# Siemens star

> English word · Noun

## Definitions
1. A radial, sunburst-like test target used to measure the resolution and image quality of optical instruments, cameras, scanners, and printers.

## Etymology
Developed in the 1930s by Siemens & Halske AG to test the lenses of their narrow-film cameras.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/siemens-star