著者

佐藤 千穂

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.82, no.8, pp.530-537, 1998-08-01 (Released:2011-07-19)

参考文献数

9

被引用文献数

5 5

---

It has been reported that color perception of bluish lights changes with age because of a considerable decrease of the sensitivity in short-wavelength region caused by the yellowing of the crystalline lens. However there is an opinion that the color perception of aged-people is compensated by chromatic adaptation since the yellowing of the crystalline lens gradually grows across the life-span.In order to clarify the change in color perception caused by aging, I conducted two experiments. First, the 100-hue test of the Japan Color Research Institute was performed to 70 observers aged from 20s to 70s. Second, an experiment of color naming to 16 color samples using Natural Color System was done to 200 observers aged from 10s to 50s.As a result of the 100-hue test, the age-related decline of color discrimination properties to the reddish-purple colors was admitted whereas color discrimination properties to the bluish colors did not dropped. On the other hand, the experiment of color naming showed that there was no age-related change of color perception.

著者

井塚 秀明 森川 三枝子 森沢 稔 森 明 中村 昇 大室 俊朗

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.76, no.Appendix, pp.141, 1992-03-17 (Released:2011-07-19)

著者

社団法人日本照明委員会

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.94, no.4, pp.240-244, 2010-04-01

参考文献数

8

被引用文献数

4

---

Using light emitting diodes (LEDs) as a light source for lighting has been increasing in the 21 century. It has become necessary to prepare safety standard before the problem will occur. Commission Internationale de l'Eclairage (CIE), International Electrotechnical Commission and Japanese Industrial Standards Committee already prepared safety standard or technical standard of lights and lighting systems including LEDs. However, there are many problems of the optical radiometry of LEDs, and unknown effects of non-visual physiological reaction induced by irradiation using LEDs. This paper describes these problems and future works.

著者

藤岡 茂 山本 啓史

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.82, no.9, pp.753-755, 1998-09-01 (Released:2011-07-19)

著者

青木 慎一 倉光 修

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.91, no.4, pp.195-198, 2007-04-01

被引用文献数

2

---

Studies of insect vision have led to the identification of light wavelengths that contribute to attracting them. Luminaires that attract fewer insects have been developed by excluding those parts of these wavelengths which do not influence the human vision significantly. Also, it is important to numerically determine the capacity of light to attract insects, in evaluating this capacity regarding various light sources and luminaires. Proposals have been put forward to define a new index of insect attraction based on light spectral sensitivity, intensity, luminaire efficiency etc.

著者

落合 太郎

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.94, no.3, pp.192-197, 2010-03-01

参考文献数

2

被引用文献数

2

---

To colour-deficient drivers, red and yellow traffic signals are indistinguishable. The solution is to mark an "X" on red signals that can be seen at 100m only by colour deficient drivers, while drivers with normal vision cannot see it. This elegant design exhibits the inverse "Ishihara's Test" concept; an ironic phenomenon in which the colour blind show relatively higher luminous efficiency in the shorter range (i.e., blue) than in the longer range (i.e., red) of wavelengths, which means that the similarly observed colour combination of red and red purple will be observed as if strongly contrasted "opaque and dull brown" and "clear blue." Then, the experiment found a specific "X" pictograph that all colour blind persons could observe but that none of the people with normal vision could see from 100m.

著者

山中 泰彦 森田 政明 洞口 公俊 山吉 孝雄 杉浦 渉

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.2, pp.119-126, 2003-02-01 (Released:2011-07-19)

参考文献数

18

被引用文献数

4 3

---

The effects of germicidal radiation on water has shown many good properties, and the method is applied to several purposes including and purifying drinking water, pure disinfecting water. In this paper we discuss the theoretical and practical results of germicidal effects on both of using a cylindrical germicidal tank with a germicidal lamp in the center on still and flowing water. We are describe the water transmission properties that we developed for the germicidal radiation. The four tables below show the results of our experiments.Table 1 Index of natural water and permeation rate (τ)Table 2 The properties of dissolving material in cooling tower waterTable 3 Germicidal time for E-coliTable 4 Experimental results of twin-type circulation water disinfection

著者

原 直也

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.91, no.10, pp.682-683, 2007-10-01

著者

綿引 典子

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.97, no.1, pp.31-35, 2013-01-01 (Released:2019-12-20)

---

The museum achieved LED exhibition lighting that satisfies the following: 1 High environmental quality for preservation of exhibited materials; 2 Flexibility to allow variable display; 3 Reduction in power consumption, CO_2 emissions and maintenance cost.

著者

多田村 克己 中前 栄八郎

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.8, pp.385-391, 1995-08-01 (Released:2011-07-19)

参考文献数

16

被引用文献数

1

---

We describe a method for rendering the surface of water, focusing on the problem of realistic color rendering. This method takes into account scattered and absorbed light, interreflection between objects located above the water surface and between those in the water, the shape of the bottom surface of the water and shadows cast on/under the water surface. It can be applied to point light sources with various characteristics of luminous intensity distributions and spectra. Two examples show the effect of the depth and quality of water on this color, comparing simulations with photograph of a pool. They suggest that this method is useful for designing lighting for scenery surrounding water

著者

本郷 一隆 宮内 真人 林 健太郎 興梠 政広 秋永 良典 芹川 聖一

出版者

The Illuminating Engineering Institute of Japan

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.99, no.11, pp.589-593, 2015-11-01 (Released:2016-02-01)

参考文献数

6

---

Blue LEDs are now mass-produced, and road traffic signal heads using LED systems are being used. LED signal heads have advantages such as energy savings and a long life. However, newly proposed LED signal heads have difficulty reducing problems such as the washout phenomenon. In this paper, we have proposed reducing the washout phenomenon of LED signal heads by using LED element 192 and the low-reflection black plate called a“phantom board”on a blank area between the elements. On the basis of light intensity distribution and luminance uniformity measurements, it was confirmed that the LED signal head we proposed satisfies the conditions described in the traffic signal lighting specifications of the National Police Agency. The visibility of the signal head was improved, as apparent from the before and after improvement pictures taken in the morning and the evening when the sun was at a low altitude and as a result of the phantom ratio.

著者

山田 雅弘

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.71, no.12, pp.712-718, 1987-12-01 (Released:2011-07-19)

参考文献数

26

被引用文献数

1

著者

黄川田 翔 吉田 直人 佐野 千絵

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.2, pp.74-81, 2016-02-01 (Released:2016-06-01)

参考文献数

27

被引用文献数

1 1

---

Illuminance and exposure time are controlled to avoid rapid deterioration of museum objects. However, it is possible that the effect of harmful ultra-violet rapiation and visible light on objects is evaluated incorrectly by integrated illuminance. In this report, an evaluation method for light exposure levels for museum objects is discussed. Exposure tests of textiles with different light sources were conducted, and the progress of deterioration of the textiles was evaluated with two different light exposure level indexes : integrated illuminance and effective radiant exposure. The results show that effective radiant exposure can be used to evaluate light exposure levels causing damage to textiles more accurately. Furthermore, this paper proposes a new method that corrects illuminance and integrated illuminance. The new method easily improves the precision of evaluating light exposure levels with conventional integrated illuminance.

著者

八手又 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.83, no.9, pp.700-703, 1999-09-01 (Released:2011-07-19)

参考文献数

1

著者

河合 悟

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.3, pp.204-209, 1987-03-01 (Released:2011-07-19)

参考文献数

8

著者

宮内 真人 下村 輝夫 興梠 政広 進藤 直行

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.82, no.11, pp.917-920, 1998-11-01 (Released:2011-07-19)

参考文献数

8

著者

上村 佐四郎 余谷 純子

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.4, pp.262-267, 2003-04-01 (Released:2011-07-19)

参考文献数

11

被引用文献数

1 1

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.71, no.6, pp.333-338, 1987-06-01 (Released:2011-07-19)

参考文献数

11

被引用文献数

3 8

---

The clear sky light is generated through the process that the direct sunlight is successively scattered by the air and aerosol in the turbid atmosphere and repeatedly reflected by the earth's surface.The scattering-transmitting functions of the direct sunlight and the reflected light from the earth's surface were set up theoretically and the spectral power distributions of the clear sky light were estimeted.It became clear how following factors effect the change of the clear sky light respectively.(1) The scattering light by the air and that by the aerosol.(2) The first scattering light and the higher order scattering light than the first.(3) The reflected light from the earth's surface.

著者

植木 雅哉

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.12, pp.886-891, 2002-12-01 (Released:2011-07-19)

参考文献数

5

著者

石井 リーサ明理

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.6, pp.273-276, 2005-06-01

---

ノートル・ダム大聖堂は, 世界文化遺産のひとつとして世界有数の観光地であると同時に, カトリック司教座教会として現在もフランスで重要な宗教的・政治的地位を誇る.その正面にあたる西側外壁面のライトアップが, ミレニアムを記念して再整備された.パリ市が指揮する整備事業チームに, 専門家として2社の照明デザイナーが加わり, 延べ14年の歳月を掛け, 2002年クリスマス・イブ前日に点灯式が行われた.