Abstract

We describe a new type of optical pickup for use in high-density optical storage systems. By changing a conventional pickup design to include a glass element between the objective and the disk, the transverse resolution of the system can be increased by as much as a factor of 1.5. This system is also less sensitive than conventional systems to variations in disk thickness and disk tilt. We demonstrate how the system has been used as a microscope to inspect an optical disk and describe possible design configurations for an optical pickup.

© 1993 Optical Society of America

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References

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  1. S. Kubota, Appl. Opt. 26, 3961 (1987).
    [CrossRef] [PubMed]
  2. M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).
  3. W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).
  4. S. M. Mansfield, G. S. Kino, Appl. Phys. Lett. 57, 2615 (1990).
    [CrossRef]
  5. S. M. Mansfield, “Solid immersion microscopy,” Ph.D. dissertation (Department of Applied Physics, Stanford University, Stanford, Calif., 1992).
  6. G. S. Kino, T. R. Corle, Phys. Today 42(9), 55 (1989).
    [CrossRef]
  7. S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

1992 (1)

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

1990 (1)

S. M. Mansfield, G. S. Kino, Appl. Phys. Lett. 57, 2615 (1990).
[CrossRef]

1989 (2)

G. S. Kino, T. R. Corle, Phys. Today 42(9), 55 (1989).
[CrossRef]

M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).

1987 (1)

Corle, T. R.

G. S. Kino, T. R. Corle, Phys. Today 42(9), 55 (1989).
[CrossRef]

Dewey, A. G.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Funahashi, T.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Hurst, J. E.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Igarachi, S.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Iwaasa, S.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Juliana, A.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Kashiwagi, T.

M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).

Kino, G. S.

S. M. Mansfield, G. S. Kino, Appl. Phys. Lett. 57, 2615 (1990).
[CrossRef]

G. S. Kino, T. R. Corle, Phys. Today 42(9), 55 (1989).
[CrossRef]

Kobayashi, S.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Kozlovsky, W. J.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Kubota, S.

M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).

S. Kubota, Appl. Opt. 26, 3961 (1987).
[CrossRef] [PubMed]

Latta, M. R.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Mansfield, S. M.

S. M. Mansfield, G. S. Kino, Appl. Phys. Lett. 57, 2615 (1990).
[CrossRef]

S. M. Mansfield, “Solid immersion microscopy,” Ph.D. dissertation (Department of Applied Physics, Stanford University, Stanford, Calif., 1992).

Ogawa, M.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Oka, M.

M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).

Page, D. A.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Payne, R. N.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Senshu, S.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Wach, S.

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

Werlich, H.

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Appl. Opt. (1)

Appl. Phys. Lett. (1)

S. M. Mansfield, G. S. Kino, Appl. Phys. Lett. 57, 2615 (1990).
[CrossRef]

Phys. Today (1)

G. S. Kino, T. R. Corle, Phys. Today 42(9), 55 (1989).
[CrossRef]

Proc. Soc. Photo-Opt. Instrum. Eng. (2)

M. Oka, T. Kashiwagi, S. Kubota, Proc. Soc. Photo-Opt. Instrum. Eng. 1139, 149 (1989).

W. J. Kozlovsky, A. G. Dewey, A. Juliana, J. E. Hurst, M. R. Latta, D. A. Page, R. N. Payne, H. Werlich, Proc. Soc. Photo-Opt. Instrum. Eng. 1663, 410 (1992).

Other (2)

S. M. Mansfield, “Solid immersion microscopy,” Ph.D. dissertation (Department of Applied Physics, Stanford University, Stanford, Calif., 1992).

S. Kobayashi, S. Senshu, S. Iwaasa, S. Igarachi, S. Wach, T. Funahashi, M. Ogawa, in Digest of Meeting on Optical Data Storage (Optical Society of America, Washington, D.C., 1992), p. 24.

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Figures (4)

Fig. 1
Fig. 1

Storage disk system showing disk layers.

Fig. 2
Fig. 2

Solid immersion lens with refractive index of 1.5 to match the refractive index of the storage disk.

Fig. 3
Fig. 3

Images of a CD-type optical disk taken with λ = 546 nm, using an SIL with an effective N.A. of 1.05 and a radius of 4 mm, of structures of different pitches: (a) 13.2 μm, (b) 1.1 μm, (c) 0.55 μm.

Fig. 4
Fig. 4

Measured MTF taken with an SIL with a 50-μm air gap, λ = 546 nm, and an effective N.A. of 0.6.

Equations (3)

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δ Φ = W 40 = Δ t 8 ( n 2 1 n 3 ) sin 4 θ ,
W 40 = ( Δ t ) 2 8 a n ( n 1 ) sin 4 θ 0 ,
W 40 = h 8 n 2 ( n 2 1 ) sin 4 θ 0 ,

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