Abstract
We discuss the influence of a movement of the stop on the quality of a slightly inclined Gaussian beam focused with a zone plate. First we examine the diffraction of a complex-source-point spherical wave through a zone plate which is not in contact with an aperture stop. Then we find an expression of the fourth order-corrected Gaussian beam which is represented in terms of Seidel-type wavefront aberrations. The derived formula is also used to analyze how the aberrations work on the quality of the diffracted Gaussian beam. In cases where the spot size of the incident beam is small compared with the principal focal length of the zone plate, we show that the quality of a slightly inclined beam of diffracted order m>0 (or m<0) can be improved by shifting the stop from the zone plate in the negative (or positive) z direction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Optik - International Journal for Light and Electron Optics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
