BK7 Windows available as high and low precision lens

₪ BK7 Standard and High Precision Grade Windows

High Precision BK7 Windows

Specifications

Material: BK7 grade A optical glass
Diameter Tolerance: +0.0, -0.1mm
Thickness Tolerance: ± 0.2mm
Clear Aperture: >80%
Parallelism: see the table
Surface Quality: 20-10 scratch and dig
Wavefront Distortion: l/10 per 25mm
Protective Bevel

Dia.(mm)	T(mm)	1± Parallelism			10" Parallelism
Dia.(mm)	T(mm)	Part No.	Price	Order	Part No.	Price	Order
10.0	6.0	WNH0201	£11.20	order	WNH0211	£12.70	order
12.7	6.0	WNH0202	£11.20	order	WNH0212	£12.70	order
25.0	6.0	WNH0203	£13.70	order	WNH0213	£15.50	order
25.4	6.35	WNH0204	£13.70	order	WNH0214	£15.50	order
30.0	6.0	WNH0205	£14.10	order	WNH0215	£17.70	order
50.0	10.0	WNH0306	£42.00	order	WNH0316	£63.30	order

Standard Grade BK7 Windows

Specifications

Material: BK7 grade A optical glass
Diameter Tolerance: +0.0, -0.1mm
Thickness Tolerance: ± 0.2mm
Clear Aperture: >80%
Parallelism: 1'
Surface Quality: 60-40 scratch and dig
Wavefront Distortion: l per 25mm
Protective Bevel

Part No	Dia. (mm)	T (mm)	Price	Order
WNL0101	10.0	3.0	£4.20	order
WNL0102	12.7	3.0	£4.20	order
WNL0107	15.0	1.0	£4.20	order
WNL0108	15.0	3.0	£4.20	order
WNL0103	25.0	3.0	£4.70	order
WNL0104	25.4	3.0	£4.70	order
WNL0105	30.0	3.0	£4.90	order
WNL0106	50.0	3.0	£6.30	order
WNL0109	50.8	6.35	£7.70	order

Prices exclude VAT and Carriage - POA for larger quantities of our BK7 windows

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