Meiying Optics is fresnel lens 

Visit at- https://www.alibaba.com/product-detail/Dia-300mm-Round-shape-PMMA-fresnel_62152195400.html?spm=a2747.manage.0.0.19c571d2N9tbKM
Meiying Optics is fresnel lens manufacturer,Different size round fresnel lens is usde for Decoration and exhibition for Wedding.
For more details pls contact with whatsapp 86-186-7672-7758 and email# li.huan@my-lens.cn