- check material=None is the same as preceding
- paraxial trace to be both axes
- alternate solution for intersect in spheroid (paraboloidal hyperhemispherical mirrors)
- finite/infinite focal/afocal object/image * implement afocal infinte last conjugate
- hyperhemispheric pupils
- fix extrinsic aberrations
- optimization +example (pickups, solves, asa, limits, variables)
- tolerancing +example (mc, inverse sensitivity)
- analyze mtf through focus plot
- analyze mtf at values vs image height
- speedup refract, intercept, propagate
- 3d plot