| 摘要 |
1515244 Projection apparatus SONY CORP 10 March 1976 [12 March 1975] 09569/76 Heading G2J Apparatus for projecting a colour image from cathode ray tubes includes cathode ray tubes 1G, 1R, 1B each producing a different primary colour image (e.g. green, red and blue respectively), tubes 1G, 1B being arranged at right-angles; and lens 2G in front of tube 1G; a dichroic mirror 4B in front of tubes 1R, 1B for combining their images; and a second lens ZRB in front of mirror RB, the tubes 1G, 1R, 1B, mirror 4B and lenses 2G, ZRB being arranged so that the axes of the beams projected by the lenses converge on a screen 3. The cathode ray tubes 1G, 1R are arranged so that they are affected in the same direction by terrestial magnetism. |
