Abbe Number (v_d):

65.41

Bevel:

Protective as needed

Clear Aperture (%):

≥90

Clear Aperture CA (mm):

11.25

Diameter (mm):

12.50 ±0.5

Thickness (mm):

1.75 ±0.2

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_abs ≤2.5% @ 550nm

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

3.25 (+20 to +300°C)

Density (g/cm³):

2.23

Edges:

Ground

Index of Refraction n_d:

1.472

Knoop Hardness (kg/mm²):

480

Operating Temperature (°C):

1 hour @ 500; >100 hours @ 450

Poisson's Ratio:

0.2

Resistance to Temperature Difference (K):

Short Term, 1 hr: 110K
1 - 100 hrs: 90K
Long Term, >100 hrs: 80K

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

BOROFLOAT^®

Surface Flatness (P-V):

4 - 6λ

Surface Quality:

80-50

Thermal Shock (K):

Up to 4mm Thick: 175K
4 - 6mm Thick: 160K
6 - 15mm Thick: 150K

Transformation Temperature (°C):

525

Transmission (%):

≥95

Type:

Protective Window

Typical Energy Density Limit:

10 J/cm² @ 532nm, 10ns

Wavelength Range (nm):

400 - 700

Young's Modulus (GPa):

10 J/cm² @ 532nm, 10ns

Regulatory Compliance

RoHS 2015:

Compliant

Reach 224:

Compliant

Certificate of Conformance:

View

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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Title	Type	Stock Number	Price	Buy
12.5/12.7mm Optic Dia., SM05 Thin Mount, M4	Fixed	#13-789	€18,00 Qty 5+ €17,20 Request Quote	3-4 days ×
12.5/12.7mm Optic Dia., SM05 Thin Mount, 8-32	Fixed	#13-790	€18,00 Qty 5+ €17,20 Request Quote	3-4 days ×
12.5/12.7mm Optic Dia., L-Slot Direct Mount	Fixed	#36-416	€52,00 Request Quote	3-4 days ×
12.5/12.7mm Optic Dia., Side Flange Direct Mount	Fixed	#36-418	€52,00 Request Quote	3-4 days ×
12.5/12.7mm Optic Dia., L-Slot and Rotation Direct Mount	Adjustable - Rotary	#36-417	€86,00 Request Quote	3-4 days ×
5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-529	€93,00 Qty 10+ €83,70 Request Quote	Contact Us ×
7.0 - 40.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-676	€95,00 Qty 10+ €85,50 Request Quote	In Stock ×
10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-530	€101,00 Qty 10+ €90,90 Request Quote	3-4 days ×
7.0 - 67.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-669	€103,00 Qty 10+ €92,70 Request Quote	3-4 days ×
8.0 - 118.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-666	€107,00 Qty 10+ €96,30 Request Quote	3-4 days ×
4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-077	€141,00 Qty 5+ €124,10 Request Quote	3-4 days ×
2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts	Fixed	#17-530	€143,70 Request Quote	Contact Us ×
12.5/12.7mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-955	€239,00 Qty 5+ €227,10 Request Quote	In Stock ×
5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-078	€367,00 Qty 5+ €323,70 Request Quote	3-4 days ×
12.5/12.7mm Optic Dia., Precision Gimbal Mount	Adjustable - Gimbal	#84-640	€385,00 Qty 5+ €346,50 Request Quote	In Stock ×
12.5/12.7mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-958	€393,00 Qty 5+ €373,40 Request Quote	3-4 days ×

12.5mm Diameter x 1.75mm Thickness, MgF2 Coated, BOROFLOAT® Window

Regulatory Compliance

Product Family Description

12.5mm Diameter x 1.75mm Thickness, MgF₂ Coated, BOROFLOAT® Window