Optical Sappire Prism Overview

Sapphire prisms are optical prisms fabricated from optical-grade sapphire substrates. Coligh Optics is a manufacturer of sapphire prisms, producing optical prisms made from single-crystal sapphire, including various common prism types such as:

• Right-angle prisms
• Beam splitter prisms
• Wedge prisms
• Dove prisms, etc.

We offer processing and customization according to customer requirements and drawings.

The Charateristic Of Optical Sappire Prism

Sapphire prisms are widely adopted in many high-end optical systems due to the following characteristics:

• With a Mohs hardness of 9, sapphire prisms are second only to diamond and surpass materials like fused silica and calcium fluoride.
• Their transmission bandwidth is exceptionally broad, spanning from ultraviolet to mid-infrared, making them particularly suitable for applications requiring wide-band operation.
• Sapphire prisms maintain stable performance at high temperatures, exhibiting high thermal conductivity and low thermal expansion coefficient, ensuring consistent optical properties under temperature variations.
• They possess stable chemical and environmental resistance, demonstrating strong corrosion resistance against acidic and alkaline solvents.
• Sapphire possesses a high refractive index, approximately 1.76 at 589 nm, enabling the design of larger refraction angles. It exhibits slight birefringence, which can be controlled via the optical axis orientation in polarization applications.

The Type Of Optical Sapphire Prisms We Can process

Currently we can process a lot different type of sapphire prisms.

such as :

• Sapphire Right-Angle Prism
• Sapphire Isosceles Triangular Prism
• Sapphire Wedge Prism
• Sapphire Dove Prism
• Sapphire Amici Prism, Ridge Prism
• Sapphire Spectroscope Prism
• Sapphire Polarizing Prism, etc.

 

Our Capability Of Customizing Sapphire Prism

We can customize various precision sapphire prisms based on customer drawings or requirements. We offer the following customization services:

• Multiple sapphire prism types and structures
• Size range: Minimum diameter 3mm, maximum diameter 300mm.
• Surface figure: 1/2λ
• Irregularity: 1/4λ
• Surface quality: 40/20 (per MIL-PREF-13830B)
• Parallelism: 30”
• Wedge: 30”
• Thin film Coatings: Anti-reflection coating, reflective coating

Application Of Sapphire Prism

• Laser Beam Steering
  In high-power laser systems, sapphire excels due to its inherent properties: high-temperature resistance, a high laser damage threshold, and resistance to laser ablation. Sapphire prisms, serving as beam deflection or angle correction elements, can adjust the laser’s incident and exit angles within the optical path, providing exceptionally stable laser deflection.
• Spectrometers
  Sapphire exhibits excellent transmittance across the ultraviolet to infrared spectrum and possesses a high refractive index. In spectrometers, it serves as a dispersive prism or waveplate prism to decompose incident light into distinct wavelengths. It is also utilized for polarization analysis and interferometry.
• Aerospace
  Due to sapphire’s inherent properties—impact resistance, radiation resistance, and minimal thermal sensitivity—sapphire prisms serve as refractive and deflective components in satellite systems. They withstand mechanical vibrations and extend system lifespan.