title: Bidirectional scattering distribution function by screen imaging synthesis.
abstract: Light-emitting diodes are common light sources in modern lighting. The optical distribution of an LED package and the bidirectional scattering distribution function (BSDF) of diffusing optical components are important factors in lighting design. This paper proposes an innovative method of measuring both the optical distribution of LEDs and BSDF quickly. The proposed method uses a 2-D screen and a camera to capture the illumination on a screen, and acquires the whole-field optical distribution by synthesizing the images on the screen in different angles. This paper presents theoretical calculations and experimental results demonstrating the construction of the BSDF.
authors.affiliation: Department of Optics and Photonics, National Central University, Chung-Li, Taiwan.
authors.forename: Yeh-Wei
authors.initials: YW
authors.lastname: Yu
authors.forename: Yen-Lin
authors.initials: YL
authors.lastname: Chen
authors.forename: Wei-Hsin
authors.initials: WH
authors.lastname: Chen
authors.forename: Hen-Xiang
authors.initials: HX
authors.lastname: Chen
authors.forename: Xuan-Hao
authors.initials: XH
authors.lastname: Lee
authors.forename: Che-Chu
authors.initials: CC
authors.lastname: Lin
authors.forename: Ching-Cherng
authors.initials: CC
authors.lastname: Sun
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D007834:Lasers; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008962:Models, Theoretical; D055096:Optical Devices; D010781:Photography / Q000295:instrumentation; D012542:Scattering, Radiation