title: Talbot interferometry in noncollimated illumination for curvature and focal length measurements.
abstract: We describe a simple method for measuring the radius of curvature by using Talbot interferometry in a noncollimated light beam. This scheme can also be used to determine the focal length of the collimating lens employed in the setup. Results of the measurements are presented. A discussion of achievable accuracies and the proper choice of parameters is included.
authors: K V
authors: KV
authors: Sriram
authors: M P
authors: MP
authors: Kothiyal
authors: R S
authors: RS
authors: Sirohi