50 x 50 x 3.3mm Thickness, MgF₂ Coated, BOROFLOAT® Window

Abbe Number (v_d):

65.41

Bevel:

Protective as needed

Clear Aperture (%):

≥90

Clear Aperture CA (mm):

45.00 x 45.00

Dimensions (mm):

50.00 x 50.00

Thickness (mm):

3.30 ±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:

Seamed

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:

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):

Length (mm):

50.00

Width (mm):

50.00

Regulatory Compliance

RoHS 2015:

Compliant

Reach 223:

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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Title	Type	Stock Number	Price	Buy
40mm Sq., Fixed Filter Holder	Fixed	#54-997	£66.42 Qty 10+ £60.02 Request Quote	In Stock ×
50/50.8mm Sq. Kinematic Mount, 2 Screws	Adjustable - Tip-Tilt	#58-858	£84.46 Qty 5+ £76.01 Request Quote	3-4 days ×
Filter Kinematic Mount, 2-Screw	Adjustable - Tip-Tilt	#58-874	£85.28 Qty 5+ £76.75 Request Quote	In Stock ×
60mm sq - Rectangular Bar Clamp	Fixed	#54-995	£89.38 Qty 10+ £80.44 Request Quote	In Stock ×
Filter Kinematic Mount, 3-Screw	Adjustable - Tip-Tilt	#58-875	£92.66 Qty 5+ £83.39 Request Quote	In Stock ×
50/50.8mm Sq. Kinematic Mount, 3 Screws	Adjustable - Tip-Tilt	#58-861	£93.48 Qty 5+ £84.13 Request Quote	In Stock ×

50 x 50 x 3.3mm Thickness, MgF2 Coated, BOROFLOAT® Window

Regulatory Compliance

Product Family Description

50 x 50 x 3.3mm Thickness, MgF₂ Coated, BOROFLOAT® Window