Extraction of critical temperature on optical transparency of Fused Silica with practical test above of 1200 °C

The effect of temperature on transparency of optical window is one of the important points in designing of Electro-Optical systems. In this paper by studying the optical features of Fused Silica and practical testing up to 1200 °C, the ability of using this material in this temperature range was studied. Results of this test show that Fused Silica in 1200 °C can’t sustain its optical features. By repeating the test in lower temperature, the critical temperature of optical transparency of Fused Silica obtained 1100 °C.