Open AccessHigh performing micromachined retroreflector
Author(s) -
Axel Lundvall,
Fredrik Nikolajeff,
Tomas Lindström
Publication year - 2003
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.11.002459
Subject(s) - retroreflector , optics , materials science , reflection (computer programming) , corner reflector , surface micromachining , layer (electronics) , laser , optoelectronics , fabrication , physics , computer science , nanotechnology , medicine , alternative medicine , pathology , programming language
This paper reports on the realization of a type of micromachined retroreflecting sheeting material. The geometry presented has high reflection efficiency even at large incident angles, and it can be manufactured through polymer replication techniques. The paper consists of two parts: A theoretical section outlining the design parameters and their impact on the optical performance, and secondly, an experimental part comprising both manufacturing and optical evaluation for a candidate retroreflecting sheet material in traffic control devices. Experimental data show that the retroreflecting properties are promising. The retroreflector consists of a front layer of densely packed spherical microlenses, a back surface of densely packed spherical micromirrors, and a transparent spacer layer. The thickness of the spacer layer determines in part the optical characteristics of the retroreflector.