Optics: measuring and testing – Photometers – Integrating
Patent
1996-11-14
1998-02-03
Font, Frank G.
Optics: measuring and testing
Photometers
Integrating
356213, 356218, 356230, G01J 146
Patent
active
057150494
ABSTRACT:
When incident light is incident to a photodetector, photoelectrons are emitted therefrom and then multiplied to output an electric current signal. This current signal is integrated over a predetermined period of time in an integrator to be converted to a voltage signal. This voltage signal is converted to a digital signal by an AD converter. This digital signal is supplied to a histogramming memory, which generates a pulse height distribution of voltage signal. Based on a pulse height distribution N(h) generated with incidence of measurement-object light to the photodetector, a pulse height distribution of single photoelectron events p.sub.1 (h) generated by a generator of pulse height distribution of single photoelectron events, and pulse height distributions of k-photoelectron events p.sub.k (h) (k=2, 3, . . . ) calculated and generated in a generator of pulse height distributions of k-photoelectron events, an estimating unit estimates a distribution of numbers of photoelectrons emitted with incidence of the measurement-object light to the photodetector, and thereby obtains the intensity of the measurement-object light.
REFERENCES:
patent: 4600306 (1986-07-01), Hara et al.
patent: 4652751 (1987-03-01), Rundt et al.
patent: 4737029 (1988-04-01), Yabusaki et al.
patent: 4855930 (1989-08-01), Chao et al.
patent: 5561287 (1996-10-01), Turner et al.
Gratton et al., "Microprocessor-Controlled Photon-Counting Spectrofluorometer", Rev. Sci. Instrum. vol. 54, No. 3, Mar. 1983, pp. 294-299.
Hungerford et al., "Single-Photon Timing Detectors for Fluorescence Lifetime Spectroscopy", Meas. Sci. Technol. vol. 7, 1996, pp. 121-135.
Mandzhukov et al., "Weak-Scientillation Light Yield Determination", Instruments and Experimental Techniques ( May-Jun. 1987), vol. 30, No. 3, Pt. 2, pp. 657-661. (English Abstract).
Cuby et al., "High Precision Photometry: The Electron Bombarded Diode Approach", Astronomy and Astrophysics (Sept. 1988) , vol. 203, No. 1, pt. 1, pp. 203-206. (English Abstract).
Haselgrove et al., "A Single-Photon Counting Fluorescence Decay-Time Spectrometer", Journal of Physics E: Scientific Instruments 1977, vol. 10, pp. 1044-1049.
Wiinaendts van Resandt et al., "Double Beam Fluorescence Life-time Spectrometer with Subnanosecond Resolution: Application to Aqueous Tryptophan", Rev. Sci. Instrum. vol. 53, No. 9, Sept. 1982, pp. 1392-1397.
"Handbook of Optics"; Optical Society of America, vol. II pp. 20.5-20.13.
Engstrom, Ralph W. ; "Photomultiplyier Handbook", RCA Corp. , pp. 160-176, 1980.
Birch et al. ; "Time-Domain Fluorescence Spectroscopy Using Time-Correlated Single-Photon Counting", pp. 1-15, 1991.
Cushman et al. , "A Multichannel Avalanche Photodiode Phototube for Calorimetry", Nuclear Physics B, pp. 35-39, 1995.
Hirano et al. , "Fundamental Investigation of Vacuum PD Tube", IEEE Transactions on Nuclear Science, vol. 41, pp. 719-724, 1994.
Shawn J. Fagen; "Vacuum avalanche photodiodes can count single photons", Laser Focus World, pp. 125-132, Nov. 1993.
Cushman et al. , "A photomultiplier tube incorporating an avalanche photodiode", Nuclear Instruments & Methods in Physics Research, pp. 381-390, 1993.
Clements et al. , "Test results of the first Proximity Focused Hybrid Photodiode Detector prototypes", Nuclear Instruments and Methods in Physics Research, pp. 93-99, 1993.
Johansen et al. ; "Operational Characteristics of an electron-bombarded silicon-diode photomultiplier tube", Nuclear Instruments & Methods in Physics Research, pp. 295-298, 1993.
DeSalvo et al. , "First results on the hybrid photodiode tube"; Nuclear Instruments & Methods in Physics Research, pp. 375-384, 1992.
Ohsuka Shinji
Takamoto Hisayoshi
Font Frank G.
Laboratory of Molecular Biophotonics
Ratliff Reginald A.
LandOfFree
Light measuring apparatus for quantifying photons does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light measuring apparatus for quantifying photons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light measuring apparatus for quantifying photons will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-667416