BK7 Windows

Model:	BK7 Windows
Brand:	dndphotonics
Origin:	Made In China
Category:	Electronics & Electricity / Electronic Instrument / Optical Lens & Instrument
Label:	MgF2 windows , Si Windows , Sapphire Windows
Price:	US $1 / pc
Min. Order:	1 pc

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Product Description

Made from BK7 material, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.

Specifications:

Material:	BK7 grade A optical glass
Dimension Tolerance:	+0.0, -0.1mm
Thickness Tolerance:	± 0.1mm
Surface quality:	60/40(Standard), 10/5(High Precision)
Clear Aperture:	>85%
Flatness:	λ(Standard), λ/10(High Precision) per 25mm@633nm
Parallelism:	1' (Standard), 10" (High Precision)
Bevel:	<0.25mm X 45°
Coating:	Upon requirement

Typical Sizes:

Round Shape Diameter(mm):	Φ5.0；Φ10.0 ；Φ12.7；Φ15.0；Φ20.0； Φ25.4；Φ30.0；Φ38.1；Φ50.8；Φ76.2
Square Shape: WxH(mm)	5.0x5.0 ；10.0x10.0 ；15.0x15.0 ； 20.0x20.0；25.0x25.0；50.0x50.0
Thickness Tolerance:	0.5；1.0；1.5；2.0；3.0； 4.0；5.0；6.0；8.0；10.0

How to order Windows?
Example:
Material:N-BK7
Diameter:Φ25.4+0.0/-0.1mm
Thickness:1.0±0.1mm
Surface quality: 60-40 S/D
Flatness: λ/2 per 25mm @633nm
Paralelism: <1 arc minute
Coating:Both side AR,R<0.25% @1064nm, AOI=0°