Optical Glass or N-BK7 is the main choice for use in the VIS (400-700nm) range. This is ideal for protecting more expensive optical components and display systems. With excellent chemical and stain resistance, high index of refraction and high transmission this makes the N-BK7 a robust contender at a low price.
Care must be taken as this material is temperature sensitive and not suitable for environments with extreme temperatures. A more robust, standard option in similar applications would be fused silica.
Firebird provides a number of stock options for Optical Glass but can provide customize and coated varieties suited to your exact specifications.
Optical Glass (N-BK7) Specs:
|Wavelength range: 340-2,500nm||Coating: Uncoated|
|Diameter tolerance: +/-0.1mm||Surface Quality: 60/40|
|Thickness tolerance: ±0.2mm||Paralellism: <3 arc minute|
|Clear Aperture: 90%||Density: 2.51g/cm3|
|Melting point: 557ºC||Young's Modulus: (GPa): 82|
|Coefficient of Thermal Expansion: 7.1x10/ºC||Knoop Hardness: 610kg/mm2|