The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Setsuhisa Tanabe - One of the best experts on this subject based on the ideXlab platform.
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Spectral Power Distribution and quantum yield of sm3 doped bismuth tellurite glass under the excitation of violet led
Spectroscopy and Spectral Analysis, 2007Co-Authors: Xueying Wang, Changmin Li, Dianlai Yang, Setsuhisa TanabeAbstract:: A new method for measuring the Spectral Power Distribution in Sm3+-doped bismuth tellurite glass with higher refractive index and lower phonon energy by using integrating sphere was introduced and designed for the first time. Fluorescence measurement system was constituted by integrating sphere of 10-inch diameter, which was connected to a DDC detector. A standard halogen lamp was used to calibrate the measurement system and the auxiliary standard halogen lamp was employed for collating inner change in integrating sphere. The total radiant flux, total luminous flux and total quantum yield were calculated by luminous flux Distribution and photon Distribution, which were derived from Spectral Power Distribution, and the values were 55 microW, 0.02 lm and 4.07%, respectively. In the present paper, the integrating sphere-method was applied to measure the luminescence parameters of the multichannel transition emissions in Sm3+, and it was considered as an accurate way to characterize luminescence parameters for luminescence and laser material.
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Spectral Power Distribution and quantum yields of sm3 doped heavy metal tellurite glass under the pumping of blue lighting emitting diode
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007Co-Authors: X Y Wang, Setsuhisa Tanabe, C M Li, X J Li, J Y YuAbstract:Abstract Quantum yields for multichannel transition emissions have been determined in Sm3+-doped heavy metal tellurite glass under the pumping of blue lighting emitting diode for the first time. To achieve this goal, the necessary fluorescence spectra were measured and calibrated in an integrating sphere, which was connected to a CCD detector with a 400 μm-core optical fiber. The Spectral Power Distribution of the sample under the blue LED pumping was derived from the measured spectra firstly, and then the quantum yields for the visible emissions of Sm3+ were calculated based on the Distribution and the total quantum yields in visible region is 7.55%. For accurate measurements, integrating sphere method is proved to be a reliable and reproducible way to characterize luminescence and laser materials.
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Spectral Power Distribution and quantum yields of a eu3 doped heavy metal tellurite glass under the pumping of a violet light emitting diode
Measurement Science and Technology, 2007Co-Authors: Xueying Wang, Changmin Li, Setsuhisa TanabeAbstract:Quantum yields for multichannel transition emissions have been determined in a Eu3+-doped heavy metal tellurite glass under the pumping of a violet light emitting diode (LED) for the first time. To achieve this goal, the necessary fluorescence spectra were measured and calibrated in an integrating sphere, which was connected to a CCD detector with a 400 µm core optical fibre. The Spectral Power Distribution of the sample under the violet LED pumping was derived from the measured spectra first; then the quantum yields for the visible emissions of Eu3+ were calculated based on the Distribution, and the total quantum yield is 4.36%. For accurate measurements, an integrating sphere coupled with a CCD detector is proven to be a reliable and reproducible way to characterize luminescence and laser materials.
Remis Gaska - One of the best experts on this subject based on the ideXlab platform.
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Deep UV light emitting diode technology for compact point-of-use water disinfection systems
Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo NSTI-Nanotech 2013, 2013Co-Authors: I. Gaska, S. Smetona, T. Bettles, I Shturm, O. Bilenko, Yu Bilenko, Max Shatalov, Michael Shur, Remis Gaska, Z. GleasonAbstract:Deep Ultraviolet Light Emitting Diodes (DUV LEDS) have shown their effectiveness in microbial sterilization of drinking water. These semiconductor-based DUV light sources offer narrow Spectral Power Distribution (
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New UV Technology for Point-of-Use Water Disinfection
Clean Technology, 2010Co-Authors: Yu Bilenko, I Shturm, O. Bilenko, Max Shatalov, Remis GaskaAbstract:A new class of semiconductor-based Deep Ultraviolet Light Emitting Diodes (DUV LEDs) is emerging as a disruptive technology for point-of-use water disinfection. Sensor Electronic Technology, Inc. has pioneered compact DUV lamps based on III-Nitride semiconductors (GaN, AlN, InN and their alloys). These semiconductor-based DUV light sources offer narrow Spectral Power Distribution (
J Y Yu - One of the best experts on this subject based on the ideXlab platform.
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Spectral Power Distribution and quantum yields of sm3 doped heavy metal tellurite glass under the pumping of blue lighting emitting diode
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007Co-Authors: X Y Wang, Setsuhisa Tanabe, C M Li, X J Li, J Y YuAbstract:Abstract Quantum yields for multichannel transition emissions have been determined in Sm3+-doped heavy metal tellurite glass under the pumping of blue lighting emitting diode for the first time. To achieve this goal, the necessary fluorescence spectra were measured and calibrated in an integrating sphere, which was connected to a CCD detector with a 400 μm-core optical fiber. The Spectral Power Distribution of the sample under the blue LED pumping was derived from the measured spectra firstly, and then the quantum yields for the visible emissions of Sm3+ were calculated based on the Distribution and the total quantum yields in visible region is 7.55%. For accurate measurements, integrating sphere method is proved to be a reliable and reproducible way to characterize luminescence and laser materials.
Xueying Wang - One of the best experts on this subject based on the ideXlab platform.
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Spectral Power Distribution and quantum yield of sm3 doped bismuth tellurite glass under the excitation of violet led
Spectroscopy and Spectral Analysis, 2007Co-Authors: Xueying Wang, Changmin Li, Dianlai Yang, Setsuhisa TanabeAbstract:: A new method for measuring the Spectral Power Distribution in Sm3+-doped bismuth tellurite glass with higher refractive index and lower phonon energy by using integrating sphere was introduced and designed for the first time. Fluorescence measurement system was constituted by integrating sphere of 10-inch diameter, which was connected to a DDC detector. A standard halogen lamp was used to calibrate the measurement system and the auxiliary standard halogen lamp was employed for collating inner change in integrating sphere. The total radiant flux, total luminous flux and total quantum yield were calculated by luminous flux Distribution and photon Distribution, which were derived from Spectral Power Distribution, and the values were 55 microW, 0.02 lm and 4.07%, respectively. In the present paper, the integrating sphere-method was applied to measure the luminescence parameters of the multichannel transition emissions in Sm3+, and it was considered as an accurate way to characterize luminescence parameters for luminescence and laser material.
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Spectral Power Distribution and quantum yields of a eu3 doped heavy metal tellurite glass under the pumping of a violet light emitting diode
Measurement Science and Technology, 2007Co-Authors: Xueying Wang, Changmin Li, Setsuhisa TanabeAbstract:Quantum yields for multichannel transition emissions have been determined in a Eu3+-doped heavy metal tellurite glass under the pumping of a violet light emitting diode (LED) for the first time. To achieve this goal, the necessary fluorescence spectra were measured and calibrated in an integrating sphere, which was connected to a CCD detector with a 400 µm core optical fibre. The Spectral Power Distribution of the sample under the violet LED pumping was derived from the measured spectra first; then the quantum yields for the visible emissions of Eu3+ were calculated based on the Distribution, and the total quantum yield is 4.36%. For accurate measurements, an integrating sphere coupled with a CCD detector is proven to be a reliable and reproducible way to characterize luminescence and laser materials.
Junji Morishita - One of the best experts on this subject based on the ideXlab platform.
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su e i 16 comparison of the blue part of the Spectral Power Distribution in a medical liquid crystal display for different color temperature settings
Medical Physics, 2014Co-Authors: Hiroshi Akamine, Taku Kuramoto, Toyoyuki Kato, S Awamoto, Y Nakamura, Noriyuki Hashimoto, Junji MorishitaAbstract:Purpose: The effects of blue light exposure on visual fatigue have received much attention in recent years. There have been attempts to reduce the blue part of the Spectral Power Distribution in a display's output by using commercial films and glasses. However, reducing the blue part of the Spectral Power Distribution in medical liquid-crystal displays (LCDs) by changing the color temperature settings may prove to be a simpler solution. Our study aimed to quantitatively compare the blue part of the Spectral Power Distribution of a medical LCD in different color temperature settings. Materials and Methods: We used two color LCDs (RadiForce RX340, 400 cd/m2, EIZO). The Spectral Power Distribution, chromaticity, and correlated color temperature were measured for LCDs with different color temperature settings (6500, 7500, and 8500 K). The default color temperature setting of the medical LCDs used in this study was 7500 K. A spectroradiometer (CS-2000, KONICA MINOLTA) and original gray-scale test patterns with 18 different luminance levels were used for the measurements. Results: The blue parts of the Spectral Power Distribution (380–495 nm) were different for each color temperature setting. The integrated Power values over the blue of the Spectral Power Distribution decreased by 9% from 8500 to 7500 K and 13% and from 7500 to 6500 K. The correlated color temperature changed by approximately 1000 K depending on the color temperature setting. The difference in the chromaticity was 0.011 between 8500 and 7500 K and between 7500 and 6500 K. Conclusion: Our results quantitatively indicate that the blue part of the Spectral Power Distribution of the medical LCDs tested varies for different settings of color temperature.
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SU‐E‐I‐16: Comparison of the Blue Part of the Spectral Power Distribution in a Medical Liquid‐Crystal Display for Different Color Temperature Settings
Medical Physics, 2014Co-Authors: Hiroshi Akamine, Taku Kuramoto, Toyoyuki Kato, S Awamoto, Y Nakamura, Noriyuki Hashimoto, Junji MorishitaAbstract:Purpose: The effects of blue light exposure on visual fatigue have received much attention in recent years. There have been attempts to reduce the blue part of the Spectral Power Distribution in a display's output by using commercial films and glasses. However, reducing the blue part of the Spectral Power Distribution in medical liquid-crystal displays (LCDs) by changing the color temperature settings may prove to be a simpler solution. Our study aimed to quantitatively compare the blue part of the Spectral Power Distribution of a medical LCD in different color temperature settings. Materials and Methods: We used two color LCDs (RadiForce RX340, 400 cd/m2, EIZO). The Spectral Power Distribution, chromaticity, and correlated color temperature were measured for LCDs with different color temperature settings (6500, 7500, and 8500 K). The default color temperature setting of the medical LCDs used in this study was 7500 K. A spectroradiometer (CS-2000, KONICA MINOLTA) and original gray-scale test patterns with 18 different luminance levels were used for the measurements. Results: The blue parts of the Spectral Power Distribution (380–495 nm) were different for each color temperature setting. The integrated Power values over the blue of the Spectral Power Distribution decreased by 9% from 8500 to 7500 K and 13% and from 7500 to 6500 K. The correlated color temperature changed by approximately 1000 K depending on the color temperature setting. The difference in the chromaticity was 0.011 between 8500 and 7500 K and between 7500 and 6500 K. Conclusion: Our results quantitatively indicate that the blue part of the Spectral Power Distribution of the medical LCDs tested varies for different settings of color temperature.
