论文部分内容阅读
倾斜角度投照,必须依照几何投影原理和数学计算公式进行运算,求出管—床距、片移距和管移距,方能保证有良好的投照效果。本文介绍一种多用尺,该尺标有厘米,1/4圆周范围内的不同角度和倾斜角度投照的各种数据,既可用于倾斜角度投照,又可用径线和角度的测量,制作简单,应用方使,现介绍于下。 一、倾斜角度的几何投影原理和计算方法 1.求管—床距和预算管移距:图1中,AB为垂直中心线,C为倾斜后的焦点,B为胶片中心,O为受检物
Projection angle projection, must be in accordance with the principle of geometric projection and mathematical calculations to calculate the tube - bed distance, film and pipe distance away from the tube, in order to ensure a good projection results. This article presents a multi-purpose ruler with various data that is cast in different angles and angles of inclination in the centimeter and quarter-circle circumferences and can be used both for tilting projection and for measurement of diameter and angle Simple, application side, now introduced in the next. First, the tilt angle of the geometric projection principle and calculation method 1. Tube - bed distance and budget tube distance: Figure 1, AB vertical centerline, C for the tilt of the focus, B for the film center, O for the inspection Things