IdealPhotonics' vortex waveplate/retarder, a phase-type optical element, introduces orbital angular momentum (OAM) into the optical field through a spatially varying birefringent structure, converting linearly polarized/circularly polarized light into a vortex beam carrying a helical phase wavefront.By coupling the polarization state with orbital angular momentum (OAM) through a spatially modulated birefringent structure, a vortex beam carrying a helical phase is precisely generated in the optical field, enabling on-demand control and conversion of the photon angular momentum state.