title: Design of optical element combining Fresnel lens with microlens array for uniform light-emitting diode lighting.
abstract: One kind of optical element combining Fresnel lens with microlens array is designed simply for LED lighting based on geometrical optics and nonimaging optics. This design method imposes no restriction on the source intensity pattern. The designed element has compact construction and can produce multiple shapes of illumination distribution. Taking square lighting as an example, tolerance analysis is carried out to determine tolerance limits for applying the element in the assembly process. This element can produce on-axis lighting and off-axis lighting.
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi'an, China.
authors.forename: Guangzhen
authors.initials: G
authors.lastname: Wang
authors.forename: Lili
authors.initials: L
authors.lastname: Wang
authors.forename: Fuli
authors.initials: F
authors.lastname: Li
authors.forename: Depeng
authors.initials: D
authors.lastname: Kong