10.2 Solarization

The degree of solarization is indicated as a decrease in transmittance caused by radiation from a super high pressure mercury-vapor lamp. The datailed measurement method is described in the "Japanese Optical Glass Industrial Standard (JOGIS)".

10.3 Optical Homogeneity

Optical Homogeneity (n) is guaranteed by use of our He-Ne laser interferometers. The n specification is indicated for three diameter ranges (Ø 160 mm or less, Ø 210 mm or less, Ø 260 mm or less) due to the n variances caused by glass type, size, and shape. Please note, if the ordered thickness is less than 25 mm, we will use a 25 mm thick test piece for n measurement. Please contact us when lower n specifications are required.