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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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Related Experiment Video

Updated: May 24, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
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Remote sensor for spatial measurements by using optical scanning.

Oleg Sergiyenko1, Wilmar Hernandez, Vira Tyrsa

  • 1Engineering Institute, Autonomous University of Baja California, Calle de la Normal S/N, col. Insurgentes, Mexicali, Baja California, Mexico.

Sensors (Basel, Switzerland)
|February 21, 2012
PubMed
Summary
This summary is machine-generated.

We developed a low-cost, contact-free optical scanning system for 3-D data acquisition and surface registration. This system offers an affordable alternative to expensive, complex measurement equipment for object recognition.

Keywords:
health monitoringlaserpassive scanningrobot navigation

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Computer Vision

Background:

  • Traditional 3-D measurement systems are often expensive and complex.
  • There is a significant demand for low-cost, accessible measurement solutions.
  • Existing contact-free techniques can be resource-intensive.

Purpose of the Study:

  • To introduce a novel, low-cost passive optical scanning system.
  • To enable efficient 3-D data acquisition and surface parameter registration.
  • To provide practical, affordable solutions for object recognition and surface analysis.

Main Methods:

  • Development of a novel passive optical scanning system.
  • Implementation of contact-free 3-D data acquisition techniques.
  • Digitization of points for fast surface parameter registration.

Main Results:

  • Demonstration of two practical applications of the developed system.
  • Successful low-cost 3-D data acquisition.
  • Efficient surface parameter registration using digitized points.

Conclusions:

  • The proposed passive optical scanning system provides a viable low-cost alternative.
  • The system effectively addresses the need for accessible 3-D measurement solutions.
  • This technology facilitates object surface recognition and 3-D object recognition applications.