文献一覧: 00192341 (ISSN) - Ceek.jp Altmetrics

53 0 0 0 OA 展示照明と写真撮影用フラッシュ光が展示物の変退色に及ぼす影響について

著者: 森田政明洞口公俊山本修司片山就司
出版者: 一般社団法人照明学会
雑誌: 照明学会誌 (ISSN:00192341)
巻号頁・発行日: vol.87, no.12, pp.986-991, 2003-12-01 (Released:2011-07-19)
参考文献数: 14

2023-08-21 08:40:42
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25 0 0 0 OA 鉄道車両照明のあゆみ

著者: 笠井幹治
出版者: 一般社団法人照明学会
雑誌: 照明学会誌 (ISSN:00192341)
巻号頁・発行日: vol.64, no.11, pp.624-626, 1980-11-01 (Released:2011-07-19)
参考文献数: 6

2022-05-19 02:44:33
25 + 17 Twitter

22 0 0 0 OA 新大阪驛の照明設備に就いて

著者: 熊谷爲夫
出版者: 一般社団法人照明学会
雑誌: 照明学会雑誌 (ISSN:00192341)
巻号頁・発行日: vol.25, no.2, pp.8-25, 1941 (Released:2011-02-09)

2023-04-15 08:22:36
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21 0 0 0 OA 低照度下における, 眼の色の違いによる視力と色の識別能力の差異の検討

著者: 中山和美乾正雄佐藤仁人國友美希
出版者: 一般社団法人照明学会
雑誌: 照明学会誌 (ISSN:00192341)
巻号頁・発行日: vol.84, no.2, pp.100-106, 2000-02-01 (Released:2011-07-19)
参考文献数: 3
被引用文献数: 1 2

This study was conducted to clarify the difference in visual acuity and color recognition between the darker color eyes of Japanese and the fairer color eyes of Westerners at lower illuminance. A series of experiments were carried out in an experimental room in which the illuminance level could be changed. The parameters were the illuminance on a desk and the color of the subject's eyes. Ten illuminance levels, which increased geometrically from 0.001 to 30 lx, were used. The subjects comprised two groups having different eye colors. One group was made up of Japanese, who have dark eyes, and the other Europeans and North Americans with fair eyes. At each illuminance level, after 7 minutes for adaptation, each subject's visual acuity was tested using 4 types of color Landolt rings and color discrimination was tested using 12 different-color cards. The following results were obtained.(1) For a black Landolt ring on a white background, there was very little difference between the two groups' visual acuity.(2) For a green Landolt ring on a blue background, the visual acuity of the dark-eyes group was remarkably lower than that of the fair-eyes group.(3) In the color discrimination test, at an illumination of 1 lx or lower, the dark-eyes group confused colors more than the fair-eyes group.Accordingly, the differences in visual acuity and color discrimination between the two eye-color groups were only in color discrimination at lower illuminance.

2023-12-03 21:34:58
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20 0 0 0 OA 発光ダイオードの高速パルス電流に対する応答特性

著者: 藤澤泰充橋本守荒木勉
出版者: 一般社団法人照明学会
雑誌: 照明学会誌 (ISSN:00192341)
巻号頁・発行日: vol.81, no.8, pp.656-663, 1997-08-01 (Released:2011-07-19)
参考文献数: 10

Temporal emission characteristics of light emitting diodes (LEDs) for high-speed repetitive current have been investigated. For this purpose, three commercially available LEDs (red, green and blue LEDs) were prepared. Each LED was driven by a specially designed pulse generator constructed using an avalanche transistor to generate high-speed pulse current. Resultant injection current showed a nanosecond duration pulse with peak height of a few amperes. Time responses and spectral profiles of the emission waveforms were measured with respect to the pulsed current. Resultant light durations of the pulsed LEDs were in the nanosecond range. When the injection current increased, the peak emission intensity of the LED increased without saturation. In particular, the ultraviolet component of the blue LED became evident, resulting in peak emission intensity of 30 m W with duration of 5 ns. Lifetime of the pulse-operated LED was over 1O 10 shots, which corresponds to 140 hours running at repetition frequency of 20 kHz.