Patent
Optical head, magneto-optical head, disk apparatus and manufacturing method of optical head
Kiichi Ueyanagi
- 26 Dec 2000
61
TL;DR: In this paper, an optical head, a magneto-optical head, and a disk apparatus that can realize high-density recording medium and perform high-speed recording and reproduction, and can prevent erroneous record or erroneous reproduction, is described.
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Abstract: The present invention relates to an optical head, a magneto-optical head, and a disk apparatus, that have high light efficiency, can realize high-density recording medium and perform high-speed recording and reproduction, and can prevent erroneous record or erroneous reproduction, and a manufacturing method of the optical head. When a converged beam enters an incident surface of a transparent condensing medium, its refracted beam is condensed on a light-condensed surface and forms a light spot. Since leaking out to an aperture formed on an outer surface of the light-condensed surface of this light spot, near field light is scattered by a micro metal member. In addition, since, also in the micro metal member, plasmon resonance occurs by the irradiation of a laser beam, near field light leaks out therefrom. This near field light becomes propagation light and enters a recording medium of a disk, and recording into the recording medium is performed by this light.
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Citations
Patent
Optical device and optical head using the same
Junichi Fujikata,Hitoshi Yokota,Tsutomu Ishi +2 more
- 13 Mar 2003
TL;DR: In this paper, a light incident upon one surface enhances an intensity transmitted though the hole, and a layer inserted as an intermediate layer between the first and the second surface of conductive films is introduced.
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TL;DR: In this article, a substrate of a target substance detection element is used for a detection apparatus for detecting the target substance using surface plasmon resonance (SPR) and a metal structure.
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Manabu Oumi,Nobuyuki Kasama,Hidetaka Maeda,Kenji Kato,Yoko Shinohara,Takashi Niwa,Yasuyuki Mitsuoka +6 more
- 16 Apr 2002
TL;DR: In this article, a near-field light-generating element has a support member and a minute aperture having a size smaller than the wavelength of incident light provided on the support member so as to produce near field light in response to incident light directed thereto.
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Nanostructures and lithographic method for producing highly sensitive substrates for surface-enhanced spectroscopy
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References
Patent
Near field magneto-optical recording system employing slit illumination
Gordon S. Kino
- 12 May 1998
TL;DR: In this paper, an optical recording and reproducing system including a read/write head assembly including an objective lens for reading or writing information on an adjacent magneto-optical recording medium is presented.
53
Patent
Optical disk data storage system with improved solid immersion lens
Harry Jonathon Mamin,Daniel Rugar,Bruce D. Terris +2 more
- 31 Mar 1998
TL;DR: In this paper, an air-bearing slider supports a solid immersion lens (SIL) with a patterned thin film formed at the focus of the SIL to act as a secondary radiation source.
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Patent
Super-resolution optical head using optical separator
Masahiko Sato
- 27 Dec 1994
TL;DR: In this paper, a super-resolution optical head device is proposed, in which a first superresolution spot having a diameter smaller than that of a diffraction limit is formed on a recording medium by modulating beams emitted from a laser light source.
27
Patent
Optical head and optical disk apparatus
Kamiyanagi Kiichi
- 28 Jul 2000
TL;DR: In this paper, the authors proposed a method to provide an optical head and an optical disk apparatus which are small and which can achieve a high recording density by using a collimating lens.
22