Charles D Hanson

Author:

Charles Goring Hanson

ISBN #:

0255362080

Author:

Charles Goring Hanson

ISBN #:

0255360495

Author:

Charles Goring Hanson

ISBN #:

0312144911

Author:

Charles P. Hanson

ISBN #:

0813917948

Author:

Charles Hanson

ISBN #:

0333531868

Author:

Charles Hanson

ISBN #:

0333559029

Author:

Charles Hanson

ISBN #:

0893902322

US Patent:

6361825, Mar 26, 2002

Filed:

Aug 20, 1996

Appl. No.:

08/699960

Inventors:

Howard R. Beratan - Richardson TX
Charles M. Hanson - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

C23C 1640

US Classification:

4271261, 427162, 4273762, 42725531, 42725535, 42725536

Abstract:

A pyroelectric detector system, the pyroelectric detector element therefor and the method of making the detector element which comprises an integrated circuit ( ) and a pyroelectric detector element ( ) coupled to the integrated circuit and thermally isolated from the integrated circuit. The element includes a lead-containing pyroelectric layer having a pair of opposing surfaces and having a thickness to provide a resonant cavity for radiations in a predetermined frequency range. A bottom electrode ( ) opaque to radiations in the predetermined frequency range is secured to one of the pair of opposing surfaces and a top electrode ( ) is secured to the other of the pair of opposing surfaces which is semi-transparent to radiations in the predetermined frequency range. The top electrode is taken from the group consisting of platinum and nichrome. The lead-containing pyroelectric layer is preferably lead titanate.

US Patent:

6777681, Aug 17, 2004

Filed:

Apr 25, 2001

Appl. No.:

09/844171

Inventors:

Thomas R. Schimert - Ovilla TX
Howard R. Beratan - Richardson TX
Charles M. Hanson - Dallas TX
Kevin L. Soch - Nevada City CA
John H. Tregilgas - Richardson TX

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01J 502

US Classification:

2503384, 250330, 250332, 2503381

Abstract:

An infrared detector ( ) includes a substrate ( ) having thereon an array of detector elements ( ). Each detector element has a membrane ( ), which includes an amorphous silicon layer ( ) in contact with at least two electrodes ( ) that are made of a titanium/aluminum alloy which absorbs infrared radiation. In order to obtain a desired temperature coefficient of resistance (TCR), the amorphous silicon layer may optionally be doped. The effective resistance between the electrodes is set to a desired value by appropriate configuration of the electrodes and the amorphous silicon layer. The membrane includes two outer layers ( ) made of an insulating material. Openings ( ) may optionally be provided through the membrane.

US Patent:

6802987, Oct 12, 2004

Filed:

Oct 21, 1999

Appl. No.:

09/422380

Inventors:

K R Udayakumar - Dallas TX
Howard R. Beratan - Richardson TX
Charles M. Hanson - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

C04B 35465

US Classification:

252 629R, 501136

Abstract:

Ferroelectric materials useful in monolithic uncooled infrared imaging use Ca and Sn substitutions in PbTiO3 and also have alternatives with dopants such as Dy, Ho, Bi, Ce, and Fe. The ferroelectrics may also be used in non-volatile integrated circuit memories.

US Patent:

7122788, Oct 17, 2006

Filed:

Oct 8, 2004

Appl. No.:

10/961975

Inventors:

Robert A. Owen - Rowlett TX, US
Vicki D. Paul - McKinney TX, US
Humphrey W. Ha - Plano TX, US
Roger C. Knott - Plano TX, US
Mark A. Gohlke - Plano TX, US
Charles M. Hanson - Richardson TX, US

Assignee:

L-3 Communications Corporation - New York NY

International Classification:

G01D 18/00

US Classification:

2502521

Abstract:

Collecting samples to adjust a signal includes providing a shutter in an opened position to allow a detector of an infrared camera to detect infrared radiation and generate a signal corresponding to the infrared radiation. A first touchup iteration is initiated by moving the shutter to a closed position, and samples of a reference frame are collected according to a collection instruction. The shutter is then moved to the opened position. If there is a change in a state of the infrared camera, the collection instruction is adjusted in response to the change. A second touchup iteration is initiated by moving the shutter to the closed position, and samples are collected according to the adjusted collection instruction. A modification of the signal is determined in accordance with at least some of the samples.

US Patent:

8183513, May 22, 2012

Filed:

Jun 26, 2009

Appl. No.:

12/459122

Inventors:

Charles M. Hanson - Richardson TX, US
Stephen D. Gaalema - Colorado Springs CO, US

Assignee:

L-3 Communications Corporatin - New York NY

International Classification:

H01J 40/14
G01J 5/00

US Classification:

250214R, 2503381

Abstract:

Read-out cell systems are disclosed for image detectors, including infrared image detectors, that provide improved sensitivity by providing in-cell subtraction through the use of a voltage ramp signal generated using a reference pixel and a feedback amplifier. The ramp voltage is generated using a reference pixel and an amplifier having feedback. The ramp voltage is then provided to a plurality of read-out cells. The ramp voltage can be coupled to an input transistor to provide current subtraction prior to the integration node. The ramp voltage can also be provided to integration capacitors within the read-out cells to provide current subtraction directly to the integration node. Further, a temperature-independent fixed current source can also be utilized to further control current subtraction.

US Patent:

8546757, Oct 1, 2013

Filed:

Apr 28, 2010

Appl. No.:

12/799627

Inventors:

Charles M. Hanson - Richardson TX, US

Assignee:

L-3 Communications Corporation - New York NY

International Classification:

G01J 5/20

US Classification:

2503384, 2503381

Abstract:

Microbolometer pixel structures including membrane material in a current path between at least two spaced electrodes, the membrane material having multiple openings defined in the current path that are configured such that substantially the entire volume of electrically conductive membrane material in at least a portion of the current path contributes to conduction of current between the electrical contacts.

US Patent:

50086570, Apr 16, 1991

Filed:

Jan 31, 1989

Appl. No.:

7/304166

Inventors:

Charles M Hanson - Richardson TX
Virginia N. MacDonald - Lansdale PA

Assignee:

Varo, Inc. - Garland TX

International Classification:

G09G 320

US Classification:

340766

Abstract:

A video display (38) provides a visual representation of a video signal over a matrix of pixels (40). Each pixel comprises a picture element (64) operable to radiate responsive to an externally applied voltage determined by the video signal. To prevent the intensity of a selected picture element (64) from being dependent upon the threshold potentials of the switching elements connecting the externally applied voltage to the picture elements (64), feedback lines (46) are provided to sense the voltage at the picture element (64). The voltage at the picture element (64) is adjusted until it equals the desired voltage.

US Patent:

54866987, Jan 23, 1996

Filed:

Apr 19, 1994

Appl. No.:

8/229497

Inventors:

Charles M. Hanson - Richardson TX
Dana Dudley - Dallas TX
James E. Robinson - Dallas TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G01J 510

US Classification:

250332

Abstract:

A thermal imaging system (10) contains a focal plane array (14) including a plurality of thermal sensors (50) mounted on a substrate (52). The focal plane array (14) generates both a reference signal which represents the temperature of the substrate (52) and a biased signal corresponding to the total radiance emitted by a scene (11). Electronics (16) process the reference signal and the biased signal to obtain an unbiased signal representing radiance differences emitted by objects in the scene (11). A thermoelectric cooler/heater (38) may be provided to optimally adjust the temperature of the substrate (52) to improve overall image quality. Each thermal sensor (50) contains an electrode (66 and 68) that electrically couples the thermal sensor (50) to the substrate (52) and also allows the thermal sensor (50) to deflect, contact, and thermally shunt with the substrate (52).