A filter in which the pass band is a wavelength range higher than the wavelength range that is blocked. Long pass filters pass all wavelengths longer than the cut off wavelength. Long pass filters include cold mirrors, colored glass filters, and thermo set ADC (optical cast plastic) filters.
Specifications
Material: | Optical glass, fused silica |
Diameter: | +0/-0.2mm |
Thickness: | +/-0.1mm |
Clear aperture: | > 80% of diameter |
Surface quality: | 60-40 scratch and dig |
Transmitted wavefront, P-V | λ/4 @632.8nm |
Coating type: | Long pass filter |
Surface 1: | multi-layer dielectric coating |
Surface 2: | MgF2 |
Transmission: | >85% |
Cut-on tolerance: | 2% |
Cut-on Slope: | 3% |
Blocking: | Optical density, OD > 2 |
A filter in which the pass band is a wavelength range higher than the wavelength range that is blocked. Long pass filters pass all wavelengths longer than the cut off wavelength. Long pass filters include cold mirrors, colored glass filters, and thermo set ADC (optical cast plastic) filters.
Specifications
Material: | Optical glass, fused silica |
Diameter: | +0/-0.2mm |
Thickness: | +/-0.1mm |
Clear aperture: | > 80% of diameter |
Surface quality: | 60-40 scratch and dig |
Transmitted wavefront, P-V | λ/4 @632.8nm |
Coating type: | Long pass filter |
Surface 1: | multi-layer dielectric coating |
Surface 2: | MgF2 |
Transmission: | >85% |
Cut-on tolerance: | 2% |
Cut-on Slope: | 3% |
Blocking: | Optical density, OD > 2 |
