Laser Measurement Systems

Holders: Assoc. Prof. Jezeršek Matija

Subject description

Prerequisites:

The execution of study obligations is defined in the Rules on testing and grading the knowledge of students at UL FS.

In order to pass and successfully execute the study obligations and participate in study work, the students are advised to regularly attend the lectures and exercises (at least 80 % presence), to prepare adequately for laboratory exercises and actively participate at the exercises. The condition for admission to exam is a passing grade for the exercises.

The necessary pre-knowledge for successful studies are:

  • Physics (geometry optics, wave optics)
  • Basic principles of lasers
  • Optical sensors (photodetectors, cameras)
  • Mechatronics
  • Computer programming

Content (Syllabus outline):

Introduction and an overview of laser measurement methods:

  • The position in a wider field of measurement systems,
  • the properties of laser measurement systems in general.

Building blocks of laser measurement systems:

  • Measurement laser sources,
  • optomechatronic components,
  • some other light sources.

Laser distance measurement based on the light’s time of flight principle:

  • The techniques for measuring the light’s time of flight,

Interferometry:

  • Interferometer types,

Laser measurement of speed and velocity:

  • The techniques for measuring the light’s time of flight,

Fiber sensors:

  • Transmission of light along optical fiber,
  • types of fiber sensors,

Digital image processing:

  • Introduction to the digital representation of images,
  • operations on images
    • histogram,
    • light adjustment,
    • filtering,
    • transformations,
    • detecting edges,
    • contours and other features,
    • tracking changes,
    • optic flow,
  • camera calibration
    • lens distortion,
    • perspective transformation,
  • computer vision.

Laser triangulation:

  • The principle of laser triangulation,
  • different triangulation methods,

Moiré technique:

  • Introduction – the Moiré pattern,
  • types of Moiré measurement techniques,

Some other laser measurement methods:

  • Holography,
  • methods based on laser spots,
  • measuring the surface roughness,

confocal microscopy.

Objectives and competences:

In scope of the Laser measurement systems course, the students will:

  • become aware of the significance of measurement technology,
  • earn the ability to select suitable measurement systems in the working process,
  • develop a perception about the continuous improvement of manufacturing and diagnostic processes.

The students will earn the following subject-specific competences:

  • knowing the fundamental principles of laser measurement technology,
  • knowing the characteristics, advantages and limitations of individual laser measurement methods,
  • knowing the applications of laser measurement systems,
  • practical knowledge in the field of development of laser measurement systems.

Intended learning outcomes:

Knowledge and understanding

The students will:

  • understand the basic physical laws in the field of laser measurement technology;
  • understand the operation of different laser measurement methods, their characteristics, structure and applications;
  • know the basic operations in digital image processing;
  • know the state-of-the-art in the field of laser measurement systems;
  • know the procedures used for planning and developing the individual laser measurement methods.

Usage

Upon the conclusion of the course, the students will be qualified to:

  • use laser systems in the development of new applications
  • autonomously find further information when solving engineering problems.

Reflection

The students will be fit to carefully deliberate and support with arguments the decision for using laser systems in solutions to concrete problems.

Transferrable skills – related to more than one course

  • Using basic knowledge to solve engineering problems,
  • analytical thinking,
  • systematic and quantitative approach to problem solving
  • teamwork.

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