Gregory O Walsh

US Patent:

7323670, Jan 29, 2008

Filed:

Mar 16, 2005

Appl. No.:

11/081354

Inventors:

Gregory C. Walsh - Walnut Creek CA, US
Ralph Storz - Colts Neck NJ, US
Alan Aindow - Alameda CA, US

Assignee:

Leica Geosystems HDS LLC - San Ramon CA

International Classification:

G01J 1/32

US Classification:

250205, 372 30, 356 501

Abstract:

The performance of a laser scanner is optimized in the field by automatically determining appropriate laser parameters for the scan location. A laser control system uses information such as the environmental temperature to select an appropriate range of start points for various laser parameters, such as pump temperature and laser currents. Test pulses over that range can be used to determine optimal operating parameters. In order to also meet safety regulations, the laser control system can use information such as range and pulse timing information to fire regularly spaced pulses that do not exceed acceptable exposure limits. Alternatively, the laser can be operated at a regular speed of about 24 Hz, or can be operated in burst mode where a burst of pulses creates what appears to be a brighter scan spot, but the time delay between bursts allows time for a blink reflex.

US Patent:

7461076, Dec 2, 2008

Filed:

Jul 25, 2000

Appl. No.:

09/625518

Inventors:

Craig David Weissman - San Francisco CA, US
Gregory Vincent Walsh - Incline Village NV, US
Eliot Leonard Wegbreit - Palo Alto CA, US
Ankur S. Jain - Sunnyvale CA, US

Assignee:

Epiphany, Inc. - San Mateo CA

International Classification:

G06F 7/00
G06F 17/00

US Classification:

707102, 707101, 707103 R

Abstract:

A method of defining a well-formed database system by defining the organization of the data in the database, and by defining the operations for that data, is described. The definition can be used to automatically create and populate the well-formed database system. The well-formed database system conforms to rules of correctness and produces results that conform to the rules. The organization is defined by a data organization definition that specifies tables, their columns, and the relationships between tables. The operations define procedures that operate on the tables and the table columns. Importantly, the operations are defined along with the tables, columns, and relationships, so that the resulting system is well-formed.

US Patent:

7643135, Jan 5, 2010

Filed:

Dec 5, 2008

Appl. No.:

12/329449

Inventors:

Gregory Charles Walsh - Walnut Creek CA, US

Assignee:

Leica Geosystems AG - Heerbrugg

International Classification:

G01B 11/26

US Classification:

356140

Abstract:

An embodiment of the invention includes using a set of telescopes to calibrate a three dimensional optical scanner. Three separate calibrations are disclosed for a survey grade calibration: (1) angular calibration, implemented using at least one anti-podal pair of telescopes, (2) range calibration, implemented using at least one telescope mounted fiber recirculator, and (3) tilt calibration, implemented using at least one pair of telescopes not mounted in anti-podal configuration and an integral tilt table. Methods for aligning or measuring the mis-alignment between anti-podal telescope pairs are also described.

US Patent:

7649617, Jan 19, 2010

Filed:

Sep 10, 2007

Appl. No.:

11/900063

Inventors:

Gregory C. Walsh - Walnut Creek CA, US

Assignee:

Leica Geosystems AG - Heerbrugg

International Classification:

G01C 3/08

US Classification:

356 501, 356 401, 356 41, 356 51, 356 515

Abstract:

A light detection system duplicates the dynamic range of low intensity non-cooperative targets for high intensity cooperative targets. Both dynamic ranges of return light pulses are supported at the same time. In one embodiment, two beam splitters are used to reduce the intensity of reflected light that is received from high intensity sources to levels that can be accurately ranged. Ambiguity between the two paths is resolved by using an additional detector. Alternatively, one beam splitter is used to reduce the intensity of reflected light that is received from high intensity sources to levels that can be accurately ranged. The beam splitter system increases the effective dynamic range of the detection and ranging system passively without any need to reconfigure the system.

US Patent:

7697581, Apr 13, 2010

Filed:

Nov 28, 2007

Appl. No.:

11/998095

Inventors:

Gregory C. Walsh - Walnut Creek CA, US
Ralph Storz - Colts Neck NJ, US

Assignee:

Leica Geosystems AG - Heerbrugg

International Classification:

H01S 3/00

US Classification:

372 33, 372 30, 372 2902, 356 501

Abstract:

The performance of a laser scanner is optimized in the field by automatically determining appropriate laser parameters for the scan location. A laser control system uses information such as the environmental temperature to select an appropriate range of start points for various laser parameters, such as pump temperature and laser currents. Test pulses over that range can be used to determine optimal operating parameters.

US Patent:

7701558, Apr 20, 2010

Filed:

Sep 21, 2007

Appl. No.:

11/903302

Inventors:

Gregory C. Walsh - Walnut Creek CA, US
Alan Aindow - Alameda CA, US

Assignee:

Leica Geosystems AG - Heerbrugg

International Classification:

G01C 3/08

US Classification:

356 501, 356 401, 356 41, 356 51, 356 515

Abstract:

Methods for using spectrally separated light pulses to collect more LIDAR information are presented. In one embodiment, a monochromatic pulse is transmitted to collect range information and a white pulse is transmitted a short time afterwards to collect spectral responsivity information or color of the target. In another embodiment, the white light pulse is used to collect both range and spectral responsivity information of the target. In another embodiment, the spectral separated laser is spatially spread in order to collect range information over more than one point at a time.

US Patent:

7739224, Jun 15, 2010

Filed:

May 6, 1998

Appl. No.:

09/073748

Inventors:

Craig David Weissman - Belmont CA, US
Gregory Vincent Walsh - Cupertino CA, US
Eliot Leonard Wegbreit - Palo Alto CA, US

Assignee:

Infor Global Solutions (Michigan), Inc. - Bingham Farms MI

International Classification:

G06F 7/00
G06F 17/00
G06F 17/30
G06F 15/16

US Classification:

707102, 707 3, 707 8, 707 10, 707101, 707103 R, 7071041, 709201

Abstract:

A method of defining a well-formed database system by defining the organization of the data in the database, and by defining the operations for that data, is described. The definition can be used to automatically create and populate the well-formed database system. The well-formed database system conforms to rules of correctness and produces results that conform to the rules. The organization is defined by a data organization definition that specifies tables, their columns, and the relationships between tables. The operations define procedures that operate on the tables and the table columns. Importantly, the operations are defined along with the tables, columns, and relationships, so that the resulting system is well-formed.

US Patent:

7797120, Sep 14, 2010

Filed:

Dec 5, 2008

Appl. No.:

12/329455

Inventors:

Gregory Charles Walsh - Walnut Creek CA, US

Assignee:

Leica Geosystems AG - Heerbrugg

International Classification:

G01B 11/26

US Classification:

702 94, 356140, 73 175, 73 176

Abstract:

An embodiment of the invention includes using a set of telescopes to calibrate a three dimensional optical scanner. Three separate calibrations are disclosed for a survey grade calibration: () angular calibration, implemented using at least one anti-podal pair of telescopes, () range calibration, implemented using at least one telescope mounted fiber recirculator, and () tilt calibration, implemented using at least one pair of telescopes not mounted in anti-podal configuration and an integral tilt table. Methods for aligning or measuring the mis-alignment between anti-podal telescope pairs are also described.