Customized Square Sapphire Optical Window with Through Hole
Product overview
Our square sapphire optical windows with through holes are
precision-engineered from high-quality synthetic sapphire (Al₂O₃),
one of the hardest optical materials available. These windows
provide excellent mechanical strength, thermal stability, chemical
resistance, and wide spectral transmission from UV to NIR. Designed
for applications requiring both optical clarity and mechanical
durability, they protect sensitive components while allowing light
or laser transmission.
Featuring a through hole, these windows are ideal for mechanical
integration, alignment, vacuum feedthroughs, fluid or gas channels,
and other specialized applications.
Key Features
Material: High-purity synthetic sapphire (Al₂O₃)
Hardness: Knoop hardness ~1900 GPa, second only to diamond
Density: 3.97 g/cm³
Refractive Index (nd): 1.77
Young’s Modulus: 435 GPa
Thermal Stability: Excellent, suitable for high-temperature applications
Chemical Resistance: Resistant to acids, alkalis, and most corrosive chemicals
Optical Transmission: UV–Visible–NIR range
Surface Quality: 80/50, 60/40, 40/20 (scratch/dig)
Surface Flatness: Typical 2λ
Clear Aperture: ≥90%
Shape Options: Square, round, rectangular
Thickness Options: Customizable, e.g., 0.5 mm – 2 mm (or more)
Through Hole: Precisely drilled, customizable diameter and position
Customizable: Plane parallelism, flatness, orientation, and material purity
Applications
Laser and Optical Systems: High-durability windows for precise alignment and transmission
Medical Devices: Fluidic interfaces and sterile viewports
Aerospace & Defense: Sensors, optical access ports, and ruggedized equipment
Semiconductor & Vacuum Equipment: Vacuum-sealed windows with feedthrough holes
High-Temperature or Harsh Environments: Maintain optical performance under extreme conditions
Design Considerations
Hole Diameter & Position: Precisely engineered to prevent cracking
Chamfered Edges: Reduce stress around drilled holes
Surface Finish: Critical for both optical clarity and mechanical tolerance
Flatness & Parallelism: Can be customized for high-precision optical systems
FAQ
Q1: What materials are used in your sapphire windows?
A: We use high-purity synthetic sapphire (Al₂O₃), one of the
hardest and most chemically resistant optical materials, offering
excellent thermal stability and wide-spectrum optical transmission.
Q2: Can the windows be customized?
A: Yes. We offer customization for size, thickness, shape (square,
round, rectangular), hole diameter and location, surface flatness,
and crystal orientation according to your requirements.
Q3: How precise are the holes and surface quality?
A: Holes are precision-drilled with chamfered edges to minimize stress. Surface quality is high,
with scratch/dig options of 80/50, 60/40, or 40/20 and flatness
typically 2λ, ensuring optical clarity and durability.
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