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Sapphire Dome | High Purity Al₂O₃ Dome Lens

Sapphire Dome | High Purity Al₂O₃ Dome Lens

High-quality sapphire dome made from single crystal Al₂O₃. Offers excellent optical clarity, thermal stability, and mechanical strength. Ideal for LEDs, sensors, and laser systems.

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Product Overview

The sapphire dome is precision-crafted from single crystal aluminum oxide (Al₂O₃). It provides superior optical transparency and mechanical durability. Designed for high-power LEDs, optical sensors, laser devices, and photonics systems. The dome shape improves light extraction and beam shaping for LEDs and optical emitters.

Material Properties

Crystal Composition
High-purity Al₂O₃ (≥ 99.999%).
Low defects and impurities ensure consistent optical and mechanical performance.

Thermal Stability
Withstands high temperatures without deformation.
Supports LED and laser operation at elevated power levels.

Mechanical Strength
High hardness (Mohs 9) resists scratching and impact.
Durable during assembly and processing.

Chemical Resistance
Stable in acids, alkalis, and plasma environments.
Suitable for harsh manufacturing or operational conditions.

Optical Performance
Transparent from ultraviolet to infrared.
Minimizes light absorption and scattering for accurate optical performance.

Technical Specifications (Typical)

Parameter Value / Range Description
Material Al₂O₃ Single crystal sapphire
Shape Dome Hemispherical or custom curvature
Diameter 2 mm – 20 mm Standard sizes; customizable
Height 1 mm – 10 mm Dome height adjustable per design
Surface Finish Polished Optical-grade polish, Ra ≤ 0.3 nm
Crystal Orientation C-plane or optional For optical and mechanical consistency
Thermal Conductivity High Supports high-power applications
Hardness 9 Mohs Scratch-resistant and durable

Custom sizes, curvature, and polishing options are available based on application requirements.

Key Features

Enhanced Light Extraction
Dome geometry improves angular light distribution from LEDs.

Durable and Stable
Resistant to thermal, mechanical, and chemical stresses.

Optical Clarity
Minimizes absorption and scattering for precise light control.

High-Precision Fabrication
Uniform curvature and polished surface ensure repeatable optical performance.

Applications

  • LED Lighting: High-power and UV LEDs for efficient light extraction.

  • Optical Sensors: Photodiodes, phototransistors, and precision detectors.

  • Laser Systems: Protective domes and optical windows.

  • Photonics Devices: Light guides, beam shaping, and emission control.

  • Harsh Environments: Aerospace, automotive, or industrial sensor optics.

Customization Options

  • Diameter and height per design requirements.

  • Dome curvature optimized for LED or optical lens performance.

  • Surface polish (single side or double side) for precision optics.

  • Crystal orientation selection for mechanical and optical consistency.

  • Packaging and inspection for cleanroom handling.

Advantages of Sapphire Domes

  • Excellent thermal and mechanical durability.

  • Superior optical transparency in UV to IR spectrum.

  • High hardness protects against scratches and abrasion.

  • Customizable size, curvature, and surface finish for application-specific needs.

  • Reliable material for long-term LED, sensor, and optical performance.

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