Description
Sapphire window is one of the basic optical components in optics, usually used as a protective window for electronic sensors or external environment detectors. It is used to separate the environment on both sides, such as separating the inside and outside of the instrument, so that the inside and outside of the instrument are isolated from each other, so as to protect the internal devices. The sapphire circular window does not change the magnification of the system.
Optical Sapphire Glass Window
Specifications
| Substrate Material: | Sapphire |
|---|---|
| Antireflection Coating: | Coated |
| Diameter: | 6 mm |
| Surface Quality: | 60-40 scratch-dig |
| Surface Flatness: | lambda/4 |
| Thickness: | 0.12 mm |
| Diameter Tolerance: | +0/-0.1mm |
| Thickness Tolerance: | ±0.1mm |
| Parallelism: | <3 arcmin |
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Features
- High Optical Transmittance: Sapphire windows offer excellent transparency across a wide spectral range from ultraviolet (150nm) to infrared (5000nm).
- Exceptional Hardness: Sapphire is the second hardest natural material after diamond, providing high scratch and wear resistance.
- Superior Thermal Stability: Withstanding temperatures over 2000°C, sapphire windows are ideal for extreme heat environments.
- Chemical Resistance: Highly resistant to acids, alkalis, and most chemicals, making them suitable for harsh conditions.
- High Mechanical Strength: Sapphire windows have excellent impact and pressure resistance, allowing use in high-stress environments.
- Low Thermal Expansion: Their minimal thermal expansion ensures optical stability under temperature fluctuations.
- High Refractive Index: With a refractive index of about 1.76, sapphire provides unique optical properties beneficial for specialized applications.
- Radiation Resistance: Resistant to radiation damage, making sapphire windows suitable for space and nuclear applications.
Applications
- High-Power Laser Systems: Sapphire windows serve as protective barriers in high-energy laser environments due to their heat and damage resistance.
- Industrial and Scientific Equipment: Used in spectrometers, optical sensors, and precision measurement instruments for their optical stability.
- Medical and Biomedical Devices: Applied in laser surgery windows, endoscopes, and diagnostic equipment due to their biocompatibility and durability.
- Harsh Environmental Optics: Suitable for underwater, high-pressure, and vacuum environments in deep-sea exploration and space missions.
- Infrared and UV Applications: Sapphire's broad spectral transmission makes it ideal for infrared cameras, thermal imaging, and UV detection systems.
- Optical Communication: Used in fiber-optic and laser communication systems for high-performance signal transmission.
- Watch and Consumer Electronics: Sapphire windows provide scratch-resistant, durable covers for high-end watches, smartphones, and camera lenses.
Frequently Asked Questions
What are the key advantages of sapphire windows?
Sapphire windows offer high hardness, excellent optical transparency from UV to IR, superior scratch resistance, and exceptional chemical and thermal stability.
What wavelength range can sapphire windows transmit?
Sapphire windows have a broad transmission range from approximately 150nm (UV) to 5500nm (mid-IR), making them suitable for various optical applications.
How can sapphire windows be customized for specific applications?
Sapphire windows can be customized in size, thickness, coatings (such as anti-reflective or conductive coatings), and shapes to meet specific optical and environmental requirements
Are sapphire windows suitable for infrared applications?
Yes, sapphire has good IR transmission up to approximately 5.5μm, making it useful in thermal imaging and IR sensor applications.
Can sapphire windows withstand high temperatures?
Yes, sapphire windows have excellent thermal resistance and can withstand temperatures exceeding 2000°C, making them ideal for extreme environments.
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