Paul Abram Lang

US Patent:

57398470, Apr 14, 1998

Filed:

Mar 20, 1995

Appl. No.:

8/406423

Inventors:

Charles J. Tranchita - Glen Ellyn IL
Paul D. Lang - Palatine IL
Ronald B. Jones - Hoffman Estates IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04N 718

US Classification:

348143

Abstract:

Infrared radiation from a light source such as a laser diode illuminates the field of view of a surveillance camera. The amount of illumination is varied in intervals, which may for example, be about 3/4 of a second, by varying the power applied to the light source. The radiation may emanate from optical fibers surrounding a camera lens, or through other ports. The power to the laser diode may be altered in response to background light sensed by a photo cell.

US Patent:

51537710, Oct 6, 1992

Filed:

Jul 18, 1990

Appl. No.:

7/556789

Inventors:

Charles A. Link - Palatine IL
Paul D. Lang - Palatine IL

Assignee:

Northrop Corporation - Los Angeles CA

International Classification:

G02F 111
G02B 2600
G02B 2700
H01S 3117

US Classification:

359286

Abstract:

A acousto-optic Fabry-Perot optical modulator (10) has a crystalline body (12) having a first partially reflective electrode (14) for receiving radiation, including laser radiation having a wavelength or wavelengths of interest, and a second, oppositely disposed partially reflective electrode (14) for emitting the received radiation including the laser radiation. The modulator is driven by an alternating source (16) at a resonant frequency of the crystalline body and intensity modulates at the resonant frequency only the emitted laser radiation. A detector (18) is positioned for receiving the emitted radiation, including the intensity modulated laser radiation, and has an output signal expressive of the intensity of the emitted radiation. Signal processing circuitry (20,34) is coupled to the detector output signal and is responsive thereto for identifying the intensity modulated laser radiation for indicating when laser radiation is received by the modulator.

US Patent:

59737301, Oct 26, 1999

Filed:

Aug 26, 1997

Appl. No.:

8/918362

Inventors:

Charles J. Tranchita - Glen Ellyn IL
Paul D. Lang - Palatine IL
Ronald B. Jones - Hoffman Estates IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04N 718

US Classification:

348143

Abstract:

Infrared radiation from a light source such as a laser diode illuminates the field of view of a surveillance camera. The amount of illumination is varied in intervals, which may for example, be about 3/4 of a second, by varying the power applied to the light source. The radiation may emanate from optical fibers surrounding a camera lens, or through other ports. The power to the laser diode may be altered in response to background light sensed by a photo cell. A filter on the camera preferentially passes reflected illumination of the source while alternating background illumination.

Address:

5916 S Michigan Ave, Chicago, IL 60637

VIN:

1GYFK23229R257774

Make:

CADILLAC

Model:

ESCALADE

Year:

2009