James A Howell

US Patent:

7248755, Jul 24, 2007

Filed:

Mar 31, 2004

Appl. No.:

10/543288

Inventors:

Andrew D Sappey - Lakewood CO, US
James Howell - Louisville CO, US
Henrick Hofvander - Boulder CO, US
Bernard Patrick Masterson - Louisville CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G02B 6/00

US Classification:

385 13, 385 12

Abstract:

A sensing apparatus consisting of more than one diode laser having select lasing frequencies, a multiplexer optically coupled to the outputs of the diode lasers with the multiplexer being further optically coupled to a pitch side optical fiber. Multiplexed laser light is transmitted through the pitch side optical fiber to a pitch optic operatively associated with a process chamber which may be a combustion chamber or the boiler of a coal or gas fired power plant. The pitch optic is oriented to project multiplexed laser output through the process chamber. Also operatively oriented with the process chamber is a catch optic in optical communication with the pitch optic to receive the multiplexed laser output projected through the process chamber. The catch optic is optically coupled to an optical fiber which transmits the multiplexed laser output to a demultiplexer. The demultiplexer demultiplexes the laser light and optically couples the select lasing frequencies of light to a detector with the detector being sensitive to one of the select lasing frequencies.

US Patent:

7389027, Jun 17, 2008

Filed:

Jul 24, 2007

Appl. No.:

11/782481

Inventors:

Andrew D. Sappey - Lakewood CO, US
James Howell - Louisville CO, US
Henrik Hofvander - Boulder CO, US
Bernard Patrick Masterson - Boulder CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G02B 6/26

US Classification:

385 39, 385 15

Abstract:

A pitch side optical system for use in diode laser spectroscopy consisting of more than one diode laser having select lasing frequencies with each diode laser being coupled to an end of a distinct input optical fiber. The pitch side optical system further consists of a multiplexer optically coupled to the other end of less than all of the input optical fibers with the multiplexer outputting multiplexed laser light to a pitch side optical fiber. The pitch side optical system further consists of a coupler optically coupled to the far end of the pitch side optical fiber and the far end of an unmultiplexed input optical fiber with the coupler combining the multiplexed laser light and the unmultiplexed laser light and outputting the combined light to a transmission optical fiber. Typically, the coupler is located near the combustion process. The pitch side optical system further consists of a pitch optic coupled to the transmission optical fiber.

US Patent:

7469092, Dec 23, 2008

Filed:

Jul 24, 2007

Appl. No.:

11/782492

Inventors:

Andrew D. Sappey - Lakewood CO, US
James Howell - Louisville CO, US
Henrik Hofvander - Boulder CO, US
Bernard Patrick Masterson - Boulder CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G02B 6/00

US Classification:

385147, 385 52

Abstract:

A diode laser spectroscopy gas sensing apparatus having a diode laser with a select lasing frequency, a pitch optic coupled to the diode laser with the pitch optic being operatively associated with a process chamber and oriented to project laser light along a projection beam through the process chamber. This embodiment additionally includes a catch optic in optical communication with the pitch optic to receive the laser light projected through the process chamber and an optical fiber optically coupled to the catch optic. In addition, the catch optic is operatively associated with a catch side alignment mechanism which provides for the alignment of the catch optic with respect to the projection beam to increase a quantity of laser light received by the catch optic from the pitch optic and coupled to the optical fiber and a detector sensitive to the select lasing frequency optically coupled to the optical fiber. The catch side alignment mechanism may consist of means to tilt the catch optic along a first axis and a second axis orthogonal to the first axis with both the first and second axes being approximately orthogonal to the projection beam.

US Patent:

7729566, Jun 1, 2010

Filed:

Jul 24, 2007

Appl. No.:

11/782475

Inventors:

Andrew D. Sappey - Lakewood CO, US
James Howell - Louisville CO, US
Henrik Hofvander - Boulder CO, US
Bernard Patrick Masterson - Boulder CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G02B 6/00

US Classification:

385 13, 356 51, 356 73, 385 37

Abstract:

A method of sensing a process utilizing a sensing apparatus consisting of more than one diode laser having select lasing frequencies, a multiplexer optically coupled to the outputs of the diode lasers with the multiplexer being further optically coupled to a pitch side optical fiber. Multiplexed laser light is transmitted through the pitch side optical fiber to a pitch optic operatively associated with a process chamber which may be a combustion chamber or the boiler of a coal or gas fired power plant. The pitch optic is oriented to project multiplexed laser output through the process chamber. Also operatively oriented with the process chamber is a catch optic in optical communication with the pitch optic to receive the multiplexed laser output projected through the process chamber. The catch optic is optically coupled to an optical fiber which transmits the multiplexed laser output to a demultiplexer. The demultiplexer demultiplexes the laser light and optically couples the select lasing frequencies of light to a detector with the detector being sensitive to one of the select lasing frequencies.

US Patent:

7787123, Aug 31, 2010

Filed:

Oct 4, 2006

Appl. No.:

12/067789

Inventors:

James Howell - Louisville CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G01N 21/39

US Classification:

356437, 356 51, 25033913, 250343

Abstract:

A method of calibrating an absorption spectroscopy measurement wherein the calibration method includes projecting laser light through a sample of a first quantity of a gas of interest and a second irrelevant quantity of a spectroscopically identical or similar gas (). The first and second spectroscopic absorptions of the laser light are measured over specific first and second absorption lines. A functional relationship is determined between the first and second measured spectroscopic absorptions and two unknown variables. The function relationships may then be simultaneously solved to determine one or both unknown variables and thereby obtain a measurement relating to the first quantity of the gas of interest, calibrated for the second irrelevant quantity of gas.

US Patent:

8255169, Aug 28, 2012

Filed:

May 23, 2008

Appl. No.:

12/600034

Inventors:

Henrik Hofvander - Boulder CO, US
Andrew D. Sappey - Lakewood CO, US
James Howell - Louisville CO, US
Qingchun Zhao - Longmont CO, US

Assignee:

Zolo Technologies, Inc. - Boulder CO

International Classification:

G01N 31/00
G01R 13/00

US Classification:

702 24, 702 66, 702189, 702190

Abstract:

A method of absorption spectroscopy including obtaining absorption data at multiple wavelengths along more than one line-of-sight path through a quantity of gas of interest. The method further includes identifying more than one temperature and gas species concentration bin along the multiple line-of-sight paths and creating a map of temperature and gas species concentration. The map thus created will have at least two-dimensional information derived from select temperature and gas species concentration bins identified along more than one line-of-sight path. Apparatus for implementing the above method is also disclosed.

US Patent:

20020083237, Jun 27, 2002

Filed:

Dec 22, 2000

Appl. No.:

09/746313

Inventors:

James Howell - Georgetown TX, US
James Leftwich - Austin TX, US

International Classification:

G06F013/00

US Classification:

710/062000

Abstract:

The present invention incorporates a silicon based isolation device into a portable computer. An additional silicon based isolation device is also incorporated into a docking station for a personal computer. Either or both of the isolation components may be programmable. The invention also teaches a silicon based isolation device for use with a modem. Again, the silicon based isolation devices may be programmable. An embodiment of the invention teaches a circuit (or other means) to detect docking of the computer in a docking station.

US Patent:

20030208361, Nov 6, 2003

Filed:

May 2, 2002

Appl. No.:

10/137623

Inventors:

Daryl Belinne - Austin TX, US
Shree Dandekar - Austin TX, US
James Howell - Georgetown TX, US
Shannon Boesch - Austin TX, US

International Classification:

G06F017/60

US Classification:

705/001000

Abstract:

The invention relates to an on-line store which allows a customer to order services of other providers while maintaining a consistent customer experience and control over the customer. Additionally, the invention relates to a system for enabling configuration of an information handling system which includes a configurator, a checkout module, a service activation module, and a database. The configurator configures the system with options selected according to user input. Payment options, obtaining payment and delivery information are presented by the checkout module. The service activation module enables a user to activate a service and a database receives and supplies information to the configurator, the checkout module and the service activation module. The invention also relates to a method of enabling configuration of an information handling system which includes configuring a system with options selected according to user input, presenting payment options and obtaining payment and delivery information during the checkout process, enabling a user to activate a service; and using information derived during the configuring for the enabling. The invention further relates to an on-line store for enabling configuration of an information handling system which includes configuring a system with options selected according to user input, presenting payment options and obtaining payment and delivery information, enabling a user to activate a service; and a database. The database receives and supplies information from and to the configurator, the checkout module and the service activation module.