When using X-ray inspection system, we often adjust the tube voltage and tube current to make the imaging clearer. Increasing tube voltage can penetrate products with higher density and thickness; increasing tube current can make the image brighter. So, what is the principle of this phenomenon? Tube voltage: Increasing tube voltage produces photon with higher frequencies and shorter wavelengths, that is, the energy of photons is higher, which allows [...]

Grayscale refers to the gradation level with different brightness from the darkest to the brightest. The more intermediate levels there are, the more delicate the picture effect can be. We all know that the X-ray images are not color, but black and white. But this does not affect us to find defects, because we can still distinguish the outline of the object based on the depth of black and [...]

In the previous article, we talked about the principle of a closed microfocus X-ray tube for X-ray inspection equipment. Correspondingly, there is an open microfocus X-ray tube. They are distinguished according to how the vacuum inside the X-ray tube is generated. The closed X-ray tube is always kept in a vacuum state, and the open X-ray tube has a device to open the X-ray tube, which is not sealed [...]

In the last issue, we talked about how the image of the electronic X-ray inspection machine can be zooming in and zooming out. However, how much did it zoomed in and zoomed out, that is, how is the magnification calculated? Let's figure out the definitions of several terms at first: magnification of electronic X-ray inspection machine From the figure above, we can see that the actual diameter [...]

First, the microfocus X-ray tube of WELLMAN X-ray inspection equipment is closed. The microfocus X-ray tubes below 160KV are usually closed. Accelerating the electrons and hitting a metal target is the easiest way to generate X-rays. After the electron hits the target, 99% of its lost kinetic energy is converted into thermal energy, which causes the target to generate heat; the remaining 1% of the kinetic energy emits photons, [...]

First of all, let's understand the focal spot size. This parameter comes from the X-ray source. It affects the definition of the final imaging together with the flat panel detector. It is also an important parameter for the PCB X-ray inspection system. X-rays are generated inside the X-ray source. The filament that acts as the cathode emits an electron beam and bombards the anode target. 99% of the kinetic [...]