Andrew T Griffis

US Patent:

7652752, Jan 26, 2010

Filed:

Jul 14, 2005

Appl. No.:

11/181665

Inventors:

Gregory J. Fetzer - Tucson AZ, US
Douglas Gugler - Tucson AZ, US
William L. Ryder - Tucson AZ, US
Andrew J. Griffis - Tucson AZ, US
David Miller - Tucson AZ, US
Asher Gelbart - Tucson AZ, US

Assignee:

Arete' Associates - Northridge CA

International Classification:

G01C 3/08

US Classification:

356 401, 356 301, 356 31, 356 501, 356 51

Abstract:

Pushbroom and flash lidar operations outside the visible spectrum, most preferably in near-IR but also in IR and UV, are enabled by inserting—ahead of a generally conventional lidar receiver front end—a device that receives light scattered from objects and in response forms corresponding light of a different wavelength from the scattered light. Detailed implementations using arrays of discrete COTS components—most preferably PIN diodes and VCSELs, with intervening semicustom amplifiers—are discussed, as is use of a known monolithic converter. Differential and ratioing multispectral measurements, particularly including UV data, are enabled through either spatial-sharing (e. g. plural-slit) or time-sharing.

US Patent:

7830442, Nov 9, 2010

Filed:

Apr 29, 2003

Appl. No.:

10/426907

Inventors:

Andrew Griffis - Tucson AZ, US
Gregory Fetzer - Tucson AZ, US
Brian Redman - Silver Spring MD, US
David Sitter - Torrance CA, US
Asher Gelbart - Tucson AZ, US

Assignee:

Areté Associates - Northridge CA

International Classification:

H04N 5/225

US Classification:

348340, 34823199

Abstract:

A lidar pulse is time resolved in ways that avoid costly, fragile, bulky, high-voltage vacuum devices—and also costly, awkward optical remappers or pushbroom layouts—to provide preferably 3D volumetric imaging from a single pulse, or full-3D volumetric movies. Delay lines or programmed circuits generate time-resolution sweep signals, ideally digital. Preferably, discrete 2D photodiode and transimpedance-amplifier arrays replace a continuous 1D streak-tube cathode. For each pixel a memory-element array forms range bins. An intermediate optical buffer with low, well-controlled capacitance avoids corruption of input signal by these memories.

US Patent:

20020067845, Jun 6, 2002

Filed:

Dec 4, 2001

Appl. No.:

10/005028

Inventors:

Andrew Griffis - Tucson AZ, US

International Classification:

G06K009/00

US Classification:

382/107000

Abstract:

A sensing device and method for use in imaging surface features of an object is provided. A surface along which an object can slide in a predetermined direction includes an array of contact sense elements configured to form a single array oriented transverse to the predetermined direction and at least one additional contact sense element located in spaced relation to the single array in a manner that enables a velocity measurement of the object in the predetermined direction. A scanning device is configured to provide a periodic scan of the array of contact sense elements, and a processor in circuit communication with the scanning device is configured to receive data from the scanning device and to produce image and velocity data related to the object. Preferably, the contact sense elements are electrically conductive elements disposed on a ceramic or polymeric substrate, using printed circuit board construction. A technique is described that enables the reconstruction of an object from such a device

US Patent:

20070090180, Apr 26, 2007

Filed:

Apr 8, 2004

Appl. No.:

10/820906

Inventors:

Andrew Griffis - Tucson AZ, US
Roger Karl Undhagen - Tucson AZ, US
Tinku Acharya - Chandler AZ, US

International Classification:

G06F 7/00
G06F 17/00
G06K 7/00

US Classification:

235376000, 235435000, 235375000

Abstract:

A system for use in managing activity of interest within an enterprise is provided. The system comprises a computer configured to (i) receive sensor data that is related to key activity to the enterprise, such key activity comprising a type of object and the object's activity at a predetermined location associated with the enterprise, the sensor providing information from which an object's type and activity at the predetermined location can be derived, (ii) process the sensor data to produce output that is related to key activity to the enterprise, and (ii) store the information extracted from the processed data in a suitable manner for knowledge extraction and future analysis. According to a preferred embodiment, the object is human, machine or vehicular, and the computer is further configured to correlate sensor data to key activity to the enterprise and the output includes feedback data based on the correlation.

US Patent:

20110255072, Oct 20, 2011

Filed:

Feb 3, 2011

Appl. No.:

12/927210

Inventors:

Andrew Griffis - Tucson AZ, US
Gregory Fetzer - Tucson AZ, US
Brian Redman - Silver Spring MD, US
David Sitter - Torrance CA, US
Asher Gelbart - Tucson AZ, US

Assignee:

Aret? Associates - Northridge CA

International Classification:

G01C 3/08
G01B 11/24

US Classification:

356 501, 356601

Abstract:

A lidar pulse is time resolved in ways that avoid costly, fragile, bulky, high-voltage vacuum devices—and also costly, awkward optical remappers or pushbroom layouts—to provide preferably 3D volumetric imaging from a single pulse, or full-3D volumetric movies. Delay lines or programmed circuits generate time-resolution sweep signals, ideally digital. Preferably, discrete 2D photodiode and transimpedance-amplifier arrays replace a continuous 1D streak-tube cathode. For each pixel a memory-element array forms range bins. An intermediate optical buffer with low, well-controlled capacitance avoids corruption of input signal by these memories.

US Patent:

20210258543, Aug 19, 2021

Filed:

Apr 21, 2021

Appl. No.:

17/237032

Inventors:

- Tucson AZ, US
Andrew Griffis - Tucson AZ, US

International Classification:

H04N 7/18
H04N 5/225
H04N 5/232
H04N 5/247
H04N 5/38
H04N 5/265
G08B 13/196
G01S 19/01
G01J 5/00
G01R 31/12

Abstract:

Systems and methods are provided for measuring, assessing, predicting, improving and presenting the state of physical object and human core temperatures, using imaging devices, e.g., a thermal infrared camera, and/or intruders in a region of interest to an operator, such that little or no operator effort is required to install, use or receive reports from the system. The invention also includes, for example, means and methods for exploiting autonomous operation and configuration, placement at remote sites, enhancement of image resolution and estimation of range such that accuracy of results and autonomy of operation is enhanced.

US Patent:

20200250944, Aug 6, 2020

Filed:

Feb 2, 2020

Appl. No.:

16/779622

Inventors:

- Tucson AZ, US
Andrew Griffis - Tucson AZ, US

International Classification:

G08B 13/19
G08B 13/196
H04N 5/232
G06K 9/20
G06K 9/32

Abstract:

Systems and methods are provided for measuring, assessing, predicting, improving and presenting the state of physical object temperatures using imaging devices, e.g., a thermal infrared camera, and/or intruders in a region of interest to an operator, such that little or no operator effort is required to install, use or receive reports from the system. The invention also includes, for example, means and methods for exploiting autonomous operation and configuration, placement at remote sites, enhancement of image resolution and estimation of range such that accuracy of results and autonomy of operation is enhanced.