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| Subject | English | German |
| astr. | half-wave plate | λ/2-Platte |
| opt. | half-wave plate | Halbwellenlängenplättchen (a plate which introduces a phase difference of π) |
| opt. | half-wave plate | λ/2-Wellenlängenplättchen (a plate which introduces a phase difference of π) |
| antenn. | half-wave plate in a waveguide | l/2-Platte in einem Hohlleiter |
| phys. | half-wave plate | Halbwellenlängenplättchen |
| el. | half-wave plate | Halbwelle-Platte |
| phys. | half-wave plate | Lambda-Halbe-Plättchen |
| phys. | half-wave plate | Halbwellenplättchen |
| opt. | half-wave plate | λ/2- Plättchen (a plate which introduces a phase difference of π) |
| opt. | half-wave plate | Halbwellenplättchen (a plate which introduces a phase difference of π) |
| astr. | half-wave plate | Halbwellenlängenplatte |
| tech. | half-wave retarder plates | Halbwellen-Verzögerungsplatten λ/2-Platten (optische Elemente, λ/2 plates) |