Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1992-04-23
1993-10-05
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250339, G01N 2135
Patent
active
052508102
ABSTRACT:
A DIAL LIDAR system, and methods of operating same are disclosed. A plurality, such as six, distinct coherent beams are combined into a single transmitted beam. Atmospheric targets, such as light hydrocarbons cause a portion of the transmitted beam to be reflected as a return. In one transmitting configuration, six pulsed beams are fully time-multiplexed, and are combined through selective polarization. In another transmitting configuration, six pulsed beams are fully time-multiplexed, and are combined through selective orientation of beam paths, in connection with a rotating beam displacer. In yet another transmitting configuration, six beams are wavelength-multiplexed, and are combined through differential refraction. In one receiving configuration, time-multiplexed beams are received using a single detector. In another receiving configuration, wavelength-multiplexed beams are received using multiple detectors. In a coherent LIDAR configuration, the outputs of a plurality of coherent sources are modulated, and combined according to any of the aforementioned transmitting configurations. A portion of the source outputs is directed to a receiver section of the system, where it is used to demodulate the LIDAR return.
REFERENCES:
patent: 3766380 (1973-10-01), Menzies
patent: 3953792 (1976-04-01), Fletcher et al.
patent: 4143338 (1979-03-01), Godard et al.
patent: 4394573 (1983-07-01), Correa et al.
patent: 4397549 (1983-08-01), Morgan
patent: 4426640 (1984-01-01), Becconsall et al.
patent: 4434364 (1984-02-01), Correa et al.
patent: 4450356 (1984-05-01), Murray et al.
patent: 4489239 (1984-12-01), Grant et al.
patent: 4490043 (1984-12-01), Cramp
patent: 4687337 (1987-08-01), Stewart et al.
patent: 4696012 (1987-09-01), Harshaw
patent: 4820914 (1989-04-01), Allen
Baumgartner et al., "Continuously Tunable IR Lidar with Applications to Remote Measurements of SO.sub.2 and CH.sub.4 ", Applied Optics, 17 (22), pp. 3555-3561, Nov. 1978.
Browell et al., "Airbourne Differential Absorption Lidar System for Water Vapor Investigations", Optical Engineering, 20 (1), Jan./Feb. 1981, pp. 84-90.
Reid et al., "High Sensitivity Pollution Detection Employing Tunable Diode Lasers", Applied Optics, 17 (2), Jan. 1978, pp. 300-307.
Fields Carolyn E.
Lasen, Inc.
LandOfFree
Mid-infrared light hydrocarbon dial lidar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mid-infrared light hydrocarbon dial lidar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid-infrared light hydrocarbon dial lidar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1006484