Translator Disclaimer
6 November 2015 Influence of aberrations in microholographic recording
Author Affiliations +
Abstract
The influence of various types of aberrations (spherical, coma, and astigmatic) of recording and readout beams on the readout signal in a microholographic recording was investigated through a numerical simulation. The simulation conditions were that the wavelength of the laser was 405 nm and the numerical aperture of the objective lenses was 0.85. The tolerance of the root-mean-square (RMS) wavefront aberrations was defined as the aberration when the normalized signal level decreased to 0.8. Among the three types of aberrations, the influence of the spherical aberration was the most significant. When both the recording and readout beams were aberrated and the signs of the aberrations were in the worst case, the tolerance of the RMS wavefront aberrations was less than half of the Maréchal’s criterion. Moreover, when the RMS wavefront aberrations of the recording and readout beams were within the above tolerance, the bit intervals of 0.13 and 0.65  μm in the inplane and vertical directions, respectively, which correspond to the recording density of 91  bit/μm3 (recording capacity of 16 TB for a 120-mm-diameter optical disk having a 300-μm-thick recording layer), were shown to be feasible for confocal detection with an allowable signal-to-noise ratio.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2015/$25.00 © 2015 SPIE
Ryuichi Katayama "Influence of aberrations in microholographic recording," Optical Engineering 54(11), 117104 (6 November 2015). https://doi.org/10.1117/1.OE.54.11.117104
Published: 6 November 2015
JOURNAL ARTICLE
11 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Practical Tilted Mirror Systems
Proceedings of SPIE (December 19 1986)
Phase change optical disc of 20 GB capacity using NRZI+,...
Proceedings of SPIE (September 16 2003)
Is a round focus spot better than an oval shaped...
Proceedings of SPIE (June 28 1999)

Back to Top