Risley prism scan-based approach to standoff trace explosive detection

Schwarze, Craig R.; Schundler, Elizabeth; Vaillancourt, Robert; Newbry, Scott P.; Benedict-Gill, Ryan

doi:10.1117/1.oe.53.2.021110

Cited by 10 publications

(1 citation statement)

References 15 publications

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“…The low-cost scanner system introduced in (Liu et al, 2022) uses a hybrid approach with six laser beams from pulsed laser diodes, which are deflected by a so-called Risley prism (Schwarze et al, 2013). The backscattered signal components are detected by associated APD receivers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Consumer-Grade and Survey-Grade Uav-Lidar

Mandlburger,

Kölle,

Pöppl

et al. 2023

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Driven by developments in the automotive industry, the availability of compact consumer-grade LiDAR (Light Detection and Ranging) sensors has increased significantly in recent years. Some of these sensors are also suitable for UAV-based surveying tasks. This paper first discusses the differences between consumer-grade and survey-grade LiDAR systems. Special attention will be paid to the scanning mechanisms used on the one hand and to different solutions for the transceiver units on the other hand. Based on the technical data of two concrete systems, the consumer-grade DJI Zenmuse L1 sensor and the survey-grade scanner RIEGL VUX-1UAV, the expected effects of the sensor parameters on the 3D point cloud are first discussed theoretically and then verified using an exemplary data set in Hessigheim (Baden-Württemberg, Germany). The analysis shows the possibilities and limitations of consumer-grade LiDAR. Compared to the low-cost sensor, the high-end scanner exhibits lower range measurement noise (5–10 mm) and better 3D point location accuracy. Furthermore, the higher laser beam quality of high-end devices (beam divergence, beam shape) enables more detailed object detection at the same point density. With moderate accuracy requirements of 5–10 cm, however, applications in the geodetic-cartographic context also arise for the considerably less expensive consumer-grade LiDAR systems.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Consumer-Grade and Survey-Grade Uav-Lidar

Mandlburger,

Kölle,

Pöppl

et al. 2023

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Double-wedge prism imaging tracking device based on the adaptive boresight adjustment principle

Zhong

Liu

et al. 2019

Review of Scientific Instruments

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A double-wedge prism device has been used in various imaging detection applications due to its high precision and strong anti-disturbance capability. In this paper, a self-adaptation double-wedge prism boresight adjustment principle suitable for both far-field and near-field target tracking is proposed. In order to realize this application, an adaptive variable boresight imaging tracking device is designed specifically. Then a tracking error model is established, and dynamic simulation, error evaluation, and sensitivity analysis are carried out according to the design objective. The experimental results show that the pitch angle deviation and azimuth angle deviation of the device are less than 6′, and the blind zone can be eliminated by adding a third wedge prism, thus achieving high-precision boresight adjustment and tracking.

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