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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

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Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor IRIS
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Remote Reflectivity Sensor for Industrial Applications.

Federico Cavedo1, Parisa Esmaili1, Michele Norgia1

  • 1Department of Electronics, Information and Bioengineering Politecnico di Milano, 20133 Milan, Italy.

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|March 6, 2021
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Summary
This summary is machine-generated.

This study introduces a low-cost optical reflectivity sensor for detecting objects and surface variations up to 20m. Its robust design ensures accurate measurements resistant to ambient light, offering a cost-effective sensing solution.

Keywords:
digital baseline restorerdistance measurementlaser sensorsobject recognitionreflectivity measurementremote encoder

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Area of Science:

  • Optoelectronics
  • Sensing Technology

Background:

  • Traditional sensors may lack cost-effectiveness or range for certain applications.
  • Variations in surface optical properties require precise detection methods.

Purpose of the Study:

  • To develop and present a low-cost optical reflectivity sensor.
  • To enable object detection and surface property variation measurement up to 20 meters.
  • To enhance interference immunity for reliable performance.

Main Methods:

  • Utilizing a pulsed collimated laser beam (10 kHz) and a synchronous digital detector.
  • Employing a 1-inch biconvex lens for back-diffused light collection.
  • Implementing a double-side digital baseline restorer algorithm for amplitude detection.

Main Results:

  • The sensor demonstrates robustness against ambient light.
  • It exhibits strong sensitivity across a wide reflection range.
  • Experimental evaluation confirmed its capability for object detection and recognition.

Conclusions:

  • The proposed sensor offers a cost-effective solution for punctual surface reflection measurements at various distances.
  • Its design provides reliable performance in diverse environmental conditions.
  • The sensor is suitable for applications like remote encoders and keyphasors.