| Subject | English | German |
| opt. | long-wave pass filter | Filter mit langwelligem Durchlaßbereich |
| opt. | long-wave pass filter | Filter mit kurzwelliger Grenzwellenlänge (the filter transmits the longer wavelengths and rejects the shorter wavelengths) |
| opt. | sharp long-wave pass filter | Kantenfilter (e.g. transmitting above 420 nm) |