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See all 44 Products in Family

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

125mm Diameter x 6.5mm Thickness, Uncoated, BOROFLOAT® Window

TECHSPEC BOROFLOAT Borosilicate Windows

Stock #45-685

$44.50

Qty 1-5
$44.50

Qty 6
$35.60

Volume Pricing
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eDrawing: eprt IGES PDF Drawing STEP: step

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Abbe Number (v_d):

65.41

Bevel:

Protective as needed

Clear Aperture (%):

≥90

Diameter (mm):

125.00 ±0.5

Thickness (mm):

6.50

Coating:

Uncoated

Coefficient of Thermal Expansion CTE (10^-6/°C):

3.25

Density (g/cm³):

2.2

Edges:

Ground Edges

Index of Refraction n_d:

1.472

Operating Temperature (°C):

1 hour @ 500; >100 hours @ 450

Poisson's Ratio:

0.2

Stress-Optical Coefficient (mm²/N):

4 x 10^-6

Substrate:

BOROFLOAT^®

Surface Flatness:

4 - 6λ

Surface Quality:

80-50

Thickness Tolerance (mm):

±0.2

Transformation Temperature (°C):

525

Transmission (%):

Type:

Protective Window

Wavelength Range (nm):

350 - 2000

Young's Modulus (GPa):

Regulatory Compliance

RoHS 2015:

Compliant

Reach 209:

Compliant

Product Family Description

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

BOROFLOAT® Borosilicate Windows are ideal for high temperature and harsh environment applications. 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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