Determination of Daylight Transmittance/Reflectance Using LabSolutions™ UV-Vis: JIS R 3106 Testing Method for Transmittance/Reflectance of Flat Glass

Introduction

Various optional analysis functions can be added to LabSolutions UV-Vis software for control of Shimadzu ultraviolet and visible light (UV-VIS) spectrophotometers. This article introduces a daylight transmittance/reflectance measurement function, which is one of those options. Among standards related to determination of daylight transmittance and reflection, the Japanese Industrial Standard JIS R 3106 provides a “Testing method on transmittance, reflectance and emissivity of flat glasses and calculation of total solar energy transmittance.” As indexes showing the properties of plate glass, JIS R 3106 specifies measurement methods and calculation methods for visible light transmittance and reflectance, daylight transmittance and reflectance, the solar heat gain coefficient (total solar energy transmittance), and normal emittance. Here, the light transmittance/reflectance and daylight transmittance /reflectance of two different samples of flat glass were calculated.

December 18, 2019 GMT