{"title":"Outline of Illumination Optics System for LED Light Source( Evolution of Optical System and Optical Analyzing Technology on Changing to LED Light Source)","authors":"Y. Nakano, H. Sekii, T. Murakami, M. Horiuchi","doi":"10.2150/jieij.99.293","DOIUrl":"https://doi.org/10.2150/jieij.99.293","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Progress of Optical Analysis Technology( Evolution of Optical System and Optical Analyzing Technology on Changing to LED Light Source)","authors":"Hiraku Sasagawa","doi":"10.2150/JIEIJ.99.290","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.290","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Development of Optical Designs in the Mini Krypton-Shaped LED Lamp( Evolution of Optical System and Optical Analyzing Technology on Changing to LED Light Source)","authors":"Kozo Ogawa, Takeshi Hisayasu, H. Terasaki","doi":"10.2150/JIEIJ.99.297","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.297","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
in late years LED came to be adopted as a lamp for 血 e 血 n 皿 el lighting normally ， LED has high ef且ciency ， and life is long ， 血e LED can reduce elecnicity of the tunnel lighting and can reCluce the lamp exchange work ， too ． Because the LED is easy to contro 旦 the light ， the evolution of the opnical system the tunnel lighting is remarkable ， This introduces the the
{"title":"Evolution of the Optical System of Tunnel Lighting Fixture( Evolution of Optical System and Optical Analyzing Technology on Changing to LED Light Source)","authors":"M. Takenouchi, K. Furukawa","doi":"10.2150/JIEIJ.99.301","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.301","url":null,"abstract":"in late years LED came to be adopted as a lamp for 血 e 血 n 皿 el lighting normally ， LED has high ef且ciency ， and life is long ， 血e LED can reduce elecnicity of the tunnel lighting and can reCluce the lamp exchange work ， too ． Because the LED is easy to contro 旦 the light ， the evolution of the opnical system the tunnel lighting is remarkable ， This introduces the the","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Brightness Perception Throughout the Entire Visual Field","authors":"T. Watanuki, Hiroshi Takahashi, T. Irikura","doi":"10.2150/JIEIJ.99.258","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.258","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2150/JIEIJ.99.258","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this study was to clarify how the characteristics of a lighting environment at nightinfluence psychological impressions. We carried out an experiment in which participants observed images of outdoor scenes at night and evaluated their psychological impressions of the scenes. Results showed that the impression of anxiety was highly correlated with five impressions: brightness, clarity, activity, comfort, and preference.The fact that the impression of brightness had a strong influence on anxiety suggests that brightness is a major factor dominatingthe psychological impression of an outdoor space at night.Analysis of the luminance distribution on the images showed that the impression of brightness was closely correlated with the statistical values representing the intermediate range of luminance distribution on road surfaces but not with the statistics computed from the luminance distribution over the entire area of the images. These results indicate that the impression of the brightness of an outdoor space at night may be determined by the luminance levels covering the wide area of the ground surface.
{"title":"Influence of Lighting Elements in Outdoor Space at Night on the Evaluation of Visual Impressions Using Projected Pictures","authors":"Aimi Mochinaga, T. Ishida","doi":"10.2150/JIEIJ.99.250","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.250","url":null,"abstract":"The aim of this study was to clarify how the characteristics of a lighting environment at nightinfluence psychological impressions. We carried out an experiment in which participants observed images of outdoor scenes at night and evaluated their psychological impressions of the scenes. Results showed that the impression of anxiety was highly correlated with five impressions: brightness, clarity, activity, comfort, and preference.The fact that the impression of brightness had a strong influence on anxiety suggests that brightness is a major factor dominatingthe psychological impression of an outdoor space at night.Analysis of the luminance distribution on the images showed that the impression of brightness was closely correlated with the statistical values representing the intermediate range of luminance distribution on road surfaces but not with the statistics computed from the luminance distribution over the entire area of the images. These results indicate that the impression of the brightness of an outdoor space at night may be determined by the luminance levels covering the wide area of the ground surface.","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2150/JIEIJ.99.250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Museum lighting environments are carefully controlled so as not to cause any damage or deterioration to artwork. However, no method currently exists for calculating the change in color rendering properties when illuminance is changed. The purposes of this study were to clarify color rendering properties at low illuminance and to develop a new method for calculating color rendering values while taking illuminance in to account. The results showed that subjective color feelings of color samples were influenced by illuminance as well as by hue in the samples, especially by red. We defined“color quality indices”called Rx and Rxi to evaluate the new color rendering properties expressing illuminance effects and hue effects. The new indices Rx and Rxi were found to correlate significantly with the subjective results.
{"title":"Study of Museum Lighting : Optimum Lighting and Color Environment (3)","authors":"Yuki Nakajima, T. Fuchida","doi":"10.2150/JIEIJ.99.263","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.263","url":null,"abstract":"Museum lighting environments are carefully controlled so as not to cause any damage or deterioration to artwork. However, no method currently exists for calculating the change in color rendering properties when illuminance is changed. The purposes of this study were to clarify color rendering properties at low illuminance and to develop a new method for calculating color rendering values while taking illuminance in to account. The results showed that subjective color feelings of color samples were influenced by illuminance as well as by hue in the samples, especially by red. We defined“color quality indices”called Rx and Rxi to evaluate the new color rendering properties expressing illuminance effects and hue effects. The new indices Rx and Rxi were found to correlate significantly with the subjective results.","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2150/JIEIJ.99.263","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67820383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Silicon nanoparticles (Si-NPs) are useful phosphor materials for light emitting devices because of their multicolor luminescence, low production cost, and abundance. The luminescence properties of Si-NPs strongly depend on their surface condition. To improve their luminance and luminance stability, Si-NPs are combined with an alkyl group. We used ultraviolet irradiation to couple the surface of SiNPs with an organic layer consisting of an alkyl group. The surface-modified Si-NPs demonstrated bright and stable luminance in air. Our findings suggest that alkyl-passivation of Si-NPs has future practical applications for light emitting devices and displays.
{"title":"Improvement in Luminescence of Silicon Nanoparticles by Coupling with Alkyl Group","authors":"Ryoko Suzuki, Keisuke Sato, K. Hirakuri","doi":"10.2150/JIEIJ.99.245","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.245","url":null,"abstract":"Silicon nanoparticles (Si-NPs) are useful phosphor materials for light emitting devices because of their multicolor luminescence, low production cost, and abundance. The luminescence properties of Si-NPs strongly depend on their surface condition. To improve their luminance and luminance stability, Si-NPs are combined with an alkyl group. We used ultraviolet irradiation to couple the surface of SiNPs with an organic layer consisting of an alkyl group. The surface-modified Si-NPs demonstrated bright and stable luminance in air. Our findings suggest that alkyl-passivation of Si-NPs has future practical applications for light emitting devices and displays.","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2150/JIEIJ.99.245","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67819587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"道路照明の視認性評価技術( 車と道路の照明協調～さらなる交通安全を目指して～)","authors":"Satoshi Hirakawa, S. Kohko, Takashi Saito","doi":"10.2150/jieij.99.205","DOIUrl":"https://doi.org/10.2150/jieij.99.205","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67819416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Needs for Integration Technology between Vehicle Headlights and Road Lighting( Lighting Coordinations of Road and Car for Our Goal of Further Traffic Safety)","authors":"T. Hagiwara, Shōji Kobayashi","doi":"10.2150/JIEIJ.99.194","DOIUrl":"https://doi.org/10.2150/JIEIJ.99.194","url":null,"abstract":"","PeriodicalId":35437,"journal":{"name":"Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67818128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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