Longpass Filters for Raman Spectroscopy
Longpass filters for Raman spectroscopy are designed to transmit longer-wavelength Raman-scattered signals while blocking the stronger Rayleigh-scattered excitation laser light.
| Laser Wavelength | Recommended Cut on | Blocking Range | Optical Density |
| 325 nm | ≥340 nm | <330 nm | OD6 |
| 355 nm | 370-380 nm | <350-360 nm | OD6 |
| 473/488/514 nm | ≥500 nm | <480 nm | OD6 |
| 532 nm | 545-560 nm | <520 nm | OD6 |
| 785 nm | ≥800 nm | <780 nm | OD6 |
| 1064 nm | ≥1100 nm | <1050 nm | OD6 |