Ellipsoidal reflector design of the LED vehicle projector type headlamp
Ellipsoidal reflector spotlight - Wikipedia
Figure 1 from Physics of elliptical reflectors at large reflection and divergence angles II: Analysis of optical beam distortions in integrated ultra-large-angle elliptical curved reflectors | Semantic Scholar
Optics - How are reflectors used in LED luminaire design? How do they affect LED COB performance? – Luminus Devices