Solid glass Fresnel cone
A solid glass Fresnel cone, which uses total internal reflection of incident polarised light to easily generate white light OAM and radially polarised vector vortex beams. Glass Fresnel cone illuminated by rainbow coloured light source. Image taken in collaboration with QuantIC imaging hub, based at the University of Glasgow, UK. [Honorable mention 2019 After Image photo contest.]
—Kevin J Mitchell, University of Glasgow
