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R71 USAF Positive Test Chart
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Home >> Analysis & Defect Review >> Graticules >> Optical Resolution Charts >> USAF Test Charts
R71 USAF Positive Test Chart

R71 USAF Positive Test Chart

State: In stock
USAF Test Chart. positive image. Group -2 to Group 7, element 6.
Warranty: No warranty infomation


Price: Contact us




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  • Delivery time: 8h00 - 18h00 daily
  • Genuine product, provided width CO, CQ
  • 03 months of free warranty for consumable and accessories
  • 12 months of free warranty for main equipment
  • Accessorie's price is applied only when purchased with
    main equipment
  • Contact us for any particular accessory's quotion
Email: info@redstarvietnam.com Every day in week

Large Positive Image ~ group -2 to 7

B270 glass, size 75mm x 75mm

 

Pattern Description Order code
R71 USAF Test Chart Groups -2 to 7 06B01097
  • Large Positive Image ~ group -2 to 7
  • B270 glass, size 75mm x 75mm

 

Pattern Description Order code
R71 USAF Test Chart Groups -2 to 7 06B01097

 

  • USAF resolution charts are recognised the world over as a universal standard for testing the vertical and horizontal resolution of imaging systems.
  • Each element on the chart comprises three vertical bars and three horizontal bars, and the detail on these slides is as fine as 0.78 microns (644  line-pairs per mm). The resolution of the imaging system is normally specified as the Group and  Element of the finest bars that can be clearly defined.
  • There are six versions manufactured by Pyser, see images below tables.
  • The following tables show the USAF data as either line-pairs-per-mm or the actual line/bar sizes in mm:-

 

USAF Resolution Chart, Number of Lines per mm
Element Number Group Number
  -2 -1 0 1 2 3 4 5 6 7 8 9
1 0.25 0.5 1 2 4 8 16 32 64 128 256 512
2 0.28 0.561 1.12 2.24 4.49 8.89 17.95 36 71.8 144 288 576
3 0.315 0.63 1.26 2.52 5.04 10.1 20.16 40.3 80.6 161 322 644
4 0.353 0.707 1.41 2.83 5.66 11.3 22.62 45.3 90.5 181 362  
5 0.397 0.793 1.59 3.17 6.35 12.7 25.39 50.8 102 203 406  
6 0.445 0.891 1.78 3.56 7.13 14.3 28.51 57 114 228 456  

 

 

 

USAF Resolution Chart, Width of Bars in mm
Element Number Group Number
  -2 -1 0 1 2 3 4 5 6 7 8 9
1 2 1 0.5 0.25 0.125 0.063 0.031 0.016 0.0078 0.0039 0.002 0.00098
2 1.79 0.89 0.446 0.223 0.111 0.056 0.028 0.014 0.007 0.0035 0.0017 0.00087
3 1.59 0.79 0.396 0.198 0.099 0.05 0.025 0.012 0.0062 0.0031 0.0016 0.00078
4 1.42 0.71 0.355 0.177 0.088 0.044 0.022 0.011 0.0055 0.0028 0.0014  
5 1.26 0.63 0.315 0.158 0.079 0.039 0.02 0.0098 0.0049 0.0025 0.0012  
6 1.12 0.56 0.281 0.14 0.07 0.035 0.018 0.0088 0.0044 0.0022 0.0011  

Resolution Charts

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