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| Subject | English | German |
| footb. | long pass | langer Pass |
| 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) |