One approach to aberration compensation of an imaging system is to introduce a suitable phase mask at the aperture plane of an imaging system. We utilize this principle for the compensation of astigmatism. A suitable polarization mask used on the aperture plane together with a polarizer-retarder combination at the input of the imaging system provides the compensating polarization-induced phase steps at different quadrants of the apertures masked by different polarizers. The aberrant phase can be considerably compensated by the proper choice of a polarization mask and suitable selection of the polarization parameters involved. The results presented here bear out our theoretical expectation.
© 2004 Optical Society of America
(090.1000) Holography : Aberration compensation
(110.1220) Imaging systems : Apertures
(170.0110) Medical optics and biotechnology : Imaging systems
(230.5440) Optical devices : Polarization-selective devices
Dola Roy Chowdhury, Kallol Bhattacharya, Ajay K. Chakraborty, and Raja Ghosh, "Polarization-Based Compensation of Astigmatism," Appl. Opt. 43, 750-755 (2004)