Specifications:
| Shapes | 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 | 0.15 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 |
Optical Prisms are transparent optical elements with flat, polished surfaces that refract or reflect light. Optical prisms could be utilized for beam deviation and adjusting the orientation of an image.
Due to their incomparable surface hardness (Mohs hardness 9), high thermal conduction, endurance to scratch and abrasions, and resistance to common acids and alkalis, single crystal sapphire (Al2O3), prisms are the top performers in demanding contexts (such as lasers) and extreme condition and climates (e.g., vacuum, high heat, corrosive atmosphere). Because of the superb structural strength of sapphire, Sapphire Prisms can be fabricated into far more compact sizes than those made of other popular materials. Sapphire has good transmittance between 0.15 and 5.5 m, which covers the UV to MWIR wavelength range.
Shanghai North Optics offers customized prisms upon customers' request. The prism shapes include right angle prisms, 60°equilateral dispersing prisms, and other custom shapes (e.g., dove prisms, Penta prisms, roof prisms, rhomboid prisms.)
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