JB∕T 6839-2011 放映银幕分类.pdf

ICS37.060.10

N42.•I~.q·二

备案号：34939-2012

十

『川人d飞二＞＇\

L.~鱼，L＂＂＂＇＂＂咀

际自后程需泣，

中华人民共和国机械行业标准

JB/T6839-2011

代替JB/T683萨一2002

放映银幕分类

Theclassificationofprojectionscreens

2012-04幽01实施

2011-12-20发布

JB/T6839-2011

目次

前言··································…..·················……..………II

1范罔……·叫….....………………........……·………....….........1

2术语和定义··········….........………………·….....……………..1

3分类....……·······…·······…··…………..……...………·………··············3

3.1分类原则．．．

3.2D~~－漫反射银幕………….......············………..….....………、...3

3.3S却一一反射角上增益反射银幕...........……··……….....………………..3

3.4B捏一→入射角上增益反射银幕.....…－…······…...........4

3.5R型一~：远射银幕…………········………………......….......……················………..…..…4

4银幕分类特性一览表.......................….......…….….4

5银幕尺寸系列．．．

图1；版坐标画法示意图....·········……....……....………··…·-…………··········..2

图2直角坐标画法示意图．．．．．．．．…………··…...........…..….....2

图3D型银幕一一亮度系数特性曲线（极坐标〉．．

图4S型银幕一一亮度系数