Ray tracing from scene to oi; includes distortion, relative illum and PSF oi = opticsRayTrace(scene,oi) Use ray trace information, say generated by Code V or Zemax lens design programs, to compute the optical image irradiance. See the routines rtGeometry and rtApplyPSF for the algorithms applied. This routine, which resides in ISET-Algorithms, is normally selected as the Custom Computation in ISET-Optics. The optics information is incorporated by using Optics | Import. It is essential to have PSF data that are centered on the sampling grid (see rtPSFCenter). Copyright ImagEval Consultants, LLC, 2003.