Spatial Frequency / MTF calculator
Convert lp/mm to cycles and diffraction MTF cutoff.
Category: Diffraction
Formula: νcutoff = 1/(λ·N)
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| lp/mm | lpmm | 100 | |
| λ | lam | nm | 550 |
| f-number | N | 5.6 |
Result with the default inputs
- Period: 10 µm
- Diff. cutoff: 324.6753 lp/mm
- Normalized ν: 0.308
Open it with your own values: put each input in the address as a parameter, for example /calculators/spatial-frequency-mtf?lpmm=100. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Optical transfer function