Talbot interferometry in noncollimated illumination for curvature and focal length measurements.
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.
Sriram
K V
KV
Kothiyal
M P
MP
Sirohi
R S
RS