Abstract: A method and a device for affixing a film (7) of a predetermined length to a surface (5) are described. The film (7) is wound on a roller (3) having a circumference which is larger than or equal to the length of the film (7). Then the roller (3) is rotated relative to the surface (5), whereby the film (7) is transferred from the roller (3) to the surface (5).

Abstract: A method and a device for affixing a film (7) of a predetermined length to a surface (5) are described. The film (7) is wound on a roller (3) having a circumference which is larger than or equal to the length of the film (7). Then the roller (3) is rotated relative to the surface (5), whereby the film (7) is transferred from the roller (3) to the surface (5).

Abstract: The bulls-eye effect produced in the projected image by projection television cathode ray display tubes with convexly curved faceplates and multi-layer interference filters is compensated by using darkened or tinted glass. Since the faceplate glass is thicker in the center, more attenuation of the light output occurs there than at the edges of the display window where the glass is thinner, resulting in improved luminance uniformity of the display.

Abstract: Method of vapor-depositing an interference filter layer on the inside of a display window, a display window, a projection cathode ray tube and a projection television apparatus.A method of manufacturing a projection cathode ray tube comprising an interference filter on an inwardly directed surface of a display window, the method comprising as a process step the vapor deposition of at least one layer of the interference filter. It has been found that the edges of a display window during the vapor deposition of an interference filter layer detrimentally influence the thickness of the vapor deposited layer, the thickness increases more towards the edges than follows from geometrical computations. In the method according to the invention vapor deposition is performed on a display window for which the height of the edge is less than 1/5 of the minor axis. The display screen preferably comprises a recessive edge.

Abstract: The bulls-eye effect produced by projection television cathode ray display tubes with convexly curved faceplates and multi-layer interference filters is compensated by increasing the optical absorption of one of the filter layers having a decreasing center-to-edge thickness gradient. Since the layer is thicker in the center, more attenuation of the light output occurs there than at the edges of the display window, resulting in improved luminance uniformity of the display.

Abstract: Projection-television display tube includes a band pass or Fabry-Perot interference filter between the display window and the luminescent screen, resulting in the elimination of undesirable luminescent emissions both above and below the wavelength region of interest. A three-tube color projection display device includes such a filter in at least the green emitting display tube.