Open AccessSpherical aberration correction suitable for a wavefront controller
Author(s) -
Hiromi Itoh,
Naoya Matsumoto,
Takashi Inoue
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.014367
Subject(s) - optics , wavefront , spherical aberration , liquid crystal on silicon , spatial light modulator , refractive index , lens (geology) , ray tracing (physics) , phase modulation , materials science , optical aberration , phase (matter) , liquid crystal , physics , phase noise , quantum mechanics
We propose a simple method to correct a large amount of spherical aberration caused by a refractive index mismatch. The method is based on inverse ray tracing and can generate correction phase patterns whose peak-to-valley values are minimized. We also demonstrated spherical aberration correction in a transparent acrylic block using a liquid-crystal-on-silicon spatial light modulator (LCOS-SLM). A distorted focal volume without correction was substantially improved with correction. This method is useful in cases where a large phase modulation is needed, such as when employing a high-NA lens or focusing a beam deep inside a sample.