| Subject | English | German |
| opt. | diffracting aperture | Beugungsöffnung |
| opt. | diffracting aperture | Beugungsblende |
| opt. | edge of the diffracting diffraction aperture | Rand der Beugungsöffnung |
| opt. | edge of the diffracting diffraction aperture | Berandung der Beugungsöffnung |