Liquid crystal lens for compensation of spherical aberration in multilayer optical data storage

Suk Ho Chung, Seong Wook Choi, Young-Joo Kim, Han Jin Ahn, Hong Koo Baik

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In multilayer recording, it is strongly required to compensate the spherical aberration caused by a difference in substrate thickness. A novel liquid crystal (LC) lens is designed and fabricated to compensate the spherical aberration in this study. The new structure of the LC lens includes both concave and convex surfaces, which can compensate the spherical aberration with a relatively long range. Since a previously developed LC panel showed a very low tolerance to the shift of an objective lens, a new component has been proposed with a special LC lens structure to improve both the tolerance and compensation range. By optimized curvature control with a spherical LC lens, the aberration of a Blu-ray optical pickup can be maintained at 0.018λrms even for a thickness variation of ±25 μm. Finally, the LC lens has been fabricated using a standard one drop filling (ODF) process and evaluated by measuring the variation in focal length as a function of applied voltage.

Original languageEnglish
Pages (from-to)1152-1157
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number2 B
DOIs
Publication statusPublished - 2006 Feb 24

Fingerprint

Optical data storage
data storage
Aberrations
Liquid crystals
aberration
Lenses
Multilayers
liquid crystals
lenses
Pickups
Compensation and Redress
rays
recording
curvature
shift
sensors
Electric potential
electric potential
Substrates

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "In multilayer recording, it is strongly required to compensate the spherical aberration caused by a difference in substrate thickness. A novel liquid crystal (LC) lens is designed and fabricated to compensate the spherical aberration in this study. The new structure of the LC lens includes both concave and convex surfaces, which can compensate the spherical aberration with a relatively long range. Since a previously developed LC panel showed a very low tolerance to the shift of an objective lens, a new component has been proposed with a special LC lens structure to improve both the tolerance and compensation range. By optimized curvature control with a spherical LC lens, the aberration of a Blu-ray optical pickup can be maintained at 0.018λrms even for a thickness variation of ±25 μm. Finally, the LC lens has been fabricated using a standard one drop filling (ODF) process and evaluated by measuring the variation in focal length as a function of applied voltage.",
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Liquid crystal lens for compensation of spherical aberration in multilayer optical data storage. / Chung, Suk Ho; Choi, Seong Wook; Kim, Young-Joo; Ahn, Han Jin; Baik, Hong Koo.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 2 B, 24.02.2006, p. 1152-1157.

Research output: Contribution to journalArticle

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AU - Baik, Hong Koo

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