Three-dimensional echo light field analysis for dual-band laser active detection of a cat-eye optical system

Article Multidisciplinary Sciences

Real-time quality control of dripping pill's weight based on laser detection technology

Xiaoping Wang et al.

Summary: This study reports the development of a process analytical technology (PAT)-based real-time feedback control system for maintaining the weight of Ginkgo biloba leaf dripping pills during manufacturing. A proportional-integral controller was used to adjust the opening degree of the drop valve and ensure a predefined weight of the pills. The closed-loop feedback control system showed excellent robustness, high accuracy, and high efficiency in compensating for disturbances and maintaining the desired weight of the pills. It also improved the process capability of the dripping process with a capability index of >1.67.

SCIENTIFIC REPORTS (2023)

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Article Optics

Three-dimensional echo distribution analysis of multi-band and oblique Gaussian beams propagating through cat-eye optical system

Zhe Lv et al.

Summary: This study proposes a three-dimensional echo distribution calculation model of an obliquely incident multi-band laser and analyzes the influences of laser wavelength, incident angle, and target detector parameter on the echo distribution. The results show that the peak light intensity decreases with an increase in laser wavelength and that the target-missing quantity of the echo spot centroid is positively correlated with the incident angle. This model can effectively extract important information from the cat-eye target echo and provide a trajectory prediction theory for the active detection of a cat-eye target moving at high speed.

OPTICS AND LASER TECHNOLOGY (2022)

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Article Optics

Bandwidth limits of luminescent solar concentrators as detectors in free-space optical communication systems

Mark Portnoi et al.

Summary: Modeling the bandwidth limits of Luminescent Solar Concentrators (LSCs) offers vital insights into their behavior and provides a technique for evaluating their use in various applications. Although LSCs have emerged as a promising receiver technology in free-space optical communications due to their ability to collect light from a wide field-of-view and concentrate it into small areas, the comparably slow timescale of their fluorescence events may pose a bottleneck on the bandwidth of high-speed communication systems. A team of researchers led by Ioannis Papakonstantinou from University College London has developed a technique that delineates the fundamental limits of LSCs as optical detectors and demonstrated time-domain Monte-Carlo simulation for optimizing LSC based receiver systems. The work opens the door for the use of LSCs in applications in visible light communications, high-speed video recording, and real-time biological imaging.

LIGHT-SCIENCE & APPLICATIONS (2021)

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Article Optics