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You searched on: Author: george eppeldauer

Displaying records 121 to 130 of 137 records.
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121. Chopped Radiation Measurement With Large Area Si Photodiodes
Published: Date unknown
Author: George P Eppeldauer
Abstract: Frequency dependent response characteristics of photocurrent meters using large area, radiometric quality Si photodiodes have been analyzed. The current responsivity, the voltage noise and drift amplicication, and the gain and bandwidth of the photo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841245

122. Development and Application Issues of a Spectrally Tunable LED Source
Published: Date unknown
Authors: George P Eppeldauer, Steven W Brown, G Dezsi, Irena Fryc, Yoshihiro Ohno
Abstract: A spectrally tunable solid state source based on Light Emitting Diodes (LEDs) is being developed at the National Institute of Standards and Technology (NIST). The tunable source will emulate the spectral distributions of various light sources and can ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841824

123. Development and Calibration of Pyroelectric Radiometer Standards at NIST
Published: Date unknown
Authors: George P Eppeldauer, Jinan Zeng, Leonard M Hanssen
Abstract: The reference spectral power responsivity scale of NIST is being extended from the silicon range to the infrared (IR) using pyroelectric radiometers. Two transfer standard pyroelectric radiometers have been developed at NIST. The main design consider ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841021

124. 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

125. Development of the NIST Detector-based Color Temperature Scale
Published: Date unknown
Authors: George P Eppeldauer, Yoshihiro Ohno
Abstract: Based on the spectral responsivity of the channels of a tristimulus colorimeter, a color temperature scale is being developed at NIST. The low uncertainty of the spectral responsivity measurements can dominate the chromaticity measurement uncertainty ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841031

126. Improved Accuracy Tristimulus Colorimeters Calibrated With Standard
Published: Date unknown
Author: George P Eppeldauer
Abstract: A new method has been developed to calibrate tristimulus colorimeters for high accuracy color measurements. Instead of traditional lamp standards, modern, high accuracy detector standards are suggested for calibration. After high accuracy absolute ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841335

127. Improved Facility for Optical Detector Characterization
Published: Date unknown
Authors: T Flournoy, George P Eppeldauer
Abstract: The detector characterization and calibration facility of the Army Primary Standards Laboratory (APSL) has been extended. In addition to the traditional filter and monochromator based spectral measurements, laser-based sphere sources and high perfor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841706

128. LED-Based Spectrally Tunable Source for Radiometric, Photometric and Colorimetric Applications
Published: Date unknown
Authors: Irena Fryc, Steven W Brown, George P Eppeldauer, Yoshihiro Ohno
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841847

129. New Photometer Standards for Low Uncertainty Illuminance Scale Realization
Published: Date unknown
Authors: George P Eppeldauer, Carl C Miller, Yoshihiro Ohno
Abstract: Improved performance photometers have been developed at the National Institute of Standards and Technology (NIST) to utilize the low spectral responsivity uncertainty of spectral irradiance responsivity measurements performed on the facility of Spect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841066

130. New Working Standards to Disseminate NIST Radiometric and Photometric Scales
Published: Date unknown
Authors: George P Eppeldauer, Richard Austin, Charles Lustenberger
Abstract: A new generation radiometer-photometer system has been developed in a National Institute of Standards and Technology (NIST) and Gamma Scientific (GS) cooperation to satisfy the increased requirements in the dissemination of NIST responsivity scales. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841067



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