| Subject | English | German |
| opt. | bundle of projecting rays | Projektionsstrahlenbündel |
| opt. | intersection of the projecting rays | Schnittpunkt der Projektionsstrahlen |
| phys. | projecting ray | Projektionsstrahl |
| opt. | reproduction of the bundle of projecting rays | Wiederherstellung des Abbildungsstrahlenbündels (which form the images during exposure) |
| opt. | reproduction of the bundle of projecting rays | Nachbildung des Abbildungsstrahlenbündels (which form the images during exposure) |