George W Hopkins

US Patent:

6981101, Dec 27, 2005

Filed:

Jul 20, 2001

Appl. No.:

09/910531

Inventors:

Steven C. Miller - Livermore CA, US
Daniel E. Lenoski - San Jose CA, US
Kevin Knecht - Chippewa Falls WI, US
George Hopkins - Chippewa Falls WI, US
Michael S. Woodacre - Sutton Benger, GB

Assignee:

Silicon Graphics, Inc. - Mountain View CA

International Classification:

G06F012/00

US Classification:

711141, 711120

Abstract:

A multiprocessor system and method includes a processing sub-system having a plurality of processors and a processor memory system. A scalable network is operable to couple the processing sub-system to an input/output (I/O) sub-system. The I/O sub-system includes a plurality of I/O interfaces. Each I/O interface has a local cache and is operable to couple a peripheral device to the multiprocessor system and to store copies of data from the processor memory system in the local cache for use by the peripheral device. A coherence domain for the multiprocessor system includes the processors and processor memory system of the processing sub-system and the local caches of the I/O sub-system.

US Patent:

20020161289, Oct 31, 2002

Filed:

Apr 30, 2001

Appl. No.:

09/846489

Inventors:

George Hopkins - Sunnyvale CA, US
Ganapati Mauze - Sunnyvale CA, US
Tirumala Ranganath - Palo Alto CA, US

International Classification:

G01N033/48

US Classification:

600/322000, 356/039000

Abstract:

A composite detector device that incorporates a plurality of types of detector elements to cover a broad wavelength range. There may be one or more individual detector elements of each detector type. The individual detector elements are positioned upon a single substrate so that when light from a sample passes through a spectral dispersing element, each detector element is exposed to light of a predetermined, limited wavelength range.

US Patent:

20030012230, Jan 16, 2003

Filed:

Jul 6, 2001

Appl. No.:

09/900412

Inventors:

George Hopkins - Sunnyvale CA, US
Mark McDonald - Milpitas CA, US
Nathan Shou - San Francisco CA, US

International Classification:

H01S003/10

US Classification:

372/020000

Abstract:

A laser employing a tapered, thin film interference filter as a tuning element. Tapered, thin film interference filters employing dielectric layers are disclosed for use in tuning lasers. Methods of tuning a laser by adjustably positioning a tapered thin film interference filter are disclosed. Also included are a method for tuning a laser to account or thermal wavelength drift, a method of mounting an etalon in a substantially stress free manner, and a mount therefor.

US Patent:

56443960, Jul 1, 1997

Filed:

Jun 20, 1995

Appl. No.:

8/492661

Inventors:

George W. Hopkins - Sunnyvale CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01J 318
G01J 344

US Classification:

356301

Abstract:

A spectrograph having a collimating lens unit, a reflective diffraction grating, a focusing lens unit, and a light detector is provided. The collimating lens unit has at least one optical element with at least one aspheric surface for collimating light from a light source. This lens unit has a positive optical power and a focal ratio of at most 1. 7. The reflective diffraction grating diffracts the collimated light from the collimating lens unit. The focusing lens unit also has at least one lens with at least one aspheric surface. It focuses the first order diffracted light on the light detector and has a focal length that provides an overall magnification of 0. 8 to 2. 0 when combined with the collimating lens unit and the diffraction grating.

US Patent:

51403528, Aug 18, 1992

Filed:

Oct 31, 1990

Appl. No.:

7/606741

Inventors:

Robert D. Moore - San Mateo CA
George W. Hopkins - Sunnyvale CA

Assignee:

Occipital, Inc. - San Mateo CA

International Classification:

A61B 314
G03B 700
G03B 2900

US Classification:

354 62

Abstract:

A method and apparatus are disclosed for converting the 35 mm image from a conventional fundus camera into a size suitable for recording by a conventional solid state CCD module. The CCD camera connects to the fundus camera using a bayonet attachment. The aerial image created by the fundus camera is received and transmitted through the CCD camera along a folded mirror optical path, and is reduced and aligned for detection by the CCD module. The optical path contains a pair of adjustable mirrors to allow compensation for variations in the focal lengths between various fundus cameras. An articulating mirror may be included to enable the user to pan across the aerial image while recording segmented views for reconstruction by an external computer into a composite, high resolution image.

US Patent:

47844876, Nov 15, 1988

Filed:

Jun 14, 1988

Appl. No.:

7/207037

Inventors:

George W. Hopkins - Sunnyvale CA
Barry G. Willis - Los Altos Hills CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01J 328
G01J 310

US Classification:

356326

Abstract:

An optical relay having a pair of simple lenses and an opaque barrier defining an aperture. In a spectrometer, the optical relay is positioned between a light source and an opaque barrier defining a slit to focus light of a reference wavelength w. sub. r onto the slit. The location of the aperture and the choice of w. sub. r are selected so that the flux of light through the slit is substantially flat as a function of wavelength.

US Patent:

57206503, Feb 24, 1998

Filed:

Feb 13, 1997

Appl. No.:

8/801108

Inventors:

Ganapati R. Mauze - Sunnyvale CA
George W. Hopkins - Sunnyvale CA
Tad Decatur Simons - Palo Alto CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B24C 300

US Classification:

451 75

Abstract:

A gas analysis apparatus for analysis of sample gas wherein the apparatus has a mechanism for cleaning optical elements such as reflectors and windows in the apparatus is provided. The gas analysis apparatus includes a light source for emitting light, a body having an isolated cavity in which the light emitted by the light source propagates, a detector for analyzing light scattered by the sample gas in the isolated cavity, and a spraying system connected to the body to spray a sublimable substance. The isolated cavity has one or more optical elements each with a surface. The spray of the sublimable substance is directed onto such a surface for in situ removal of contaminants. The body has a sample inlet port for introducing the sample gas into the cavity and an outlet port for venting gas from the cavity.

US Patent:

55066780, Apr 9, 1996

Filed:

Feb 24, 1992

Appl. No.:

7/840108

Inventors:

William F. Carlsen - Woodside CA
Tad D. Simons - Palo Alto CA
Richard J. Pittaro - San Carlos CA
George W. Hopkins - Sunnyvale CA
Damien F. Gray - Mountain Veiw CA

Assignee:

Hewlett Packard Company - Palo Alto CA

International Classification:

G01N 2100
G01J 3144

US Classification:

356338

Abstract:

A System for Collecting Weakly Scattered Electromagnetic Radiation is disclosed. The present invention overcomes problems suffered by previous collection systems by providing a reliable and efficient device for intensifying and collecting the scattered radiation generated by laser induced scattering. The present invention employs a laser source which illuminates an unknown gas contained by a long hollow tube having a highly reflective sheathing. The illuminating electromagnetic radiation from the laser is directed along the entire length of the tube and collides with the molecules of the unknown gas in the tube. The collisions cause the emission of weakly scattered electromagnetic radiation that is shifted in reference to the illuminating radiation. The sheathing is sufficiently reflective of the scattered radiation to substantially contain it. An exit is coupled to the long hollow tube in such a way that the scattered radiation may pass from the reflective sheathing and be collected for analysis.

Author:

George E. Hopkins

ISBN #:

0674012755

Author:

George E. Hopkins

ISBN #:

0896723577

Author:

George E. Hopkins

ISBN #:

0960970800

Author:

George W. Hopkins

ISBN #:

0892522208