Note for Silicon Window: 

(1). Custom-made Silicon windows at any size are available.
Besides round, shape of quadrate, triangular, or other polygonal are available. 
(2). Thickness from 1.0mm to20.0 mm is available upon request.
(3). Better bevel is available upon request.
(4). Si Windows with Anti-Reflective(AR), High-Reflective(HR), Partial-Reflective(PR) coating are available.

Note for Silicon Window: 

Attribute Specification
Typical Diameter (Φmm) 8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0
Typical Thickness (mm) 1.0 ~ 10.0
Diameter Tolerance (mm) +0.0/-0.2 (General), +0.0/-0.1 (High Precision)
Thickness Tolerance (mm) ±0.2 (General), ±0.05 (High Precision)
Clear Aperture >75% (Small Size), >90% (Large Size)
Parallelism 3 min. (General), 10 sec. (High Precision)
Surface Quality 80/50 (General), 40/20 (High Precision)
Flatness (per 25mm@633nm) λ(General), λ/4 (High Precision)
Bevel (face width x 45) <0.25mm
Coating Uncoated, AR, HR, PR, Coating, etc.


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