Results 251 to 260 of about 537,589 (297)
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Applied Optics, 1968
The fundamentals of photon counting using photomultipliers are described, including criteria for selecting suitable photomultipliers, some of the precautions that must be taken in using these devices, and methods of calculating the counting errors that may occur under various conditions of measurement.
G A Morton
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The fundamentals of photon counting using photomultipliers are described, including criteria for selecting suitable photomultipliers, some of the precautions that must be taken in using these devices, and methods of calculating the counting errors that may occur under various conditions of measurement.
G A Morton
exaly +3 more sources
Photon Counting Histogram: One-Photon Excitation
ChemPhysChem, 2004AbstractThe photon counting histogram (PCH) analysis is a fluorescence fluctuation method that is able to characterize the brightness and concentration of different fluorescent species present in a liquid sample. We find that the PCH model using a three‐dimensional Gaussian observation volume profile is inadequate for fitting experimental data obtained
Richard Zare
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Photon counting with photodiodes
Applied Optics, 1983Preliminary results concerning the use of silicon photodiodes designed to be used in the photon counting or Geiger mode are described. These Geiger photodiodes have higher detected quantum efficiency than photomultiplier tubes over the 5000–9000-A wavelength region and are especially superior at longer wavelengths, although they can only be used in the
T E, Ingerson +2 more
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Photon-Counting Polarizing Radiometer
Applied Optics, 1974Photon counting is used in this instrument to obtain high precision in the measurement of the intensity, degree of polarization, and orientation of the plane of polarization of light in the natural environment. The dual-channel configuration, with four interference filters in each channel, provides the possibility of measurements in eight narrow ...
K L, Coulson +3 more
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Photon counting arrays for astrophysics
Journal of Modern Optics, 2007A compact system for counting and time-tagging single photons is presented, based on a monolithic array sensor of 60 pixels able to detect single photons, namely the single-photon avalanche diode array (SPADA). First, the working principle and performance of the single-photon detector pixel is detailed, with particular attention paid to monolithic ...
Zappa F +10 more
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Single photon counting imagery
Journal of Bioluminescence and Chemiluminescence, 1989AbstractAdvent of the multichannel plate and position sensitive detector has made possible true single photon counting imaging tubes. We have investigated the application of these detectors in studies of the ultraweak light emission of biological materials.
R Q, Scott, H, Inaba
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The capacity of the photon counting channel
IEEE Transactions on Information Theory, 1981Previous work has shown that the capacity of the single-mode photon-counting channel in the region in which quantum effects are most pronounced is 1/(kT \ln 2) bit/J. Here T is the quantum noise temperature, and k is Boltzmann's constant. However, to achieve this, the number of photons per second must be very low, so this does not determine the ...
John R. Pierce +2 more
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Characterizing Single Photons by Photon Counting
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009We study the ability to measure the non-Gaussian character of the single photon Fock states via direct measurements of the photon number statistics of displaced quantum states.
Kaisa Laiho +3 more
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Photon Counting During an Eclipse
Applied Optics, 1970We have built an instrument that counts pulses from photomultipliers that look at four bands of solar continuum, recording the changes in intensity during an eclipse. We use a plywood spectrograph to select an ultraviolet band and interference filters for the others.
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Photon-counting speckle masking: the photon-counting hole in the triple correlation
SPIE Proceedings, 1990Speckle interferograms of faint astronomical objects consist of 3 to 1000 photon events. Due to imageintensifier properties the photon events have different size. The only interesting information in such imagesare the positions of' the photon events.
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