Design and analysis of quantized micro gradient index lens

Three methods of quantization are employed to design quantized GRIN lens, whose optical properties are expected to approach that of the ideal one. Detail operations for quantization are described in this paper. In order to verify and check the validities of the methods, full-vector BPM method has been carried out to simulate the focus properties of the quantized GRIN lens, and that of the ideal one for comparison. Analysis indicates that all the quantized GRIN lenses perform similar optical properties as the ideal one does. Thereinto, the performances of the GRIN lens quantized equally according to n(r) and the one quantized with hybrid method are quite close to that of the ideal GRIN lens. The methods of quantization presented in this paper can be as the reference framework for designing expected GRIN lenses before fabricating them with a simpler process of definite parameters. (C) 2013 Elsevier GmbH. All rights reserved.