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Author: keith lykke

Displaying records 31 to 40 of 113 records.
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31. Stability of Photodiodes Under Irradiation With 157-nm Pulsed Excimer Laser
Published: 1/1/2005
Authors: Ping-Shine Shaw, R Gupta, Keith R Lykke
Abstract: We have measured the stability of a variety of photodiodes as they are irradiated with UV light from a pulsed excimer laser source operating at 157 nm using a radiometry beamline at the Synchrotron Ultraviolet Radiation Facility (SURF III) at the Nat ...

32. Measurement of Total Radiant Flux of UV LEDs
Published: 6/1/2004
Authors: Yuqin Zong, Carl C Miller, Keith R Lykke, Yoshihiro Ohno

33. Spectral Irradiance and Radiance Responsivity Calibrations Using Uniform Sources (SIRCUS) Facility at NIST
Published: 1/1/2004
Authors: Steven W Brown, George P Eppeldauer, Joseph Paul Rice, Jun Zhang, Keith R Lykke

34. Temperature determinations of the Ag and Au-freezing points using a detector-based radiation thermometer
Published: 1/1/2004
Authors: David W Allen, Steven W Brown, George P Eppeldauer, Charles E Gibson, Maritoni Abatayo Litorja, Keith R Lykke, Robert D. Saunders, Howard W Yoon

35. The realization and the dissemination of the detector-based kelvin
Published: 1/1/2004
Authors: David W Allen, Steven W Brown, George P Eppeldauer, Charles E Gibson, Maritoni Abatayo Litorja, Keith R Lykke, Robert D. Saunders, Howard W Yoon

36. Calibration and Characterization of Trap Detector Filter Radiometers
Published: 11/1/2003
Authors: David W Allen, George P Eppeldauer, Steven W Brown, E A. Early, Bettye C Johnson, Keith R Lykke
Abstract: We describe the development of a mechanically simple, radiometrically stable transfer radiometer designed for both radiance and irradiance measurements. The filter radiometer consists of a six-element Si trap detector, a temperature stabilized filter ...

37. Comparison of Laser-Based and Conventional Calibrations of Sun Photometers
Published: 11/1/2003
Authors: N Souaidia, C Pietras, G Fargion, R Barnes, R Frouin, Keith R Lykke, Bettye C Johnson, Steven W Brown
Abstract: Sun photometers are used to characterize the radiative properties of the atmosphere. They measure both the incident solar irradiance as well as the sky radiance (from scattered incident flux). Global networks of sun photometers provide data product ...

38. A Method for Testing the Spectral Responsivity of Infrared Cameras Using Tunable Lasers
Published: 8/1/2003
Authors: Joseph Paul Rice, Keith R Lykke, Howard W Yoon
Abstract: We are developing a technique for accurately measuring spectral responsivity functions of infrared cameras using tunable lasers. We present preliminary results for uniform scenes where tunable infrared lasers illuminate an integrating sphere, diffus ...

39. Quantum Yield of the Iodide/Iodate Chemical Actinometer: Dependence on Wavelength and Concentration
Published: 8/1/2003
Authors: R O Rahn, M I Stefan, J R Bolton, E Goren, Ping-Shine Shaw, Keith R Lykke
Abstract: The quantum yield (QY) of the iodide/iodate chemical actinometer (0.6 M KI/ 0.1 M K103) was determinedirradiation between 214 run and 330 mu. The photoproduct, triiodide, was determined flum the increase iabsorbance at 352 run, which together with a ...

40. Improved Accuracy Photometric and Tristimulus-Color Scales Based On Spectral Irradiance Responsivity
Published: 7/1/2003
Authors: George P Eppeldauer, Steven W Brown, Carl C Miller, Keith R Lykke

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