Our custom produced silicon blanks are used as substrates for the production of IR lenses and windows operating in the 2 to 5 micron (MWIR) range. Silicon blanks come in round, rectangular and other complex, generated geometries. We welcome requests for any quantity from prototype orders to thousands of pieces.
Physical properties of Silicon
| Melting Point | 1414°C |
| Density | 2.329 g/cm3 |
| Thermal Expansion Coefficient | 2.6 x 10-6/K |
| Youngs Modulus | <111> 187 GPa |
Material Specifications:
| Diameter | Up to 152 mm (6”) |
| Grade | Optical |
| Purity | >99.999% |
| Transmission from 2.5 to 5 μm (optical grade) | >52% |
| Orientation Monocrystalline | <100> & <111>, polycrystalline |
| Resistivity (standard Optical grade) | > 20 Ohm.cm (P-type) > 10 Ohm.cm (N-type) |
| Type (dopant) | P – type (Boron) N – type (Phosphorus) |
| Refractive index (4 μm at 25 ℃) | 3.4289 and doesn’t vary more than 20 ppm over the entire blank |
Transmission:
Blank Specifications & Tolerances
| Diameter | Up to 152 mm (6”) |
| Thickness | 0.5 mm to 500 mm |
| Rectangles & Squares | up to 152 mm (6”) long |
| Diameter | – 0.03 mm |
| Thickness | ± 0.02 mm |
| Flatness | ≤10 μm |
| Parallelism | ≤ 20 μm |
| Perpendicularity | ≤ 20 μm |
| Chamfer | 0.1 to 1 mm |
| ETV | ≤ 20 μm |
| Roundness | ≤ 20 μm |
For additional information please visit http://cimcoop.com/inproducts/3/products/1/
ITAR NOTE:
Information provided to our partner Cimcoop is in accordance with and under the authority of 22 CFR 125.4 (b)(2). It is authorized under Technical Assistance Agreement TA 4955-11, as amended by the U.S. Government for export only to Bulgaria for use by Naked Optics Corp (herein NOC) and Cimcoop Holding Ltd. (herein Cimcoop). It is not transferred to any unapproved party or otherwise be disposed of in any other country, either in their original form or after being incorporated into other end items without the prior written approval of the U.S. Department of State.
Information provided to our partner Cimcoop is in accordance with and under the authority of 22 CFR 125.4 (b)(2). It is authorized under Technical Assistance Agreement TA 4955-11, as amended by the U.S. Government for export only to Bulgaria for use by Naked Optics Corp (herein NOC) and Cimcoop Holding Ltd. (herein Cimcoop). It is not transferred to any unapproved party or otherwise be disposed of in any other country, either in their original form or after being incorporated into other end items without the prior written approval of the U.S. Department of State.