| Subject | English | German |
| math. | phase function | Phasenfunktion |
| el. | phase perturbation function | Phasenstörungsfunktion |
| opt. | phase response function | Phasenübertragungsfunktion (graph showing the variation of image position with spatial frequency) |
| opt. | phase transfer function | Phasenübertragungsfunktion (graph showing the variation of image position with spatial frequency) |