Answers are grounded in this paper and cite their sources.
A modified Ronchi test with an extended source is presented. By the use of a matched pair of source grating and Ronchi grating, a pure shearogram between two shifted wave fronts is obtained, and the extra interference with other disturbing grating orders is largely suppressed by the use of a specific grating layout.
No takes yet. Share an insight, caveat, or question.
Braat et al. (1999) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: