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You searched on: Author: yuqin zong Sorted by: title

Displaying records 1 to 10 of 34 records.
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1. Analysis of Uncertainties in Stray-Light Correction
Published: 12/1/2010
Author: Yuqin Zong
Abstract: Measurement errors arising from stray light within a spectroradiometer are often the dominant source of uncertainty and are difficult to reduce. However, the stray-light errors can be corrected by using a stray-light correction matrix that is derived ...

2. Calibrations of Colorimeters for Display Measurements: Some Commercial Colorimeters Have Uncertainties in Display-Color Measurements That Are Too Large for Many Commercial, Industrial and Military Applications - But New NIST-Developed Calibration Proc...
Published: 12/1/1999
Authors: Steven W Brown, Yuqin Zong, Yoshihiro Ohno
Abstract: Commercial color measuring instruments (colorimeters and spectroradiometers) are currently used in a number of product development and control environments, as well as for product acceptance testing and a variety of other applications. In many cases, ...

3. Characterization and Correction of Stray Light in Optical Instruments
Published: 11/1/2007
Authors: Yuqin Zong, Steven W Brown, G Meister, R Barnes, Keith R. Lykke
Abstract: Improperly imaged, or scattered, optical radiation within an instrument is difficult to properly characterize and is often the dominant residual source of measurement error. Scattered light can originate from the spectral components of a point sour ...

4. Correction of Stray Light In Spectroradiometers and Imaging Instruments
Published: 7/4/2007
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 ...

5. Correction of Stray Light in Spectrographs: Implications for Remote Sensing
Published: 8/22/2005
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 ...

Published: 4/23/2014
Authors: Yuqin Zong, Haiping Shen
Abstract: We have developed a new, reflector lamp based 2 pi transfer standard for total spectral radiant flux (TSRF) scale in the spectral range from 360 nm to 1100 nm. Correlated colour temperature of the standard lamp is 3000 K. Spectral aging rate is ±0.3 ...

7. Derivation of the MODIS Aqua Point-Spread Function for Ocean Color Bands
Published: 9/11/2008
Authors: Gerhard Meister, Yuqin Zong, Charles R. McClain
Abstract: The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Earth Observing System (EOS) Aqua platform has 9 spectral bands with center wavelengths from 412nm to 870nm that are used to produce the standard ocean color data products. Ocean scene ...

8. Detector-Based Integrating Sphere Photometry
Published: 6/24/1999
Authors: Yoshihiro Ohno, Yuqin Zong
Abstract: A new luminous flux calibration facility using a 2.5 m integrating sphere has been developed at NIST. The Absolute Integrating-Sphere Method, developed for realization of the lumen in 1995, has been applied to routine calibration measurements of lum ...

9. Determining phosphors‰ effective quantum efficiency for remote phosphor type of LED modules
Published: 12/1/2010
Authors: Arno Keppens, Yuqin Zong, Yoshihiro Ohno, Geert Deconinck, P. Hanselaer
Abstract: Without any doubt remote phosphor type of light-emitting diodes (LEDs) are gaining popularity in all kinds of solid-state lighting applications. Main reasons are the high luminous efficiency in comparison with proximate phosphor type of LED devices a ...

10. Development of LED Photometric Standards at NIST
Published: 1/1/2004
Authors: Carl C Miller, T Heimer, Yuqin Zong, Yoshihiro Ohno, D Gyula

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  • SP 250-XX: Calibration Services
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