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Author: yuqin zong

Displaying records 11 to 20 of 33 records.
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11. Radiometer standard for absolute responsivity calibrations from 950 nm to 1650 nm with 0.05% (k = 2) uncertainty
Published: 6/2/2009
Authors: George P Eppeldauer, Howard W Yoon, Yuqin Zong, Thomas C Larason, Allan W. Smith, M. Racz
Abstract: A sphere-input transfer-standard detector has been developed to calibrate detectors and radiometers for absolute spectral power, irradiance, and radiance responsivity in the near-IR range with uncertainties similar to those of silicon trap-detector c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900973

12. NIST SPECTRALLY TUNABLE LIGHTING FACILITY FOR COLOR RENDERING AND LIGHTING EXPERIMENTS
Published: 5/29/2009
Authors: Carl C Miller, Yoshihiro Ohno, Wendy L Davis, Yuqin Zong, Kevin Dowling
Abstract: The National Institute of Standards and Technology has developed a spectrally tunable lighting facility to allow state-of-the-art vision experiments on color rendering and lighting. The facility is composed of two cubicles, each lit by a spectrally ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903085

13. NEW PRACTICAL METHOD FOR MEASUREMENT OF HIGH-POWER LEDS
Published: 10/1/2008
Authors: Yuqin Zong, Yoshihiro Ohno
Abstract: The measurement of high-power light emitting diodes (LEDs) has been difficult because they are highly sensitive to thermal operating conditions, and there has been a lack of common methods that can be used by both LED manufactures and users to acquir ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842561

14. f1‰ EVALUATION AND MEASUREMENT COMPARISON
Published: 10/1/2008
Authors: Jiangen PAN, Haiping SHEN, Yuqin Zong, Yoshihiro Ohno
Abstract: The mismatch of spectral responsivity to the CIE V(lambda) function, i. e., the f1‰ index, is the most critical characteristic of photometers and tristimulus colorimeters. The f1‰ value varies with measurement conditions, which is often omi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842554

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842607

16. PRACTICAL METHOD FOR MEASUREMENT OF AC-DRIVEN HIGH-POWER LEDS
Published: 7/14/2008
Authors: Yuqin Zong, Yoshihiro Ohno, Pei-ting Chou
Abstract: Alternating-current (AC) driven high-power LEDs are available and used in SSL products. AC LEDs operate directly from a mains supply and thus have advantages in simplifying product design, increasing product reliability, and extending product lifetim ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903044

17. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841127

18. Evaluation of a Portable Hyperspectral Imager for Medical Imaging Applications
Published: 10/2/2007
Authors: David W Allen, Maritoni Abatayo Litorja, Steven W Brown, Joseph Paul Rice, Yuqin Zong
Abstract: Portable hyperspectral imagers are becoming commonly available as a commercial product. A liquid crystal tunable filter based CCD imager was evaluated and characterized for spectral stray light using a tunable laser facility. The hyperspectral imag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841115

19. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841072

20. Realization of total spectral radiant flux scale and calibration service at NIST
Published: 7/4/2007
Authors: Yuqin Zong, Yoshihiro Ohno
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101809



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