Standard No.:	GB/T 25758.4-2010
English Name:	Non-destructive testing - Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing - Part 4: Edge method
Chinese Name:	无损检测 工业X射线系统焦点特性 第4部分：边缘方法
Chinese Classification:	J04    Basic standards and general methods
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ; SAC
Issued on:	2010-12-23
Implemented on:	2011-10-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	160.0
Delivery:	via email in 1~3 business day

GB/T25758的本部分规定了采用清晰边缘的射线照相底片,来校验管电压最高至500kV 的工业X 射线系统的大于0.5mm 焦点尺寸的方法。
X 射线图像的像质和分辨力很大程度上取决于焦点的特性。焦点成像质量基于目标平面的二维强度分布。
边缘方法对于在现场条件下校验焦点是特别有效,以发现焦点的变化。本方法不能用于焦点尺寸的绝对测量。焦点尺寸的绝对测量方法见附录A。