|
Inverse Square Law
|
Exposure - Distance
|
Reciprocity Law
|
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
|
|
|
|
Geometric
Magnification
|
Geometric Unsharpness
|
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
|
|
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
|
|
|
|
|
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
|
|
Partial support for this work was provided by the NSF-ATE (Advanced Technological Education) program through grant #DUE 0101709.
Opinions expressed are those of the authors and not necessarily those of the National Science Foundation.
