Customizable Optical Sapphire watch crystal Lens

The sapphire watch crystal  is a common type of crystal  and it is often used in high-end watches. It is wellknown for its extremely high hardness and scratch-resistant properties.

In this article, we will discuss the advantages, performance, types and maintenance methods of sapphire watch crystals.

What is the crystal of a sapphire watch crystal?

The sapphire watch crystal is a watch compomtent that protects the surface of the watch. It is made of synthetic sapphire.

This material is highly recognized for its outstanding hardness and excellent scratch resistance. And its hardness enables it to effectively resist scratches from everyday items such as keys, coins, and even sand.

It is a good choice for luxurious and professional timepieces.

Apart from being used in high-end watches, sapphire crystal is also employed in some smart phones, camera lenses and other precision instruments where optical clarity and durability are of critical importance.

Overall, the sapphire watch crystal is regarded as a symbol of quality and durability.

Parameter of sapphire glass:

Key Characteristics of Sapphire watch crystal

• Outstanding Optical Transmission

It offers excellent light transmission, ranging from 150 nm to 7500 nm. This includes ultraviolet (UV), visible, near-infrared (NIR), and mid-infrared (MIR) regions.

Therefore, it is ideal for various optical applications.

• Exceptional Thermal Stability

  
  With a very low expansion coefficient of just 5 × 10⁻⁶ /°C and a high melting point of 2050°C, sapphire performs reliably under extreme temperatures — up to 1900°C — and resists thermal shock exceptionally well.

• Superior Mechanical Strength

  
  Sapphire ranks 9 on the Mohs hardness scale. Therefore, it offers outstanding resistance to scratching. It also has excellent compressive and flexural strength, ensuring durability under mechanical stress.

• Excellent Vacuum Seal Integrity

  
  It can provide excellent sealability, maintaining vacuum systems effectively. Even when exposed to sudden temperature changes or thermal shock, it retains structural integrity and prevents leakage.

 

Types of Sapphire crystal

• Natural Sapphire crystal
• Flame Fusion Sapphire crystal
• Czochralski Sapphire crystal

 

How to maintain the sapphire watch crystal

Sapphire is good for watches, especially in luxury watches. Sapphire’s strength, scratch resistance, durability and transparency make it the first choice for high-end watches.

During cleaning, a soft non-fibrous cloth (such as a lens cloth) can be used to wipe the surface of the spectacle lens. Avoid using alcohol-based, chemical solvents or abrasive agents as they may damage the anti-reflective coating on the surface.

In addition, it is necessary to regularly check the sealing condition between the watch crystal and the case.

 

If you are looking for sapphire watch crystals, please choose Chengyu. We offer you high-quality sapphire watch crystals and other optical components.