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Light Acquisition

Light Acquisition

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Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform

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Wide-Field-of-View Multispectral Camera Design for Continuous Turfgrass Monitoring.

Lien Smeesters¹, Jef Verbaenen¹, Luca Schifano¹

¹Brussels Photonics (B-PHOT) and Flanders Make, Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.

Sensors (Basel, Switzerland)

|March 11, 2023

Summary

A new five-channel multispectral camera enables autonomous turfgrass monitoring. This wide-field-of-view system integrates into lighting fixtures, reducing chemical use and optimizing resource management in agriculture.

Keywords:

camera design demonstrator setup modulation transfer function multispectral camera thermal imaging turfgrass monitoring vegetation indices wide field of view

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Area of Science:

Agricultural technology
Optical engineering
Remote sensing

Background:

Sustainable agriculture requires efficient resource management and reduced chemical inputs.
Current drone-based crop monitoring offers accuracy but needs technical operators.
Autonomous and continuous monitoring systems are needed for advanced turfgrass management.

Purpose of the Study:

To develop a novel five-channel multispectral camera for autonomous crop monitoring.
To design a wide-field-of-view imaging system for broad coverage.
To enable sensing of multiple vegetation indices using visible, near-infrared, and thermal bands.

Main Methods:

Designed a five-channel multispectral camera with a field of view exceeding 164°.
Integrated the camera design for potential use within lighting fixtures.
Optimized design parameters and developed a demonstrator setup for optical characterization.

Main Results:

Achieved excellent image quality across all five channels.
Demonstrated Modulation Transfer Function (MTF) exceeding 0.5 at 72 lp/mm for visible/near-infrared channels.
Achieved MTF exceeding 27 lp/mm for the thermal channel.

Conclusions:

The developed five-channel wide-field-of-view camera design facilitates autonomous crop monitoring.
This technology supports optimized resource usage and reduced chemical application in agriculture.
The system paves the way for continuous, automated vegetation analysis.