Inverse Square Law
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Exposure - Distance
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Reciprocity Law
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Where:
I1 |
= |
Intensity 1 at D1 |
I2 |
= |
Intensity 2 at D2 |
D1 |
= |
Distance 1 from source |
D2 |
= |
Distance 2 from source |
more information: Inverse Square Law Calculation
|
Where:
E1 |
= |
Exposure at D1 |
E2 |
= |
Exposure at D2 |
D1 |
= |
Distance 1 from source |
D2 |
= |
Distance 2 from source |
more information: Exposure-Distance Calculation
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Geometric Magnification
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Geometric Unsharpness
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 Note: This is an approximation and is only valid for the straight line portion of the film characteristic curve. See more info section. Where:
E1 |
= |
Exposure 1 |
E2 |
= |
Exposure 2 |
FD1 |
= |
Film Density at Exposure 1 |
FD2 |
= |
Film Density with Exposure 2 |
more information: Film Density - Exposure Calculation
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Where:
Ug |
= |
Geometric unsharpness |
f |
= |
Focal spot size |
a |
= |
Distance from source to object |
b |
= |
Distance from object to detector |
more information: Geometric Unsharpness Calculation
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 Where:
D |
= |
Defect depth from the film side of the part |
t |
= |
Thickness of material |
SD |
= |
Shift of defect image on the film |
SM |
= |
Shift of surface marker on the film |
more information: Indication Depth Calculation
|
Where:
Ix |
= |
transmitted intensity |
Io |
= |
Original intensity |
m |
= |
Linear attenuation coefficient |
x |
= |
Distance in material or material thickness |
more information: Attenuation Calculation
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