Refractive index and dispersion of transparent 3D printing photoresins (original) (raw)

Optical Materials Express, 2021

Abstract

The refractive index of commonly used 3D printing photosensitive resins were measured across the visible spectrum for s- and p-polarized light for the first time. Commercially available resins (Monoprice Clear and formlabs Clear) and a custom polyethylene glycol diacrylate photopolymer resin was characterized using a critical angle determination method with a Pulfrich-based refractometer setup. The refractive indices ranged between 1.505 − 1.533 across the visible spectrum (670 − 405 nm, respectively), while the Abbe number ranged between 44.4 − 67.8.

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