Results 151 to 160 of about 1,427 (189)

Fibre Optic Reflection Photometry on Blood

Cardiovascular Research, 1968
A 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 ...
G A, Mook, P, Osypka, R E, Sturm, E H, Wood   +3 more
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Saao standards for optical photometry

Astrophysics and Space Science, 1995
A 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 ...
D. Kilkenny, A. W. J. Cousins
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Tapered Optical Fibers for Fluorescence Lifetime Photometry

Conference on Lasers and Electro-Optics, 2021
We 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., Balena A., Pisanello M., Pisano F., Sileo L., Spagnolo B., Montinaro C., Sabatini B. L., De Vittorio M., Pisanello F.   +9 more
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Optical photometry using Bradford robotic telescope

Astrophysics and Space Science, 2009
The Bradford Robotic Telescope (BRT) is located on Mount Teide at Tenerife and is working, taking observations since 2003. It is a fully automated telescope. The hardware and software used for the working of the telescope are described here. Twenty four BL Lac objects are observed since 2005 and magnitudes of the objects are calculated.
P. Seal Braun, J. E. F. Baruch
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Optics and photometry

, 1998
Walter Makous
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Optical photometry with the Kuiper Airborne Observatory

Publications of the Astronomical Society of the Pacific, 1983
The 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, J. L. Elliot
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Determination of optical constants by photometry

Journal of Physics D: Applied Physics, 1983
A 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 of Quasar 0957+561A, B

The Astrophysical Journal, 1996
Observations of the gravitational lens system 0957+561A, B in the R band are presented in this Letter. The observations, taken with the 82 cm IAC-80 telescope, at Teide Observatory, Spain, were made from the beginning of 1996 February to June, as part of an on-going lens monitoring program to obtain the time delay between the two components of the ...
Alejandro Oscoz, Miquel Serra-Ricart, Luis Julian Goicoechea, Jesús Buitrago, Evencio Mediavilla   +4 more
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Multi-band optical photometry of geosynchronous satellites

Sensors and Systems for Space Applications XI, 2018
We 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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