TECHSPEC® 1/4λ N-BK7 Precision Windows

These N-BK7 optical windows have a parallelism of 1 arc minute. VIS 0° coating provides less than 0.4% reflectance per surface from 425 to 675nm. Windows can be supplied with a customer specified AR coating, however a minimum order quantity will apply.

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Description Stock No. Price In Stock  
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1/4-Wave N-BK7 Window 30mm Dia. Uncoated
NT45-579 $35.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 30.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
1/4-Wave N-BK7 Window 30mm Dia. VIS 0 Coating
NT47-521 $48.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 30.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 30mm Dia. VIS-NIR Coating
NT48-445 $48.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 30.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 30mm Dia. MgF2 Coating
NT45-580 $41.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 30.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 35mm Sq. Uncoated
NT49-470 $43.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 35.00 x 35.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 3.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 35mm Sq. VIS 0 Coating
NT49-630 $56.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 35.00 x 35.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 3.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 35mm Sq. VIS-NIR Coating
NT49-634 $56.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 35.00 x 35.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 3.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 35mm Sq. MgF2 Coating
NT49-626 $49.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 35.00 x 35.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 3.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 40mm Dia. Uncoated
NT45-581 $42.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 40.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
1/4-Wave N-BK7 Window 40mm Dia. VIS 0 Coating
NT47-522 $57.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 40.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 40mm Dia. VIS-NIR Coating
NT48-446 $57.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 40.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 40mm Dia. MgF2 Coating
NT45-582 $52.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 40.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
1/4-Wave N-BK7 Window 50mm Dia. Uncoated
NT45-583 $50.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
1/4-Wave N-BK7 Window 50mm Sq. Uncoated
NT47-944 $60.50Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Dimensions (mm) 50.00 x 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
1/4-Wave N-BK7 Window 50mm Dia. VIS 0 Coating
NT47-523 $65.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 50mm Sq. VIS 0 Coating
NT47-946 $75.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 50.00 x 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 50mm Sq. VIS-NIR Coating
NT47-947 $75.50Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Dimensions (mm) 50.00 x 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 50mm Dia. VIS-NIR Coating
NT48-447 $65.50Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 50mm Sq. MgF2 Coating
NT47-945 $70.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Dimensions (mm) 50.00 x 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Exempt
1/4-Wave N-BK7 Window 50mm Dia. MgF2 Coating
NT45-584 $60.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 50.00
Dimensional Tolerance (mm) ±0.25
Clear Aperture (%) 85
Thickness (mm) 4.00
Thickness Tolerance (mm) ±0.20
Surface Accuracy (λ) 1/4
Surface Quality 60-40
Parallelism (arcminutes) 1
Substrate N-BK7
RoHS Compliant
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