title: Innovative design of light collimator based on a freeform microlens array.
abstract: In developing a daylighting system, the overall system efficiency is crucial. In the daylighting system, whether the light propagates parallel strongly affects the efficiency. In this paper, we simulate a multicurvature lens to collimate rays propagated from different angles. We describe a method based on a freeform microlens array, which increases transmission efficiency. Results show that with the freeform microlens array collimator, the light propagates provide at least 50.26% parallel and the efficiency increases by 24.76%, enhancing the core values of the daylighting system in building illumination.
authors.forename: Kung-Jeng
authors.initials: KJ
authors.lastname: Wang
authors.forename: Hsi-Chi
authors.initials: HC
authors.lastname: Chen
authors.forename: Xiao-Rong
authors.initials: XR
authors.lastname: Wu
authors.forename: Pao-Hung
authors.initials: PH
authors.lastname: Lin
authors.forename: Yi-Yung
authors.initials: YY
authors.lastname: Chen
authors.forename: Chia-Min
authors.initials: CM
authors.lastname: Lin
authors.forename: Yin-Ti
authors.initials: YT
authors.lastname: Chen
authors.forename: Allen Jong-Woei
authors.initials: AJ
authors.lastname: Whang
authors.forename: Chun-Han
authors.initials: CH
authors.lastname: Chou