| 摘要 |
<p>A measuring device is for c.r.t. reproduction errors, is esp. for colour tubes since it is designed for conveyance error measurements in tubes having two fluorescent substances of different colours combined in one substance, each excited by its own electron beam. A frame near the screen has two rectangular or U-shaped plates. Each passes light emitted from a corresp. first or second coloured flourescent material group of the tube. An adjuster connected to one plate enables alignment of the images of a test pattern formed on the screen by both plates. The degree of adjustment corresp. to the convergence error magnitude. The adjuster can rotate one rectangular plate about an axis parallel to the width of the other plate or one U-shaped plate about an axis parallel to the width of an arm of the other.</p> |
