Characterization of the OPAL obscurant penetrating LiDAR in various degraded visual environments

Trickey, Evan; Church, P.; Cao, Xiaoying

doi:10.1117/12.2015259

Cited by 23 publications

(13 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A series of evaluations on the OPAL were conducted using the aerosol chamber facility at Defence Research and Development Canada (DRDC) Valcartier in Quebec, Canada [3]. The chamber has a length of 22m.…”

Section: Obscurants' Penetration Resultsmentioning

confidence: 99%

Lidar Architecture for Harsh Environment Applications

Church

2016

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Obscurants' Penetration Resultsmentioning

confidence: 99%

Lidar Architecture for Harsh Environment Applications

Church

2016

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Further, different portions of the FOV are typically scanned at different times using a raster scan. However, other scan patterns are possible, such as a non-overlapping rosette pattern [17] which gives full FOV coverage at coarse resolution and then fills in details. Flash lidar systems provide simultaneous full coverage of the FOV and like passive imaging systems, FOV and resolution are tightly coupled by the fixed focal plane pixel count.…”

Section: Figure 3 Aperture Diameter Versus Wavelength At Various Resmentioning

confidence: 99%

Applications and challenges for MMW and THz sensors

Sanders-Reed

2015

SPIE Proceedings

View full text Add to dashboard Cite

MMW and THz sensors offer unique imaging capabilities and challenges. This paper will provide a brief discussion of illumination, propagation, and resolution in these and adjacent bands, followed by a discussion of some application areas for these sensors, in particular imaging in Degraded Visual Environments (DVE), stand-off screening and chemical detection, and surveillance and monitoring. Comparisons with other sensing modalities will be provided discussing some of the relative strengths and weaknesses of MMW & THz sensing compared to these other modalities.

show abstract

“…Millimeter-wave radar (MMW) can penetrate obscurants well due to their long wavelength but are limited in their spatial resolution capability. LiDAR have shorter penetration depths when compared to MMW radars, but can offer higher spatial resolution sufficient to detect small threats to the aircraft, such as wires, terrain depressions in the landing zone and small size objects lying in the landing zone 3,4,5,6 . A more in-depth characterization of the OPAL sensor was required to determine the expected resolution of small objects detection under conditions of obscurants.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the OPAL LiDAR under controlled obscurant conditions

2016

Self Cite

View full text Add to dashboard Cite

Neptec Technologies' OPAL-120 3D LiDAR is optimized for obscurant penetration. The OPAL-120 uses a scanning mechanism based on the Risley prism pair. The scan patterns are created by rotating two prisms under independent motor control. The geometry and material properties of the prisms define the conical field-of-view of the sensor, which can be built to between 60 to 120 degrees. The OPAL-120 was recently evaluated using a controlled obscurant chamber capable of generating clouds of obscurants over a depth of 22m. Obscurants used in this investigation include: Arizona road dust, water fog, and fog-oil. The obscurant cloud optical densities were monitored with a transmissometer. Optical depths values ranged from an upper value of 6 and progressively decreased to 0. Targets were positioned at the back of the obscurant chamber at a distance of 60m from the LiDAR. The targets are made of a foreground array of equally spaced painted wood stripes in front of a solid background.Reflectivity contrasts were achieved with foreground/background combinations of white/white, white/black and black/white. Data analysis will be presented on the effect of optical densities on range and cross-range resolution, and accuracy. The analysis includes the combinations of all obscurant types and target reflectivity contrasts.

show abstract

Characterization of the OPAL obscurant penetrating LiDAR in various degraded visual environments

Cited by 23 publications

References 3 publications

Lidar Architecture for Harsh Environment Applications

Lidar Architecture for Harsh Environment Applications

Applications and challenges for MMW and THz sensors

Characterization of the OPAL LiDAR under controlled obscurant conditions

Contact Info

Product

Resources

About