Walsh Glyn
Division of Vision Sciences, Glasgow Caledonian University, Glasgow, United Kingdom.
Optom Vis Sci. 2009 Dec;86(12):1376-9. doi: 10.1097/OPX.0b013e3181c0728d.
To investigate the effect of windscreen rake angle on effective transmittance and the contribution of spectacle lenses to the total transmittance of the system.
Theoretical analysis has been carried out using the Fresnel reflectance equations.
Windscreen rake can reduce effective transmittance significantly at angles present on modern aerodynamic vehicles. Spectacle lenses reduce the total transmittance still further, often to below the minimum level permissible in current international standards for windscreens.
Drivers should always be supplied antireflection-coated lenses where there is a chance of their spectacles being used for night-time driving, if current International standards for windscreen transmittance are to be met by the spectacle-windscreen combination. Windscreen rake angle should be accounted for both in the International Organization for Standardization transmittance standards and in roadside testing devices.
研究挡风玻璃倾斜角度对有效透过率的影响以及眼镜镜片对系统总透过率的贡献。
使用菲涅尔反射方程进行了理论分析。
在现代空气动力学车辆上存在的角度下，挡风玻璃倾斜会显著降低有效透过率。眼镜镜片会进一步降低总透过率，常常降至当前国际挡风玻璃标准允许的最低水平以下。
如果要使眼镜 - 挡风玻璃组合符合当前挡风玻璃透过率国际标准，那么在有可能用于夜间驾驶的情况下，应为驾驶员提供抗反射涂层镜片。国际标准化组织的透过率标准以及路边测试设备都应考虑挡风玻璃倾斜角度。
