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| OEM | "Original Equipment Manufacturer". Manufacturer of products being sold under a different company name. |
| Optical axis | Responsible for the sharpness of a projection image. Only if the projection head is positioned vertically above the lamp house and the concave mirror the user is able to get a sharp projection image. It is important that there is a stable connection between projection head and projection arm. |
| OSD | "On Screen Display" The menue is inserted into the projected image. |
