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Resolving Power Chart

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  • Test for Astigmatism
  • USAF Test Pattern in Black, Red, Yellow, and Blue
  • 6 Elements in 6 Groups

USAF pattern is printed in black, red, yellow, and blue to test for chromatic aberration and at 90° for testing astigmatism.

Technical Information

Number of Line Pairs / mm in USAF Resolving Power Test Target 1951
Element
Group No.
-2 -1 0 1 2 3
1 0.250 0.500 1.00 2.00 4.00 8.00
2 0.280 0.561 1.12 2.24 4.49 8.98
3 0.315 0.630 1.26 2.52 5.04 10.10
4 0.353 0.707 1.41 2.83 5.66 11.30
5 0.397 0.793 1.59 3.17 6.35 12.70
6 0.445 0.891 1.78 3.56 7.13 14.30