Siemens star

名词 n.

英文释义

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

词形变化

Siemens stars plural

词源

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