DA013

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USAF 1951 Resolution Wheel Pattern 38.1mm Diameter POS Ideal for determining "flat field" resolution across field of view. Diameter is 38.1mm with a USAF 1951 Resolving Power Targe t reproduced 9 (nine) times. Each image includes Group 2, Element 1 (4lp/mm) through Group 7, Element 6 (228lp/mm). Opaque pattern on a clear field.(Positive) Patterned on stable glass etched in reflective chrome, on top surface. (Right reading looking through.) Click here to download drawing Show more