Windows

N-BK7 Windows

N-BK7 Windows

Attribute Specification
Typical Diameter (Φmm) 10.0, 12.7, 15.0, 20.0, 25.4, 30.0, 38.1, 50.8
Typical Thickness (mm) 2.0, 3.0, 6.0, 6.35
Diameter Tolerance (mm) +0.0/-0.2 (General), +0.0/-0.02 (High Precision)
Thickness Tolerance (mm) ±0.2 (General), ±0.005 (High Precision)
Clear Aperture >80% (Small Size), >95% (Large Size)
Parallelism 3 min. (General), 3 sec. (High Precision)
Surface Quality 60/40 (General), 10/5 (High Precision)
Flatness (per 25mm@633nm) λ /2(General), λ/10 (High Precision)
Bevel (face width x 45) <0.25mm
Coating Uncoated, AR, HR, PR, Coating, etc.

Note for N-BK7 Window:
(1). Custom-made N-BK7 windows at any size from Φ2.0mm to Φ350mm clear aperture are available.
Besides round, N-Bk7windows at shape of quadrate, triangular, or other polygonal are available.
(2). Thickness from 1.0mm to 50.0 mm is available upon request.
(3). 100% clear aperture is available upon request.
(4). Better bevel is available upon request.
(5). N-BK7 Windows with Anti-Reflective(AR), High-Reflective(HR), Partial-Reflective(PR) coating are available.

Standard N-BK7 Window series:                                                                                    
Diameter Tolerance: ------------------ +0.0, -0.1mm
Thickness Tolerance: ----------------- ±0.2mm                       
Clear Aperture: ------------------------- >80%
Parallelism: -------------------------------- 1'(Standard), 10"(High Precision)
Surface Quality: ------------------------- 60/40(Standard), 10/5(High Precision)
Wavefront Distortion: ----------------- l (Standard), l /10(High Precision) per 25mm @633mm
Bevel: -------------------------------------- <0.25mm x 45°
Coating: -------------------------------- -- 1 /4 wave MgF2@550nm

Standard
F( mm)
T(mm)
Uncoated
Coated
Part No.
Part No.
10.0
3
WIN1101
WIN1111
12.7
3
WIN1102
WIN1112
15.0
3
WIN1103
WIN1113
25.4
3
WIN1104
WIN1114

High precision
F( mm)
T(mm)
Uncoated
Coated
Part No.
Part No.
10.0
6
WIN1201
WIN1211
12.7
6
WIN1202
WIN1212
15.0
6
WIN1203
WIN1213
25.4
6.35
WIN1204
WIN1214


 

 

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