Siemens star

Have you ever seen a star in the sky? It has many arms extending outwards, right? Now imagine that star made of circles of different sizes, each overlapping the other. That's called a Siemens Star.

A Siemens Star is an image composed of circles of different sizes, equally spaced and with their centers arranged as the arms of a star. This star has several circular areas that have lines or patterns on them. These patterns are used to check how well a camera or an imaging device can capture that pattern.

The patterns and lines on the Siemens Star are designed in such a way that it tests the sharpness, contrast, and resolution of the device. Camera manufacturers use this pattern to test the quality of their cameras in various settings.

For instance, when you take a photo with your camera or smartphone, you may notice some blurry areas or certain parts of the image are not clear. By using a Siemens star, professionals can test the camera's clarity at the center and edges of the image, as well as how well it captures subtle details.

So, in summary, a Siemens Star is like a star made of circles and lines that are used to test the quality of a camera or imaging device. It helps professionals ensure that the images produced are sharp, clear, and of high resolution.