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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

BOROFLOAT® Borosilicate Windows

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TECHSPEC BOROFLOAT Borosilicate Windows

TECHSPEC BOROFLOAT Borosilicate Windows

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  • Low Coefficient of Thermal Expansion
  • Visible to Near Infrared Transmission
  • High Resistance to Thermal Shock

TECHSPEC® BOROFLOAT® Borosilicate Windows are ideal for high temperature and harsh environment applications. The windows have a low coefficient of thermal expansion of 3.25 (+20 to +300°C). TECHSPEC® BOROFLOAT® Borosilicate Windows feature visible to near infrared transmission. Unlike common borosilicate that is drawn flat, BOROFLOAT® is produced by a float technique that yields superior surface flatness — typically 4 - 6λ per inch. BOROFLOAT® is about three times more resistant to thermal shock than standard soda lime glass.

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Common Specifications

Bevel:
Protective as needed
Clear Aperture (%):
≥90
Knoop Hardness (kg/mm2):
480
Poisson's Ratio:
0.2
Young's Modulus (GPa):
64
Abbe Number (vd):
65.41
Index of Refraction (nd):
1.472
Substrate:
Surface Flatness (P-V):
4 - 6λ
Surface Quality:
80-50
Coefficient of Thermal Expansion CTE (10-6/°C):
3.25 (+20 to +300°C)
Density (g/cm3):
2.23
Transformation Temperature (°C):
525

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Technical Information

 
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