Used to calibrate instruments that measure refractive index of microscopic fragments of glass and glass-like materials, Glass Refractive Standards set consists of calibrated glass samples and immersion liquids calibrated for refractive index versus temperature. Materials, designed for compliance with standard test methodology in ASTM 1967, cover 1.4800–1.5400 refractive index range. Also, oils have thermal coefficient and delta of that coefficient that meets ASTM criteria for such tests.
This story is related to the following:Refractive Index Standards |