click me!

Sapphire Prisms

  • Large wavelength range: 0.15~5μm
  • Extreme hardness for harsh environment
  • Chemical and erosion resistant front surface
Inquire Us  

Specifications:

Types Right angle prisms, 60° equiliateral dispersing prism,
customized prisms
Materials Optical grade single crystal sapphire
Aperture >90% Dimension Tolerance +0.0/-0.2mm
Thickness Tolerance +/-0.2mm Surface Quality 40/20 S/D
Flatness 1Lambda@633nm

 

Physiccal and Optical Properties:

Transmission Range 0.17 to 5.5 μm Refractive Index No 1.75449; Ne 1.74663 @ 1.06 μm
Reflection Loss 14% at 1.06 μm Absorption Coefficient 0.3 x 10-3  cm-1  @ 2.4 μm
Reststrahlen Peak 13.5 μm dn/dT 13.1 x 10-6  @ 0.546 μm
dn/dμ = 0 1.5 μm Density 3.97 g/cc
Melting Point 2040°C Thermal Conductivity 27.21 W m-1 K-1 @300K
Thermal Expansion 5.6 (para) & 5.0 (perp) x 10-6 /K * Hardness Knoop 2000 with 2000g indenter
Specific Heat Capacity 763 J Kg-1 K-1 @ 293K Dielectric Constant 11.5 (para) 9.4 (perp) @ 1MHz
Youngs Modulus (E) 335 GPa Shear Modulus (G) 148.1 GPa
Bulk Modulus (K) 240 GPa Elastic Coefficients C11=496 C12=164 C13=115 C33=498
C44=148
Apparent Elastic Limit 300 MPa (45,000 psi) Poisson Ratio 0.25
Solubility 98 x 10-6  g/100g water Molecular Weight 101.96
Class/Structure Trigonal (hex), R3c

Single crystal sapphire prisms are ideal for demanding applications (such as laser systems) and harsh environments because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamond and, because of their structural strength, sapphire crystal lenses can be made much thinner than other common materials. Sapphire has a good transmission at 0.15 to 5.5μm, which covers ultra-violet (UV) to midwave infrared (MWIR) wavelength range.

Hangzhou Shalom EO offers customized lenses upon customer's request.