论文部分内容阅读
(1)研究的背景 在保护带式(或称黑圈式)黑底屏工艺中,使用直接摄影法容易发生洞的桥联,因为黑底上的洞比葫罩上的映孔尺寸小。洞的桥联是由于两个相邻光点的重叠引起的。例如在屏上做蓝洞和绿洞时,先后通过同一映孔向屏上投射光点,这两个光点容易发生重叠。此外,为了保证在制成的显象管中,荧光屏边沿区的彩色纯度容许偏差高,在黑底上做洞的时候,洞的尺寸由屏中心向边沿逐渐缩小,因此要求光源要大,使边沿区的
(1) Background of the study In the protection band (or black circle) black screen process, the use of direct photography is prone to bridge bridging because the black hole is smaller than the screen size on the screen. The bridging of holes is caused by the overlap of two adjacent light spots. For example, when a blue hole and a green hole are formed on the screen, light spots are successively projected onto the screen through the same screen one after another, and the two light spots are prone to overlap. In addition, in order to ensure that in the tube made of the screen edge of the screen color purity tolerance to high, making holes in the black when the hole size from the center of the screen to the edge of the gradually reduced, so the light source to be larger, so that Edge of the area