摘要 |
PROBLEM TO BE SOLVED: To provide an exposure device for forming the fluorescent surface of a color picture tube for suppressing the occurrence of the unevenness of colors by partially forming light quantity compensating filter layers at a light quantity compensating filter common to respective colors and at individual compensating lenses for respective colors, as the uneveness of clolors is generared due to the problem of position precision of the combination of the compensating filter and the compensating lenses. SOLUTION: A light quantity compensating filter 19 of which the input and output ends common to respective colors are made flat is disposed between an optical lens system 18 and a shadow mask 68, and light quantity compensating filter layers 14 are partially formed at individual compensating lenses 15 for respective colors for red, green and blue, respectively. COPYRIGHT: (C)2005,JPO&NCIPI
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