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Author: keith lykke

Displaying records 101 to 110 of 113 records.
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101. Characterization of UV-Induced Radiation Damage to Si-based Photodiodes
Published: Date unknown
Authors: Keith R Lykke, Ping-Shine Shaw, J L Dehmer, R Gupta
Abstract: We have made direct measurements of the internal quantum efficiency and the reflectivity of UV-damaged silicon photodiodes in the spectral range of 120 nm to 320 nm. The above qualities, coupled with absolute spectral responsivities, give unique inf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841252

102. Compact Anamorphic Imaging Spectrometer
Published: Date unknown
Authors: P Maciejewski, K Barnard, Rand Swanson, Michael Kehoe, C Smith, Thomas Moon, Robert R. Bousquet, Steven W Brown, Keith R Lykke
Abstract: Deployment of compact hyperspectral imaging sensors on small UAVs has the potential of providing a cost-effective solution for rapid-response target detection and cueing based on time-critical spectral information collected at low altitudes. To addre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841073

103. Correction of Stray Light In Spectroradiometers and Imaging Instruments
Published: Date unknown
Authors: Yuqin Zong, Steven W Brown, Keith R Lykke, Yoshihiro Ohno
Abstract: Measurement errors from stray light, spectral or spatial, are inevitable and are often the dominant source of error in spectroradiometers and imaging radiometers/photometers. We have developed a simple matrix method for correcting spatial stray light ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841072

104. Correction of Stray Light in Spectrographs: Implications for Remote Sensing
Published: Date unknown
Authors: Yuqin Zong, Steven W Brown, Bettye C Johnson, Keith R Lykke, Yoshihiro Ohno
Abstract: Spectrographs are used in a variety of applications in the field of remote sensing for radiometric measurements due to the benefits of measurement speed, sensitivity, and portability. However, spectrographs are single grating instruments that are su ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840972

105. Development of a Monochromatic Uniform Source Facility for Calibration of Radiance and Irradiance Detectors from 0.2 um to 12 um
Published: Date unknown
Authors: Keith R Lykke, Ping-Shine Shaw, Leonard M Hanssen, George P Eppeldauer
Abstract: A radiometric source facility is being constructed with narrow-band, widely tunable lasers from {difference} 200nm to 12 um. The output will be highly uniform and monochromatic. This facility will be used to make a wide variety of radiometric measu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840289

106. Measurement of Total Radiant Flux of UV LEDS
Published: Date unknown
Authors: Yuqin Zong, Carl C Miller, Keith R Lykke, Yoshihiro Ohno
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841828

107. Spectral Irradiance Responsivity Measurements Between 1mu m and 5 mu m
Published: Date unknown
Authors: George P Eppeldauer, Joseph Paul Rice, Jun Zhang, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841819

108. Spectral Irradiance and Radiance Responsivity Calibrations Using Uniform Sources (SIRCUS) Facility at NIST
Published: Date unknown
Authors: Steven W Brown, George P Eppeldauer, Joseph Paul Rice, Jun Zhang, Keith R Lykke
Abstract: Detectors have historically been calibrated for spectral power responsivity at the National Institute of Standards and Technology (NIST) using a lamp-monochromator system to tune the wavelength of the excitation source. Silicon detectors can be cali ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841840

109. System-Level Pre-Launch Calibration of Onboard Solar Diffusers
Published: Date unknown
Authors: R Barnes, Steven W Brown, Keith R Lykke, Gerald T Fraser, James J. Butler
Abstract: Onboard diffuse reflecting plaques are carried to orbit as radiometric reference standards for Earth-observing satellite instruments. For many instruments the reflectance properties of the plaque are characterized independent of the instrument, and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841129

110. Temperature Determination of the Ag-and Au-Freezing Points Using a Detector-Based Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Maritoni Abatayo Litorja, Robert D. Saunders, Steven W Brown, George P Eppeldauer, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841855



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