| 摘要 |
PURPOSE:To obtain an easily adjustable exposing device adaptable to various sizes of Braun tube, by using a system where two column lens having curvature of semi- circular cross-section are crossed perpendicularly each other as a correction lens. CONSTITUTION:A shadow mask 25 is mounted on a panel 27 where a fluorescent member 26 containing a photo-sensitive agent is coated on the inner face then it is mounted on a mounting base 24. An elongated light source 21 for exposing is located at the position facing against the panel 27. Correction lens 22, 231 and 232 are located between the light source 21 and the panel 27. Each correction lens 231, 232 has approximately semi-circular cross-section where each axis is arranged to be coaxial or perpendicular against the axis of the elongated light source. Each curvature of the correction lenzes 231, 232 will pass the light while approximating to the loci of horizontal and vertical deflection beams of color image receiving tube. |
