 |
Sunny Precision Optics Inc. |
|
| Home | Company | Products | Contact | Quote | Order |
| |
Sunny Precision Optics Inc. |
|
| Home | Company | Products | Contact | Quote | Order |
Sunny Precision Optics can provide raw calcite crystal and are extracted from the deposit to meet U.S. Military specifications MIL-G-174B. change, we can provide colorless calcite using our unique techniques in color , which has 15~20% transmission improvement from yellow calcite at short wavelength. We may supply raw calcite size. Calcite is a natural crystal that has high birefringence and wide spectral transmission and available on a variety of size from 10mm to 80mm rhombs. It is a negative uniaxial crystals and commonly used as UV, visible and near IR polarizers. We can provide quality Raw calcite, semi-finished product and Polarizer product.
Spectral Properties, Wavefront Distortion (Striae), Scatter are main reasons to affect calcite's quality.
Physical and optical properties
| Transparency Range | 300-2300nm |
| Crystal Structure | Rhombihedral |
| Density | 2.7g/cm3 |
| Crystal Class | Negative uniaxial with no=na=nb, ne=nc |
| hardness | 3 Mohs |
| Refractive index, birefringence(¦¤=ne-no) |
no =1.6557, ne=1.4852 ¦¤n=-0.1705, ¦Ñ= 6.20¡ã@ 630nm
|
| no =1.6629, ne =1.4885 ¦¤n=-0.1705, ¦Ñ= 6.20¡ã@ 1300nm | |
| Sellmeier equation | no2=2.69705+0.0192064/(¦Ë2-0.01820)-0.0151624¦Ë2 ne2=2.18438+0.0087309/(¦Ë2-0.01018)-0.0024411¦Ë2 |
Standard Semi_finished Calcite Dimension
| <20x20x20 mm |
| >20x20x20 mm |
| >30x30x30 mm |
| >40x40x40 mm |
| >50x50x50 mm |
| >60x60x50 mm |
Specification (finished product)
| Dimension | Max: 60 x 60 x 50mm |
| Surface Quality | 40/20 Scratch and dig |
| Flatness | ¦Ë/4 @ 632.8 nm |
| Transmission wavefront distortion | ¦Ë/2 @632.8 nm |
| Coating | Upon request |
