Ian M Redmond

Author:

Ian Redmond

ISBN #:

0531183548

Author:

Ian Redmond

ISBN #:

0679838805

Author:

Ian Redmond

ISBN #:

0679873325

Author:

Ian Redmond

ISBN #:

0763616346

Author:

Ian Redmond

ISBN #:

0836801415

Author:

Ian Redmond

ISBN #:

0836801164

Author:

Ian Redmond

ISBN #:

0789458721

Author:

Ian Redmond

ISBN #:

0789465914

US Patent:

6717893, Apr 6, 2004

Filed:

Oct 4, 2000

Appl. No.:

09/680106

Inventors:

David W. Niss - Boulder CO
Thomas E. Berg - Fort Collins CO
Robert D. Freeman - Erie CO
Ian R. Redmond - Boulder CO
Scott D. Abrahamson - Longmont CO

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B 700

US Classification:

369 4419, 369 4412, 369 4423, 369121, 36911212, 369 1332

Abstract:

An optical pickup assembly includes an optical pickup unit (OPU), a thermally conductive plate, and a flex circuit. The flex circuit is mounted atop the plate. The OPU is also mounted atop the plate through a cutout of the flex circuit. Alternatively, the flex circuit is mounted below the plate and the OPU is mounted atop the plate. The optical pickup assembly further includes an actuator arm. The OPU is mounted on the actuator arm with a portion of the plate contacting the actuator arm.

US Patent:

6873580, Mar 29, 2005

Filed:

May 1, 2001

Appl. No.:

09/846052

Inventors:

Erik J. Zimmer - Denver CO, US
Scott D. Wilson - Westminster CO, US
Ian R. Redmond - Boulder CO, US
Bernard W. Bell - Lafayette CO, US
Daniel G. Bergeson - Arvada CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B007/00

US Classification:

369 4412, 36911228

Abstract:

Disclosed is a method of attaching components of an optical head. In one embodiment, first and second optical assemblies of the optical head are positioned adjacent to each other. The first optical assembly may include a first optical element, and the second optical assembly may include a second optical element. Both of the first and second optical elements are configured to transmit light for reading or writing data to an optical data storage media. The position of a first optical assembly is adjusted with respect to the second optical assembly until the first optical element and second optical elements are in optical communication with each other. Thereafter, the first and second optical assemblies are rigidly connected while the first and second optical elements are in optical communication with each other.

US Patent:

6908725, Jun 21, 2005

Filed:

Mar 25, 2002

Appl. No.:

10/107854

Inventors:

David L. Blankenbeckler - Longmont CO, US
Brian S. Medower - Boulder CO, US
Ian R. Redmond - Boulder CO, US
David H. Davies - Boulder CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B007/26

US Classification:

43027013, 430945, 428 644, 3692752, 3692755, 3692751

Abstract:

An optical disk has a multi-layer tuned optical coating overlying both small bumps to store pre-recorded information and lands onto which information is written to and read. The optical coating includes a phase-change metal/alloy layer formed over the disk substrate and a dielectric layer formed over the phase-change layer. An optical disk according to the invention has specific topological features and sizes.

US Patent:

6914724, Jul 5, 2005

Filed:

Oct 22, 2002

Appl. No.:

10/278719

Inventors:

Ian R. Redmond - Boulder CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G02B027/10
B29D011/00

US Classification:

359619, 359642, 216 24

Abstract:

Micro lenses are fabricated using processes which operate on multiple lenses at a time. In one embodiment, wafer-scale processing includes employing photolithography for defining gray-scale masks which permit relatively smooth or continuous curvatures of lens surfaces to be formed by, e. g. , reactive ion etching. Processes and materials are used which achieve desired etching at a sufficiently rapid rate such as etching to a depth of about 200 micrometers in less than about 10 hours. Wafer-scale molding processes can also be used. Diffractive features can be formed on or adjacent lens surfaces to provide functions such as dispersion correction. Also, sub-wavelength scale features may be etched to provide quarter-wave plate functionality, birefringence, anti-reflective functions and the like. Structures such as mounting rings and/or crash stops can be formed integrally with the lens body, eliminating the need to glue or otherwise couple separate components.

US Patent:

6914868, Jul 5, 2005

Filed:

Mar 31, 2000

Appl. No.:

09/540657

Inventors:

Ian Redmond - Boulder CO, US
Bernard Bell - Lafayette CO, US
David L. Blankenbeckler - Longmont CO, US
Michael F. Braitberg - Boulder CO, US
Robert D. Freeman - Erie CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B007/00

US Classification:

36911201, 369120

Abstract:

An optical head of a type useable in a optical disk reader/writer is provided. The optical head has a low profile, e. g. , in a vertical direction parallel to the disk spin axis, such as less than about 5 mm preferably less than about 3 mm. Substantially all components of the optical system, including a laser source, objective lens, intervening optics and photo detector are provided in the optical head and mounted in a fixed position with respect to one another. Substantially all optical components of the optical head are moved as a unit, e. g. , during tracking and/or focusing. Preferably, the optical head is fabricated using wafer scale and/or stacking technologies, e. g. , stacking substantially planar components to achieve the final optical head configuration.

US Patent:

7079472, Jul 18, 2006

Filed:

Jan 16, 2001

Appl. No.:

09/764026

Inventors:

Ian Redmond - Boulder CO, US
Bernard Bell - Lafayette CO, US
Curt Shuman - Colorado Springs CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B 7/135

US Classification:

36911219

Abstract:

An optical head of a type useable in a optical disk reader/writer is provided. One of the optical elements is provided in a fashion that one or more optical parameters or characteristics of the system are invariant, regardless of whether the one optical element is used, or not. In one embodiment the optical element is a beamshaper. In order to provide the desired invariant property, the surfaces of the optical element are preferably formed with high accuracy. One manner of economically achieving high accuracy is to measure errors or imperfections in a first formed, preferably etched, surface and adjust the shape or position of a second aligned etched surface so as to at least partially compensate for the errors or imperfections.

US Patent:

7227817, Jun 5, 2007

Filed:

Dec 7, 1999

Appl. No.:

09/457104

Inventors:

Ian Redmond - Boulder CO, US
Bernard Bell - Lafayette CO, US
David L. Blankenbeckler - Longmont CO, US
Michael F. Braitberg - Boulder CO, US
Robert D. Freeman - Erie CO, US

Assignee:

DPHI Acquisitions, Inc. - Boulder CO

International Classification:

G11B 7/00

US Classification:

369 4419, 369 4414, 369 4423, 36911201, 369119

Abstract:

An optical head of a type useable in a optical disk reader/writer is provided. The optical head has a low profile, e. g. , in a vertical direction parallel to the disk spin axis, such as less than about 5 mm preferably less than about 3 mm. Substantially all components of the optical system, including a laser source, objective lens, intervening optics and photo detector are provided in the optical head and mounted in a fixed position with respect to one another. Substantially all optical components of the optical head are moved as a unit, e. g. , during tracking and/or focusing. Preferably, the optical head is fabricated using wafer scale and/or stacking technologies, e. g. , stacking substantially planar components to achieve the final optical head configuration.

US Patent:

7368222, May 6, 2008

Filed:

May 11, 2001

Appl. No.:

09/854333

Inventors:

Brian S. Medower - Boulder CO, US
Ian R. Redmond - Boulder CO, US
David H. Davies - Boulder CO, US

Assignee:

DPHI Acquisitions, Inc. - Longmont CO

International Classification:

G11B 7/24

US Classification:

43027013, 430945, 3692755, 3692752, 428 646

Abstract:

Disclosed is an optical data storage medium with enhanced contrast. The optical data storage medium includes a substrate having oppositely facing first and second surfaces. A first metal/alloy layer is formed overlaying the first surface of the substrate. The first metal/alloy layer is formed from tin, antimony and element selected from the group consisting of indium, germanium, aluminum, and zinc. After the first metal/alloy layer is formed, a first dielectric layer is formed overlaying the first metal/alloy layer. This dielectric layer is formed from silicon oxynitride. The first metal/alloy layer is positioned between the substrate and the first dielectric layer.