Adaptability of glass properties estimating model for GRIN optic elements

Glass properties estimating models based on uniform and stress free glasses encounter certain discrepancy from measured value when being used for refractive index change (DeltaN) estimation in gradient index (GRIN) optic element prepared by ion exchange. A comparison was made between HSD model and Gan Fuxi model in this paper. Result shows that Can Fuxi model generates relatively low aberration when being used to calculate in lightly stressed GRIN optic element, but becomes invalid in heavily stressed GRIN optic element; While HSD model is much more adaptive on estimating in heavily stressed GRIN optic element, for involving polarizability factor and volume factor of glass composition separately.