TY - GEN AU - Fricke-Begemann,T AU - Ihlemann,J TI - Hybrid micro-optical elements by laser-based fabrication of Fresnel lenses on the end face of gradient index lenses SN - 1094-4087 PY - 2018///0906 N1 - Publication Type: Journal Article UR - https://doi.org/10.1364/OE.26.023751 ER -