AN ADAPTATOR LENS FOR A PROJECTION SCREEN APPLIANCE SUCH AS A TELEVISION SET, A DATA DISPLAY SCREEN OR THE LIKE

摘要

The device has an enlargement lens or plate; for example, a Fresnel lens. In order to improve the recognition of detail on the projection screen and keep glare and radiation away from the viewer, the invention proposes that a filter plate (1) be inserted in front of the enlargement lens (7). The dependent claims concern the construction of the filter plate.