1.
Appl Opt
; 40(31): 5600-9, 2001 Nov 01.
Article
in English
| MEDLINE
| ID: mdl-18364847
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.