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11.发明专利
公开(公告)号：SG35043A1
公开(公告)日：1997-02-01
申请号：SG1995002065
申请日：1995-12-07
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , ROSEN HAL JERVIS , RUBIN KURT ALLEN , TANG WADE WAI-CHUNG
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公开(公告)号：DE3379597D1
公开(公告)日：1989-05-18
申请号：DE3379597
申请日：1983-05-25
Applicant: IBM
Inventor： JAIN KANTILAL , LATTA MILTON RUSSELL , SINCERBOX GLENN TAVERNIA
Abstract: Apparatus for producing a light source of a desired shape from a light source such as a laser comprising means for directing the light source along a predetermined path 10 as a playback beam to impinge upon a hologram 12 at a predetermined angle to produce the continuous self-luminous source of the desired shape. The hologram is recorded upon a substrate 28 coated with a photosensitive material 30 by interference between recording and object beams 24, 48 derived from the same source 20 of coherent radiation. The recording beam 24 is directed toward the substrate at an orientation and angle so that the playback beam 10 is a conjugate of the recording beam. The object beam 48 is directed to the substrate 28 over a path which includes a diffuser plate 36 covered with an opaque material in all areas except for a continuous area which defines the desired shape. The part of the object beam which impinges upon the substrate is limited by a stop 17 which defines the numerical aperture.
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公开(公告)号：DE3476127D1
公开(公告)日：1989-02-16
申请号：DE3476127
申请日：1984-02-20
Applicant: IBM
Inventor： JAIN KANTILAL , LATTA MILTON RUSSELL
Abstract: Apparatus for improving the uniformity of the intensity distribution across the width of a light beam comprises primary optical means (16) for focusing the beam into a primary focus line (P) extending across the axis of the beam and a primary plane reflecting surface (18) located so as to reflect said beam in the region of the primary focus line. The primary plane reflecting surface is located so that the primary focus line extends parallel to and adjacent to the primary reflecting surface. The primary reflecting surface is inclined at a first angle to the axis of the beam so as to reflect the beam at a plane inclined at the first angle to the axis. The first angle may be zero so that the primary reflecting surface extends parallel to the axis of the beam. The apparatus may also include an additional primary plane reflecting surface (24) located adjacent to the primary focus line as to reflect the beam at a plane inclined at another angle to the axis of the beam. The apparatus may further include secondary plane reflecting surfaces similar to the primary plane reflecting surfaces for providing further reflection of the beam at planes at right angles to the planes of reflection provided by the primary plane reflecting surfaces.
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公开(公告)号：DE3365603D1
公开(公告)日：1986-10-02
申请号：DE3365603
申请日：1983-05-19
Applicant: IBM
Inventor： JAIN KANTILAL , LATTA MILTON RUSSELL
Abstract: A light source for a high resolution projection lithography system comprises a laser 10 and transforming optical apparatus which transforms the laser source into an optically equivalent self-luminous curved line source. The transforming optical apparatus comprises a two- dimensional array 20 of fly's eye lenses positioned to intercept a collimated parallel beam of light from the laser source and to produce a series of point or small area sources having a selected numerical aperture. An optical fibre array 22 is positioned so that the input end of each fibre receives the light output from one of the lenses in the array. The position of the input end of each fibre is chosen so that light from the illuminating lens underfills the fibre end to preserve the numerical aperture. The output ends of the fibres are arranged in position to produce a curved line source of a desired shape, e.g a quarter of an annulus. Alternate embodiments are described in which different lens arrays can be selectively positioned to change the numerical aperture of the transforming optical apparatus.
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Patent Agency Ranking
公开(公告)号：CZ293793B6
公开(公告)日：2004-08-18
申请号：CZ273597
申请日：1996-02-01
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , ROSEN HAL JERVIS , RUBIN KURT ALLAN , TANG WADE WAI-CHUNG
Abstract: The invented multiple data layer optical disk drive system has fixed aberration correction and uses a disk (12) with maximum interlayer spacing for reduced interlayer crosstalk. In one embodiment the multiple data layer disk (12)¿has a substrate with a thickness that is reduced by approximately one-half the thickness of the spacer layer (44) that separates the first and last data layers. The disk (12) is designed to operate with a lens (210) that has spherical aberration correction to compensate for the thickness of a conventional single data layer disk (12). This allows the disk drive to handle multiple data layer disks as well as to be backward compatible and thus handle conventional single data layer disks. The thickness of the substrate material plus one-half the thickness of the spacer layer material (which may have a different index of refraction than the substrate material) is equivalent, for purposes of spherical aberration correction, to the thickness of the substrate material used in the conventional single data layer disk. The focused spot with minimum spherical aberration is thus located at the middle of the spacer layer rather than one the first data layer. The spacer layer thickness is selected so that when the focused spot is located on either the first or last data layer there is some deliberately designed spherical aberration, although an amount that is acceptable. As a result, the thickness of the spacer layer can be significantly increased to thereby reduce interlayer crosstalk. In another embodiment, the substrate thickness and spacer layer thickness are selected and then the lens is corrected for spherical aberration corresponding to the thickness of substrate material plus one-half the thickness of spacer layer material.
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公开(公告)号：HU9801981A2
公开(公告)日：1998-12-28
申请号：HU9801981
申请日：1996-02-01
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , ROSEN HAL JERVIS , RUBIN KURT ALLAN , TANG WADE WAI-CHUNG
Abstract: A multiple data layer optical disk drive system has fixed aberration correction and uses a disk with maximum interlayer spacing for reduced interlayer crosstalk. In one embodiment the multiple data layer disk has a substrate with a thickness that is reduced by approximately one-half the thickness of the spacer layer that separates the first and last data layers. The disk is designed to operate with a lens that has spherical aberration correction to compensate for the thickness of a conventional single data layer disk. This allows the disk drive to handle multiple data layer disks as well as to be backward compatible and thus handle conventional single data layer disks. The thickness of the substrate material plus one-half the thickness of the spacer layer material (which may have a different index of refraction than the substrate material) is equivalent, for purposes of spherical aberration correction, to the thickness of the substrate material used in the conventional single data layer disk. The focused spot with minimum spherical aberration is thus located at the middle of the spacer layer rather than on the first data layer. The spacer layer thickness is selected so that when the focused spot is located on either the first or last data layer there is some deliberately designed spherical aberration, although an amount that is acceptable. As a result the thickness of the spacer layer can be significantly increased to thereby reduce interlayer crosstalk. In another embodiment that substrate thickness and spacer layer thickness are selected and then the lens is corrected for spherical aberration corresponding to the thickness of substrate material plus one-half the thickness of spacer layer material.
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公开(公告)号：PL322062A1
公开(公告)日：1998-01-05
申请号：PL32206296
申请日：1996-02-01
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , ROSEN HAL JERVIS , RUBIN KURT ALLAN , TANG WADE WAI-CHUNG
Abstract: A multiple data layer optical disk drive system has fixed aberration correction and uses a disk with maximum interlayer spacing for reduced interlayer crosstalk. In one embodiment the multiple data layer disk has a substrate with a thickness that is reduced by approximately one-half the thickness of the spacer layer that separates the first and last data layers. The disk is designed to operate with a lens that has spherical aberration correction to compensate for the thickness of a conventional single data layer disk. This allows the disk drive to handle multiple data layer disks as well as to be backward compatible and thus handle conventional single data layer disks. The thickness of the substrate material plus one-half the thickness of the spacer layer material (which may have a different index of refraction than the substrate material) is equivalent, for purposes of spherical aberration correction, to the thickness of the substrate material used in the conventional single data layer disk. The focused spot with minimum spherical aberration is thus located at the middle of the spacer layer rather than on the first data layer. The spacer layer thickness is selected so that when the focused spot is located on either the first or last data layer there is some deliberately designed spherical aberration, although an amount that is acceptable. As a result the thickness of the spacer layer can be significantly increased to thereby reduce interlayer crosstalk. In another embodiment that substrate thickness and spacer layer thickness are selected and then the lens is corrected for spherical aberration corresponding to the thickness of substrate material plus one-half the thickness of spacer layer material.
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公开(公告)号：DE3880353T2
公开(公告)日：1993-10-28
申请号：DE3880353
申请日：1988-02-02
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , STRAND TIMOTHY CARL
Abstract: A holographic mirror is used in an optical storage head to diffract a laser beam perpendicularly to the optical medium and also to focus the beam onto the optical medium. The mirror can also function to cause circularisation of a collimated laser beam of elliptical cross-section.
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公开(公告)号：DE3880353D1
公开(公告)日：1993-05-27
申请号：DE3880353
申请日：1988-02-02
Applicant: IBM
Inventor： LATTA MILTON RUSSELL , STRAND TIMOTHY CARL
Abstract: A holographic mirror is used in an optical storage head to diffract a laser beam perpendicularly to the optical medium and also to focus the beam onto the optical medium. The mirror can also function to cause circularisation of a collimated laser beam of elliptical cross-section.
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