Visible/Near IR Dichroic Filter
|
Dichroic Filter coatings are designed to transmit one spectral region (passband) and reflect another (rejection band). The filter is a Short Wave Pass if the passband is to the left of the transition slope, and a Long Wave Pass if the passband is to the right of the slope. The advantages of dichroic filters over colored glass filters are: 1) the rejection band is reflected rather than absorbed; 2) steeper transition slope between the passband and the rejection band; i.e. sharper cut-on or cut-off; 3) coatings can be custom designed for specific center wavelengths.
|
RMI Standard Specifications
|
| Angle of Incidence: |
0º or 45º |
| Passband: |
T = 50% + 5% at λ0
Tavg > 90% at 0º
Tavg > 85% at 45º |
| Rejection Band: |
Ravg > 99% at 0º
Ravg > 98% at 45º |
| Damage Threshold: |
10 J/cm2, 10 ns pulse |
|
Short Wave Pass Filter coating sample transmission curve with a cutoff at 650 nm. RMI will design a custom coating for your application. Please call (303) 664-5000 to discuss your coating requirements.
Long Wave Pass Filter coating sample transmission curve with a cutoff at 650 nm. RMI will design a custom coating for your application. Please call (303) 664-5000 to discuss your coating requirements. |
|
