Journal of Science and Technology in Lighting
Online ISSN : 2432-3233
Print ISSN : 2432-3225
ISSN-L : 2432-3233
最新号
選択された号の論文の11件中1~11を表示しています
Lighting Photo Albums
Foreword
Special Articles UV Technology, In Light of the Recent Coronavirus Infection Spread
Foreword
Translated Papers
Regular Section
Paper
Research Note
  • Adrienne Kline, Donald Kline, Theresa Kline
    2021 年 44 巻 p. 25-33
    発行日: 2021/03/31
    公開日: 2021/03/31
    [早期公開] 公開日: 2020/07/21
    ジャーナル フリー

    Diminished visibility in dim light degrades performance and safety on real-world tasks that depend on the timely detection of visual targets. The goals of this paper are to: 1. review factors that affect nighttime visibility, with an emphasis on driving, 2. provide the reader with online access to an automated modified Adrian/CIE visibility level (VL) calculator (VLC), and 3. suggest future research for enhancing the objective measurement of visibility. Recognizing that luminance contrast is the primary sensory determinant of nighttime visibility, several contrast-detection models have been proposed to quantify visibility in dim lighting. Of these, the Adrian (1989) model accounts for comparatively more of the important variables and has been the most widely accepted. The mathematical steps for calculating target VL in the modified Adrian/CIE model are presented and the VLC user interface is explained in step-by-step order. The VLC provides an easy-to-use tool for calculating target VL. Several additional factors that affect VL that are not currently included in the model provide important research opportunities for enhancing the measurement of target visibility in nighttime conditions. The VLC is an open-access application intended to foster the measurement of VL in professional practice and to foster research to advance the utility of the Adrian/CIE model.

Translated Papers
  • Mitsuhiro Matsumoto
    2021 年 44 巻 p. 34-44
    発行日: 2021/03/31
    公開日: 2021/03/31
    ジャーナル フリー

    We evaluated the performance of light focus in an existing otoscope with a headlight employing an LED source. The mechanism of the otoscope was shown, and a coordinate system was set in the otoscope to evaluate the light-focusing performance. Experimental equipment based on the set coordinate system was built using the existing otoscope and headlight. We demonstrated experimental methods for measuring illuminance at the narrow mouth in the otoscope using the built experimental equipment. In the experiments conducted using the experimental methods, the performance of light focus in the existing otoscope was evaluated by measuring the illuminance. The optimal new otoscope for focusing light was designed using a headlight employing the LED source. The otoscope was built using the results obtained by the designs. We evaluated the performance of light focus in the designed otoscope with the otoscopes we built. The experimental equipment was built with the constructed otoscope and the headlight. We demonstrated experimental methods for measuring illuminance at the narrow mouth in the otoscope using the built experimental equipment. In the experiments conducted using the experimental methods, the performance of light focus in the designed otoscope was evaluated by the measured illuminance.

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