Device and method of imaging or measuring of a radiation source

Abstract

A simplified method and a device to determine the size and/or the location of focus of an X-ray tube. By means of a slit camera a longish image of the extension of the focal spot is achieved in one direction, the image of which normally is recorded photographically and can be analyzed by a microdensitometer. This is a time-consuming and circumstantial procedure, which normally requires many exposures. According to the invention a slit image is utilized in the same manner as in the slit-camera but instead of a photographic film for the recording one uses a line sensor with its sensor elements being arranged parallel to the slit and at least cover the width of the slit image in question. With this arrangement a pronounced electric signal from a single exposure is obtained due to that each line sensor element detects the signal from sections across the slit along the whole length of the sensor.

Dependencies are inferred from the claim text.