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 |
