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Terms for subject Optics branch of physics containing angular aperture | all forms | in specified order only
| English | German |
| angular aperture | Öffnungswinkel (microscope: the angle of the largest cone of light entering the objective from an object point on the axis) |
| exit pupil angular aperture | Öffnungswinkel der Austrittspupille |
| half of the angular aperture | halber Öffnungswinkel |
| sine of half the angular aperture | Sinus des halben Öffnungswinkels |