Rajpal S. SIROHI,¹ Tomoaki EIJU,² Kiyofumi MATSUDA² and Thomas H. BARNES³

¹Applied Optics Laboratory, Physics Department, Indian Institute of Technology, Madras 600036, India, ²Applied Physics and Information Sciences Department, Mechanical Engineering Laboratory, Namiki 1-2, Tsukuba, Ibaraki, 305 Japan, ³Physics Department, Auckland University, Auckland, New Zealand

(Accepted August 29, 1994)

It is shown that a multiple beam wedge plate shear interferometry can be used to represent the lateral aberration curve of a lens more accurately. For larger shear, some new artifacts appear in the interferogram which have been explained by considering contributions of higher order terms in the Taylor's series expansion of the path function.

Key words : lens lateral aberration, shear-interferometry, lens testing, multiple interference