Predictive aberration correction for multilayer optical data storage

Booth, Martin J.; Schwertner, Michael; Wilson, Tony; Nakano, Masaharu; Kawata, Yoshimasa; Nakabayashi, Masahito; Miyata, Sou

doi:10.1063/1.2166684

Cited by 35 publications

(20 citation statements)

References 9 publications

(8 reference statements)

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“…The data can therefore be written easily in a particular layer of the storage medium without affecting the adjacent layers 6,7 . However, since aberrations reduce the focal spot intensity, the efficiency of a non-linear process is considerably reduced.…”

Section: Aberration Corrected Recordingmentioning

confidence: 99%

“…In order to demonstrate the adaptive optics system we used multi-layer recording media consisting of several photo-sensitive layers separated by inert spacing layers 6 . The 8 µm thick spacers consisted of PMMA whereas the 1.5 µm thick recording layers were a pressure sensitive adhesive incorporating 1,3,3,-Trimethylindolino-6'-nitrobenzopyrylospiran, a dye that absorbs in the UV.…”

Section: Confocal Microscope Readoutmentioning

confidence: 99%

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Adaptive optics for microscopy, optical data storage, and micromachining

Schwertner

Booth²,

Wilson

2006

SPIE Proceedings

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Many high-resolution optical methods are affected by the presence of optical aberrations. These include microscopy, three-dimensional optical data storage and optical micromachining. We investigate the use of adaptive aberration correction applied to these techniques. In particular, it is shown how a deformable membrane mirror can be used to correct the aberrations when focusing deep into a multilayer optical data storage medium for both recording and read-out of data. Aberration correction for optical micromaching deep inside a substrate is also demonstrated.

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Section: Aberration Corrected Recordingmentioning

confidence: 99%

Section: Confocal Microscope Readoutmentioning

confidence: 99%

Adaptive optics for microscopy, optical data storage, and micromachining

Schwertner

Booth²,

Wilson

2006

SPIE Proceedings

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“…In the first two references, the aberration correction was carried out using SLMs, while in the third case it was carried out using objective lenses and a variable pupil. Other aberration-correction methods include the use of deformable mirror membranes [19]. We propose and demonstrate two simple yet useful schemes to cancel the effect of the glass substrate when FZLs are used in the u-v configuration.…”

Section: Introductionmentioning

confidence: 99%

Characterization and correction of spherical aberration due to glass substrate in the design and fabrication of Fresnel zone lenses

Anand

Bhattacharya

2013

Appl. Opt.

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As with a conventional lens, a Fresnel zone lens (FZL) can be used to image objects at infinity or nearby. In the latter case, the FZL converts a diverging spherical wavefront into a converging spherical wavefront. The glass substrate on which the FZL is fabricated introduces spherical aberration resulting in a shift of the image plane and blurring of the image. Two novel schemes for correction of this spherical aberration are proposed and studied in this paper. To demonstrate them, FZLs are designed with and without aberration correction. They are fabricated using electron beam direct writing. The devices are evaluated and the accuracy of the proposed aberration correction schemes is validated.

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“…EDOF with a generalized cubic phase mask (GCPM) has been successfully studied in 3D computational microscopy 2 . In addition, adaptive optics and depth-variant deconvolution algorithms 6 have also been used to counteract spherical aberration [7][8][9] . A strata based model in the restoration process 5 represents the volume using multiple PSFs computed at specific depths to mitigate the depth variability of the PSFs.…”

Section: Introductionmentioning

confidence: 99%

Reducing depth induced spherical aberration in 3D widefield fluorescence microscopy by wavefront coding using the SQUBIC phase mask

et al. 2014

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Imaging thick biological samples introduces spherical aberration (SA) due to refractive index (RI) mismatch between specimen and imaging lens immersion medium. SA increases with the increase of either depth or RI mismatch. Therefore, it is difficult to find a static compensator for SA 1 . Different wavefront coding methods 2,3 have been studied to find an optimal way of static wavefront correction to reduce depth-induced SA. Inspired by a recent design of a radially symmetric squared cubic (SQUBIC) phase mask that was tested for scanning confocal microscopy 1 we have modified the pupil using the SQUBIC mask to engineer the point spread function (PSF) of a wide field fluorescence microscope. In this study, simulated images of a thick test object were generated using a wavefront encoded engineered PSF (WFE-PSF) and were restored using space-invariant (SI) and depth-variant (DV) expectation maximization (EM) algorithms implemented in the COSMOS software 4 . Quantitative comparisons between restorations obtained with both the conventional and WFE PSFs are presented. Simulations show that, in the presence of SA, the use of the SIEM algorithm and a single SQUBIC encoded WFE-PSF can yield adequate image restoration. In addition, in the presence of a large amount of SA, it is possible to get adequate results using the DVEM with fewer DV-PSFs than would typically be required for processing images acquired with a clear circular aperture (CCA) PSF. This result implies that modification of a widefield system with the SQUBIC mask renders the system less sensitive to depth-induced SA and suitable for imaging samples at larger optical depths.

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Predictive aberration correction for multilayer optical data storage

Cited by 35 publications

References 9 publications

Adaptive optics for microscopy, optical data storage, and micromachining

Adaptive optics for microscopy, optical data storage, and micromachining

Characterization and correction of spherical aberration due to glass substrate in the design and fabrication of Fresnel zone lenses

Reducing depth induced spherical aberration in 3D widefield fluorescence microscopy by wavefront coding using the SQUBIC phase mask

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