| 摘要 |
PURPOSE:To eliminate the exchange of a chart, to improve production efficiency and to improve the safety of video adjusting work by providing a gray scale chart part and a resolution chart part at one test chart. CONSTITUTION:A test chart 21 is constituted on a glass board 22 as a base by providing gray scale parts 23A and 23B, resolution chart parts 24A and 24B and a reference light transmission part 25. The resolution chart parts 24 are arranged while being overlapped on a peak light transmissivity part 26. Thus, the video adjustment is enabled without exchanging the test chart and the production efficiency is improved by shortening adjusting work time just for that component. On the other hand, since it is not necessary to exchange the test chart, a production line is prevented from being stopped by any accident such as the drop of the test chart. Further, when the resolution chart parts 24 are arranged on the peak light transmissivity part 26 of the gray scale chart parts 23A and 23B, the adjustment using the gray scale chart parts 23A and 23B is not affected. |
