| 摘要 |
An improved shadow mask for a color television image tube is shown to comprise a thin metal sheet having a translucent area defined by a multiplicity of dot-like apertures extending through the sheet, the sheet being formed of a composite metal laminate having at least one layer of steel providing the shadow mask with desired strength and having at least one layer of another metal such as copper of relatively greater thermal conductivity for conducting heat rapidly away from parts of the translucent mask area which become locally overheated during image tube operation, thereby to avoid local deformations of the translucent mask area such as would cause distortion or blurring of the image produced by the tube. |
