Lens Aberration — PSF from Exact Ray Tracing

Paraxial → δ PSF · Exact Snell → spherical aberration → blur
400
400
1.52
50%
24
∞
0
Mode
Exact Snell's law Paraxial (sin α ≈ α)
Paraxial f: —
Blur radius: —
Image y: —
Exact: outer rays focus closer → spherical aberration → PSF spread grows with aperture.

Paraxial: all rays converge perfectly → δ PSF.