## ComputeDiffLimit

##### >Psychtoolbox>PsychOptics

s0 = ComputeDiffLimit(pupil,nm)

Compute the diffraction limit for coherent light.

(For incoherent light the answer is 2*s0.)

See page 120 in Goodman.

```
"pupil" diameter in mm
"nm" is wavelength in nm
"s0" is highest spatial frequency passed by the pupil in cycles/deg
```

Goodman, J. W. (1968) Introduction to Fourier Optics.

San Francisco: McGraw-Hill. Page 120.

Goodmanâ€™s formula involves di, which I think is the distance to the

image. Goodmanâ€™s formula gives the limit in

cycles/unit length. The formula below gives

the answer in cycles/degree.

Path Retrieve current version from GitHub | View changelog

`Psychtoolbox/PsychOptics/ComputeDiffLimit.m`