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BK7 Window - Quality Grade - Diameters (Uncoated & BBAR Coated)

Our precision Glass Windows are optically polished with parallel faces, making them useful not only as windows, but as substrates for special beamsplitters etc. They are ideal for applications which require minimal transmitted beam deviation and can be produced either uncoated or with AR coating for ranges covering both visible and NIR (450-900nm). The windows listed below are quality grade, circular BK7 windows of various diameters.

Specifications:

Material:	BK7
Diameter:	+0, -0.15mm
Length, width:	±0.1mm
Thickness:	±0.1mm
Flatness:	λ/4 over 90% of aperture dimensions
Surface Quality:	<40-20 scratch/dig
Parallelism:	<30 arcsec
Coating:	AR Coated 450-900nm

Part No.	Coating	Diameter (mm)	Thickness (mm)	Material	Price (Ex.VAT)	Buy Now	Get Quote
WQK1000	Uncoated	10	3	BK7	£11.00	QTY:	Quote Me
WQK1000-AV2	AR Coated	10	3	BK7	£20.50	QTY:	Quote Me
WQK1500	Uncoated	15	3	BK7	£9.95	QTY:	Quote Me
WQK1500-AV2	AR Coated	15	3	BK7	£21.50	QTY:	Quote Me
WQK2500	Uncoated	25	6	BK7	£12.95	QTY:	Quote Me
WQK2500-AV2	AR Coated	25	4	BK7	£23.75	QTY:	Quote Me
WQK2501	Uncoated	25.4	6.35	BK7	£11.85	QTY:	Quote Me
WQK4000-C	Uncoated (with CofC)	40	6	BK7	£28.50	QTY:	Quote Me
WQK4000	Uncoated	40	6	BK7	£18.00	QTY:	Quote Me
WQK4000-AV2	AR Coated	40	6	BK7	£31.75	QTY:	Quote Me
WQK5000	Uncoated	50	6	BK7	£24.60	QTY:	Quote Me
WQK5000-AV2	AR Coated	50	6	BK7	£38.90	QTY:	Quote Me
WQK6500	Uncoated	65	8	BK7	£38.85	QTY:	Quote Me