N-Bk7 Uncoated Optical Windows Small Windows Optical Glass

• After-sales Service: After-Sale Service
• Warranty: 12
• Usage: Lighting, Optical
• Type: Windows
• Transmittance: >95%
• Shape: Plano
• Model NO.: FW-BK7
• Material: Optical Glass
• Lenses Color: Clear
• Customized: Customized
• Coating: UV
• Diameter: 76.2mm
• Surface Quality: 60-40/40-20
• Coat: Ar
• Clear Aperture: >90% of Diameter: >90% of Diameter
• Transport Package: Electrolytic Capacitor Paper, Foam, Carton
• Specification: costomized
• Trademark: FineWin
• Origin: China

Product Description

Diameter	1mm to 400mm
Diameter Tol.	+/-0.1
Material	Bk7 sapphire fused silica,ZnS2,CaF2,Si,Ge.
Surface Quality	40-20 standard
Flatness	1/4 lambda
Chamfer	0.25mmx45degree
Coating	AR,HR,Silver,Aluminum.Golden.

Product Parameters

Material	N-bk7,H-K9L,Fused Silica,N-SF10,Silicon,CaF2,Sapphire etc.
Length	2~300mm	Centration	<3 arc min
Height	2~300mm	Clear Aperture	>90%
Radius	>1.5mm	Flatness (per 25mm at 632.8nm)	<1.5Lambda(General) <1/4Lambda(High Precision)
Center Thickness	>0.5mm	Irregularity of Fringes	0.2-0.5 Lambda
Focal Length	3~3000mm	Surface Quality(S/D)	60/40,40/20 or better
Size Tolerance(mm)	+/-0.1mm,+/-0.05mm	Chamfer	<0.25mmx45 degree
Center Thichness Tolerance(mm)	+/-0.1mm,+/-0.05mm	Coating	Uncoated,AR,BBAR,Reflective
Focal length Tolerance(mm)	±1%	Design Wavelength	632.8nm