With the help of the USAF resolution test chart, also called "USAF 1951 Resolving Power Test Target", the resolving power of the machine vision system (camera + lens) could easily be determined.
Although there are today even more precise methods for determining the limiting resolution, the USAF is extremely easy to use and therefore quite common.
Although there are today even more precise methods for determining the limiting resolution, the USAF is extremely easy to use and therefore quite common.
The grouping of the three bars that can not be clearly optically separated from one another shows the limiting resolution of the system. Each group consists of six elements, group 9 only of three elements.
Resolution = 2Group*+(Element-1)/6 (Line pairs/mm)
Determing line pais/mm with the help of the USAF target
Note: For a simple calculation please select a value from the drop-down box!We respect your privacy: we do not store any input, results or recipients. Send yourself your calculation with your own email program (MailTo-Link).
A line pair (lp) consists of a single black line and a white line.
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