著者

田辺 稔 木下 健一

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

pp.180000579, (Released:2019-04-26)

参考文献数

17

著者

近藤 直久 白尾 和久 平岩 国弘

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.79, no.Appendix, pp.239, 1995-03-31 (Released:2011-07-19)

参考文献数

3

著者

亀山 雅俊 近藤 直久 平岩 國弘 吉川 孝次郎 白尾 和久

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.79, no.3, pp.120-123, 1995-03-01 (Released:2011-07-19)

参考文献数

3

著者

東 洋邦 佐々木 淳 古賀 翔大 羽生田 有美

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.100, no.6, pp.234-237, 2016-06-01 (Released:2016-10-01)

参考文献数

7

被引用文献数

2

著者

武内 徹二

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.6, pp.493-499, 1997-06-01 (Released:2011-07-19)

参考文献数

16

被引用文献数

1 2

著者

清水 正則 岡村 泉 井上 猛

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.74, no.Appendix, pp.72, 1990-03-30 (Released:2011-07-19)

参考文献数

1

著者

矢野 正 金谷 末子 市川 一夫

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.77, no.6, pp.296-303, 1993-06-01 (Released:2011-07-19)

参考文献数

15

被引用文献数

7 7

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It is well known that older people are more sentitive to discomfort glare than young people. This sensitivity is one of the visual problems that go with aging. On the relationship between discomfort glare and an observer's age, Bennett has already reported that older people produce lower BCDs (Borderline between Comfort and Discomfort) than young people. It is also known that the discomfort glare is affected by the color temperature of the light sources used, but this effect has not been clarified quantitatively.In order to clarify the quantitative relationship between the discomfort glare and the color temperature of light sources, we conducted a series of experiments on the discomfort glare for light sources with different color temperatures. The results are as follows (1) Both old and young observers are more sensitive to discomfort glare for the light sources with high color temperatures than for those with low color temperatures.(2) The effects of the color temperatures on the discomfort glare are about the same for both old and young observers.(3) The spectral distribution of light sources has no effect on the discomfort glare, if these color temperatures are constant.

著者

鵜飼 一彦

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.80, no.7, pp.463-466, 1996-07-01 (Released:2011-07-19)

参考文献数

7

著者

大久保 和明 側垣 博明

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.77, no.6, pp.364-370, 1993-06-01 (Released:2011-07-19)

参考文献数

4

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For reflecting or transmitting object colours, the CIE tristimulus vslues of a colour stimulus are obtained by multiplying, at each wavelength, the value of the weigthing factors by that of each of the spectral reflectance or the spectral transmittance of the object colour. Then each set of products is integrated over the wavelength range corresponding to the entire visible spectrum, 380 to 780nm. The integration may be carried out by numerical summation at a wavelength interval, equal to 5nm. The weigthing factors are obtained by multiplying, at each wavelength, the value of the relative spectral power distribution of the illuminant by the CIE colour-matching functions.In practical applications, all the required data may not be available because of measurement at greater intervals intervals than 5nm, equal to the 10nm or 20nm intervals data. In this paper, the method for the calculation of the weigthing factors for the 10nm or 20nm intervals measurenent data using interpolation is reported.

著者

上野 隆士

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.77, no.11, pp.706-708, 1993-11-01 (Released:2011-07-19)

著者

沖 允人 中村 洋

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.74, no.4, pp.217-221, 1990-04-01 (Released:2011-07-19)

参考文献数

6

著者

安西 良矩 大久保 啓介

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.74, no.5, pp.286-291, 1990-05-01 (Released:2011-07-19)

参考文献数

59

著者

江湖 俊介 阿山 みよし

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.100, no.10, pp.449-454, 2016-10-01 (Released:2016-12-01)

参考文献数

17

被引用文献数

1

---

The previous study reported by some members of the Research Group for Glare Evaluation of Outdoor LED Light Sources established in the Illuminating Engineering Institute of Japan, showed that luminance based photometric quantities have a stronger correlation to discomfort glare evaluation than those based on equivalent veiling luminance or illuminance at the observer’s eye. They proposed the m_DGI as an index to assess the degree of discomfort glare. However, the test lights that cause strong discomfort glare were not examined there.In this study, we conducted a subjective evaluation experiment using seven types of LED streetlights including those of higher luminance in the outer environment similar to the previous study. The results revealed several findings. First, discomfort glare is strongly felt when the positional relationship between the pedestrian and lighting fixtures is in a certain range; second, light sources with spatially non-uniform luminance distribution cause a strong discomfort glare; third, GR for sports-field lighting is not suited for discomfort glare evaluation of pedestrian zones; and fourth, the relation found in the previous study was confirmed.In addition, we confirmed the versatility of m_DGI from weak to strong discomfort glare evaluation. We proposed a new index m_GR calculated using equivalent veiling luminance. Correlation to the discomfort glare evaluation is worse than m_DGI, our data indicate that m_GR is applicable to estimate a degree of discomfort glare in practical situations.

著者

大山 能永 廣川 純一 山口 亮 井川 憲男 望月 菜穂子 似鳥 雅則

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.86, no.Appendix, pp.136-137, 2002 (Released:2011-07-19)

著者

坂上 美香 明石 行生 梅野 千絵 八木 昭宏

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.5, pp.385-390, 1997-05-01 (Released:2011-07-19)

参考文献数

15

被引用文献数

4 8

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We compared the concentration levels of subjects under several lighting conditions in which the ratio of the task illuminance to the ambient illuminance was varied.In order to evaluate the subjects' levels of concentration, subjective appraisals and measurements of the subjects' lambda responses (one of the brain's responses) were carried out. The results showed a close correlation between the subjective appraisals and the measured lambda responses.We found that lighting in which the ratio of the ambient illuminance to the task illuminance was from 0.02 to 0.3 provided the optimum conditions for concentration.

著者

関根 征士

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.80, no.5, pp.354-363, 1996-05-01 (Released:2011-07-19)

参考文献数

28

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The correlated color temperature (CCT) of total skylight, which comes to a horizontal plane from all sky components, varies hourly with atmospheric transmittance pv and the amount of cloud m. The parameter pvcaused by visible solar radiation is calculated from the atmospheric transmittance based on direct solar radiation. A new practical formula for estimating the CCT of the total skylight is proposed. Using the formula, the CCTs of the total skylight at 14 areas in Japan are calculated from the parameter pv and the number of days that is calculated from the parameter m. Consequently, it is estimated that variation in the CCT of daylight is 5900K to 8000K. The mean CCT of total skylight is 6800K, where the mean CCT of global light is 5900K and that of the total skylight for the parameter m=0 is 8000K.

著者

野口 公喜 白川 修一郎 駒田 陽子 小山 恵美 阪口 敏彦

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.85, no.5, pp.315-322, 2001-05-01 (Released:2011-07-19)

参考文献数

25

被引用文献数

2 2

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The effects of simulating dawn lighting with an ordinary ceiling light on the quality of awakening were investigated. The subjects were healthy men, aged 24-27. After sleep for about 7 hours with polysomnographic recordings in a climatic chamber kept at a temperature of 25t and a relative humidity of 50%, each subject was awakened by an alarm. For the 30 minutes immediately before the subject was awakened, the illumination in the chamber was gradually increased, simulating the condition of waking up as the sun rises. Alpha attenuation test, measuring blood pressure and awakening feelings were conducted after awakening.The time of sleep stage 2 appearing during the 30-minute simulating dawn lighting was significantly less (p<0.05; Wilcoxon test) than during typical waking conditions (i. e., waking up in the dark), while the time of stage W was higher (p=0.0796). The mood after awakening in the simulatig dawn lighting condition was significantly better (p<0.05). There were no significant differences in the alpha attenuation coefficients and blood pressures after awakening between the two conditions.These results suggest that simulating dawn lighting arouses subjects to light sleep, which makes awakening less sudden and more pleasant. There was no evidence that the light sleep immediately before awakening decreased the subjects' cerebral cortex activity or sympathetic nervous activity after awakening.

著者

芥野 賢一

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.89, no.10, pp.737-738, 2005-10-01

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The lighting of the Wonder Wheel Pavilion at the AICHI EXPO 2005, JAPAN was planned with the following in mind :

著者

森田 和元

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.8, pp.507-513, 2000-08-01 (Released:2011-07-19)

参考文献数

11

被引用文献数

1 2

---

At dusk, the change in brightness of peripheral vision is striking. Such a sudden change in the viewing environment could affect the vision of a driver, possibly leading to an accident. I investigated the occurrence of traffic accidents at dusk by statistical analysis to determine whether changes in the viewing environment at dusk affect the accident rate. Dusk is considered to be the time of civil twilight, which is about 30 minutes in Tokyo. The analysis was done under certain conditions; for example, the target area was limited so that the time period for dusk was basically the same. Furthermore, the effect of the day of the week on the occurrence rate was investigated. I found no tendency for traffic accidents to occur with higher frequency at dusk. Moreover, the analysis of the accident rate of the day of the week showed that the accident rate is rather related to the traffic volume.

著者

田渕 義彦 淺見 耕一 松島 公嗣

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.71, no.Appendix, pp.73-73, 1987-03-25 (Released:2011-07-19)

参考文献数

1