Optical Properties TestSpectral Characteristics

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Applicable Standard

  • KS L 2514 Testing method on transmittance, reflectance for daylight and solar radiation and solar heat gain coefficient of flat glass
  • JIS R 3106 Testing method on transmittance, reflectance and emittance of flat glasses and evaluation of solar heat gain coefficient
  • ISO 9050 Determination of light transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors
  • EN 410 Determination of luminous and solar characteristics of glazing
  • ASTM E424 Solar Energy Transmittance and Reflectance of Sheet Materials
  • ISO 13837 Method for the determination of solar transmittance
  • ASTM D 1003 Haze and Luminous Transmittance of Transparent Plastics
  • ASTM E 903 Solar Absorption, Reflectance and Transmittance of Materials Using Intergrating Spheres

Equipment and Tools

Test Items
  • Transmittance, %
  • Reflectance, %
  • Absorptance, %
  • Solar Transmittance %
  • Solar Reflectance, %
  • Solar Absorptance, %
  • Ultraviolet Transmittance, %
  • Ultraviolet Reflectance, %
  • Ultraviolet Absorptance, %
  • Visible Transmittance, %
  • Visible Reflectance, %
  • Visible Absorptance, %
  • Emissivity
  • U value W/㎡ K
  • Thermal Resistance, ㎡ K/W
  • Relative Heat Gain W/㎡ C
  • Shading Coefficient
  • Solar Heat Gain Coefficient
  • Solar Heat Excluding Coefficient
  • Total Rejected Solar Energy
  • Total Solar Energy Transmittance, Solar factor

How to Measure

The ratio of velocity of penetrating or reflecting light against velocity of incoming light to an object is measured using a spectrophotometer. While UV-VIS-NIR Spectrophotometer measures spectrum distribution in the range of 185nm~3,300nm, FT-IR Spectrophotometer measures spectrum distribution in the range of 4000cm-1~200cm-1(2500nm~50,000nm).

Sample Size

Larger than 5cm(W) x 5cm(L)

Applicable field

Information about spectral and thermal characteristics of glass for construction, industrial use and vehicles