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USAF 1951 Glass Slide Resolution Targets

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  • Negative and Positive Patterns On Glass
  • Two Sizes Available
  • Each is Boxed and Includes Resolution Value Chart
  • High Resolution Target Available (down to 645 lp/mm)

USAF 1951 Glass Slide Resolution Test Targets are available in either positive (chrome pattern on clear background) or negative (clear pattern on a chrome background). The positive pattern is recommended for the quality control of microscopes and magnifiers. The negative pattern is ideal for collimators and other illuminated test equipment. USAF 1951 Glass Slide Resolution Test Targets are boxed and include a resolution value chart. The targets conform to MIL-S-150A.

Technical Information

Number of Line Pairs / mm in USAF Resolving Power Test Target 1951
Element
Group Number
 For High Res only
-2 -1 0 1 2 3 4 5 6 7 8 9
1 0.250 0.500 1.00 2.00 4.00 8.00 16.00 32.0 64.0 128.0 256.0 512.0
2 0.280 0.561 1.12 2.24 4.49 8.98 17.95 36.0 71.8 144.0 287.0 575.0
3 0.315 0.630 1.26 2.52 5.04 10.10 20.16 40.3 80.6 161.0 323.0 645.0
4 0.353 0.707 1.41 2.83 5.66 11.30 22.62 45.3 90.5 181.0 362.0 —
5 0.397 0.793 1.59 3.17 6.35 12.70 25.39 50.8 102.0 203.0 406.0 —
6 0.445 0.891 1.78 3.56 7.13 14.30 28.50 57.0 114.0 228.0 456.0 —

Condition Positive Test Target Negative Test Target
Lighting Condition Front-lit or general lighting Back-lit or highly illuminated
Appearance of Bars Dark bars on a bright background Bright bars on a dark background
Application General optical testing High-contrast or back-lit testing
Substrate Clear substrate with chrome patterns Chrome-covered substrate with clear patterns
Example Use Case Microscope calibration Projection systems, back-lit displays