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do you know about Penumbra calculation as its calculated from this?
Ug=FxT/D
Ug=Geometric Unsharpness
F= Source or Window Size
T= Object Thickness
D= Distance from source to the front surface of the Test Object.
Your Diagnostic film length is calculated from this.
Depending on what standards you work to they will tell you how many shots to do on what thickness of material as well as distance shot from. there is a chart that can be referenced but i can't remember what its called. i will try & find out but i hope this helps
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∙ 11y ago
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