Fused Quartz Vitrosil 077 Optical Materials

FUSED QUARTZ VITREOSIL® 077

Vitreosil® 077 optical fused quartz is manufactured by flame fusion of naturally occurring high-purity quartz crystal. Vitreosil® 077 has a useful transmission range from <260 nm in the near UV through to >2 000 nm in the infrared.

* The optical properties of re-drawn rod and tube are not as shown in the table below

Vitreosil® 077 high-purity fused quartz has a useful transmission range from <260 nm in the UV to >2 000 nm in the infrared

Optical Properties Typical Chemical Analysis

Vitreosil® Grade	077
Bubbles
Bubble class (DIN 58927)	0.1
Sum of CSA (mm² / 100 cm²)	< 0.01

Maximum Bubble diameter (mm)	0.5
Maximum number of inclusions (0.1-0.2mm per 100cm³	2
(Bubbles and inclusions <01.mm are not counted)

Striae (MIL-G-174A) in functional direction (i.e. direction of view) (The direction of view shouild be specified at time of enquiry / order)	B

Granularity	Faint

Residual strain (nm/cm)	<5

Fluroescence (254nm excitation)	Blue / Violet

Radiation resistance
UV	Slight darkening after prolonged exposure.
X-Ray & Gamma Ray	Darkens after 10⁷ RAD

Thermal Data

Strain Point‡	1085°C
Annealing Point‡	1195°C
Softening Point‡	1730°C
Thermal Expansion
Coefficient (Average)	0.54 x 10^-6
‡ Note that these values may vary, depending on thermal history of the glass.

Transmission

Typical external transmission of Vitreosil® 077 fused quartz (including Fresnel reflection losses for 10 mm pathlength)

WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.