Title :
Fabrication of binary Fresnel lenses in PMMA by femtosecond laser micromachining
Author :
Vázquez, R. Martínez ; Eaton, S.M. ; Ramponi, R. ; Cerullo, G. ; Osellame, R.
Author_Institution :
Dipt. di Fis., Politec. di Milano, Milan, Italy
Abstract :
Binary Fresnel lenses are fabricated by ablation of PMMA substrates with a femtosecond laser. The minimum feature size in our experimental conditions is 600 nm. Lenses with good transparency and focal lengths in the range from 500μm to 5mm are obtained, with a maximum efficiency close to the theoretical one.
Keywords :
laser beam machining; laser materials processing; lenses; micro-optics; micromachining; optical fabrication; optical polymers; transparency; PMMA substrates; binary Fresnel lenses; femtosecond laser micromachining; optical fabrication; optical transparency; Fabrication; Fresnel reflection; Laser ablation; Laser theory; Lenses; Optical surface waves; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
