 0.04 lambda , has been extended to include film thicknesses up to 0.25 lambda , and the results are reported. It is shown that the method may also be applied to bulk materials.
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Optical photometry with the Kuiper Airborne Observatory
Publications of the Astronomical Society of the Pacific, 1983The properties of optical photometric data obtainable with the 0.9-meter telescope of the Kuiper Airborne Observatory are described. The major differences between airborne and ground-based data are the absence of scintillation and the increased cosmic-ray background in the airborne data and the large size and vibration of the airborne images.
E. W. Dunham, James L. Elliot
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Mid-ultraviolet and optical photometry of helium stars
Journal of Astrophysics and Astronomy, 1992Mid-ultraviolet and optical photometric analysis of helium stars are presented. A linear relation exists between the effective temperature derived from model atmospheres and (1965-V)0 index. The effective temperatures derived from (1965-V)0 index are somewhat higher than that of MK spectral type estimates especially for late B-type helium objects.
N. Kameswara Rao +2 more
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Photometry, Radiometry, and Measurements of Optical Losses
2019Preface: The revised 2nd edition of this practical book provides an expanded treatment and comparison of techniques used in advanced optical measurements, guiding its reader from fundamental radiometric and photometric concepts to the state-of-the-art in highly sensitive measurements of optical losses and in spectroscopic detection using coherent laser
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Multi-band optical photometry of geosynchronous satellites
Sensors and Systems for Space Applications XI, 2018We present the results of multi band optical photometry (B, V, R and I) for 66% of the sample of geosynchronous satellites observable from Flagstaff, AZ. Observations were done while the targets were at solar phase angle smaller than ±5°, to probe the period when they are expected to reach maximum brightness.
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Fiber photometry in striatum reflects primarily nonsomatic changes in calcium
Nature Neuroscience, 2022Alex A Legaria, Jones G Parker, Ben Yang
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