Study on visibility of light color filter glasses using narrow band absorption of visible light in tunnel illumination

2017 Fiscal Year Final Research Report

• Project/Area Number: 26350670
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Tohoku Bunka Gakuen University
• Principal Investigator: SAKAMOTO Yasuo 東北文化学園大学, 健康社会システム研究科, 教授 (60410304)
• Co-Investigator(Kenkyū-buntansha): 中山 奈々美 東北文化学園大学, 医療福祉学部, 講師 (00616641)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 健康・福祉工学 / 遮光眼鏡 / トンネル照明 / コントラスト感度 / グレア / 羞明 / ナトリウムランプ

Outline of Final Research Achievements

We have developed a light color filter glasses with effective anti - glare for middle and elderly people, but the yellow light absorption of this filter was concerned about deterioration of visibility in the tunnel. In this study, the change of the contrast sensitivity in the sodium lamp lighting environment (yellow light) was examined.
In the case of a tunnel simulating a two-lane expressway on each side, there was no reduction in visibility. However, face-to-face traffic occurs in a one-lane tunnel. Visibility was reduced due to mixture of sodium lighting and glare of white LED headlight. It is necessary to use the clip-on or over-glass type for security reasons until tunnel lighting is turned into LEDs or two lanes on each side are completed.
In the future aging, we are studying the narrow band absorption filter of visible light aiming at improvement of quality of vision.

Free Research Field

眼光学