title: Only one fitting for bironchigrams.
abstract: We present an algorithm that uses a square grid in a Ronchi test. We assume that the point coordinates of this pattern (termed a bironchigram) are affected by Gaussian errors. To calculate the optical path difference, we apply only one nonlinear least-squares fit to the dot coordinates. The relevant equations are deduced, and experimental results are shown.
authors: A
authors: A
authors: Cordero-Dávila
authors: J M
authors: JM
authors: Nu Ez-Alfonso
authors: E
authors: E
authors: Luna-Aguilar
authors: C I
authors: CI
authors: Robledo-Sánchez