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You searched on: Author: yoshihiro ohno

Displaying records 21 to 30 of 175 records.
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21. Standardization Activities for Solid State Lighting in the USA
Published: 5/29/2009
Author: Yoshihiro Ohno
Abstract: In support of the U.S. Department Energy s Energy Star program for solid state lighting, a series of standards for solid state lighting products have been developed in the USA. The standards published related to measurement and color include ANSI-NEM ...

22. Illumination with enhanced contrast as a visualization tool for clinical diagnostics and surgery
Published: 2/26/2009
Authors: Maritoni Abatayo Litorja, Steven W Brown, Yoshihiro Ohno, Chungsan Lin
Abstract: The requirements for diagnostic and surgical lighting have remained largely unchanged over the past several years illumination level, glare, shadow and tissue heating reduction are the dominant factors in choosing a lighting system. Since human visu ...

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 ...

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 ...

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 ...

26. Color Quality and Spectra
Published: 7/1/2008
Authors: Yoshihiro Ohno, Wendy L Davis
Abstract: Color quality, including white light chromaticity and color rendering performance, as well as luminous efficacy of radiation, for illumination sources are introduced. Spectral design considerations for white LED and solid-state lighting products to ...

27. Spectral Colour Measurement, ed. by J. Schanda
Published: 1/1/2008
Author: Yoshihiro Ohno

28. 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 ...

29. Realization of total spectral radiant flux scale and calibration service at NIST
Published: 7/4/2007
Authors: Yuqin Zong, Yoshihiro Ohno

30. -Measurement of Solid-State Lighting Products,-
Published: 1/1/2007
Authors: Yoshihiro Ohno, Carl C Miller

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  • SP 250-XX: Calibration Services
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