Optoelectronic Instrumentation

Year
4
Academic year
2020-2021
Code
02003088
Subject Area
Biomedical Engineering
Language of Instruction
Portuguese
Other Languages of Instruction
English
Mode of Delivery
Face-to-face
Duration
SEMESTRIAL
ECTS Credits
6.0
Type
Elective
Level
2nd Cycle Studies - Mestrado

Recommended Prerequisites

Electronics, Waves and Optics.

Teaching Methods

The syllabus themes are presented using examples and applications in the field of biomedical engineering. Laboratory classes and experimental demonstrations. Solving (in group and with supervision) engineering problems requiring the joint application of concepts from different syllabus chapters and intensive use of equipment and components data sheets. Mandatory presence in seminars addressing syllabus themes. Discussion of scientific papers related to syllabus topics. Small instrumentation project with public oral presentation. Open book exams.

Learning Outcomes

At the end of this curricular unit, students must:

Know the physical principles and technical features of lasers and light detectors available in the market. Interpret correctly the data sheets produced by manufacturers of lasers and light detectors. Know how to evaluate the irradiance of a scene image and calculate the signal-to-noise ratio of a detected image or optical signal. Know how to calculate the maximum permissible exposure (ocular and skin) and the nominal ocular hazard distance for non-aided and aided observation, for laser radiation, in accordance with the IEC/EN 60825.1 Standard. Know how to specify protection goggles against laser radiation in accordance with the IEC/EN 60825.1 Standard. Know the optical properties of most biological tissues. Know the interaction mechanisms between light and biological tissues. Know the main medical applications of lasers and optical fibres.

Work Placement(s)

No

Syllabus

1-Basic notions of radiometry and photometry
Radiometric units
Fundamental equation of radiometry
Lambert’s Law
Image formation: irradiance
Photometric units
Conversion between radiometric and photometric units
2-Detectors
Photodiodes
Photomultipliers and image intensifiers
APDs
CCDs
3-Optic Components
Light Sources
Dispersive Elements
Filters
Polarizers
4-Lasers
Physical Principles
Stimulated emission
Population inversion
Pump conditions
Mode locking
Q-switching
5-Optical Properties of biological tissues
Absorption
Scattering
Light propagation in biological tissues
Laser-tissue interaction mechanisms
6-Safe use of lasers: IEC/EN 60825.1  Standard
Maximum permissible exposures for eye and skin
Lasers classification
Eyewear protection and barriers
7-Lasers in medicine
Main medical lasers
Confocal Microscopy
OCT
Tissue ablation, coagulation, cut and welding
Low level laser therapy
Photodynamic therapy
8-Optical fibers
Principles and technology
Endoscopes
Fiberscopes

Assessment Methods

Assessment
Laboratory work or Field work: 25.0%
Project: 25.0%
Exam: 50.0%

Bibliography

Lasers and Optical Fibers in Medicine - Abraham Katzir Academic Press, 1993
A System Engineering Approach to Imaging - Norman S. Kopeika SPIE-International Society for Optical Engine, 1998
Boulnois JL. Photophysical processes in recent medical laser developments: a review. Lasers Med Sci 1986, 1:47-66
Handbook of Optical Biomedical Diagnostics Valery Tuchin Ed. SPIE Press, 2002 Tissue Optics Valery Tuchin SPIE Tutorial Texts in Optical Engineering, 2000 Biomedical Photonics Handbook, Tuan Vo-Dinh, CRC, 2003
IEC 60825-1 Safety of laser products Part 1: Equipment classification. requirements and users guide, IEC, 2001
Handbook of fiber optics : theory and applications, Chai Yeh, Academic, 1990 artigos de revistas científicas/scientific papers