Optical Metrology

Code:

FIS4031

Acronym:

FIS4031

Level:

400

Keywords
Classification	Keyword
OFICIAL	Physics

Instance: 2022/2023 - 1S

Active?	Yes
Responsible unit:	Department of Physics and Astronomy
Course/CS Responsible:	Master in Engineering Physics

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
M:EF	9	Official Study Plan since 2021_M:EF	1	-	6	42	162

Teaching language

Portuguese

Objectives

Metrology is associated with measurement, the concept and general principles, as well as methodologies and techniques supported by them. At a fundamental level involves to understand the problematics about what means to be an Observer; at another level, it is of large practical importance considering the most diverse technological applications require adequate measurement standards and proper metrology to assess the state of systems. In the present case, the focus is to utilize the properties of light in the measurement process, synthetized in the words Optical Metrology. Therefore, this UC has learning objectives which are situated in a broad spectrum, ranging from the understanding of fundamental concepts up to the operational capacity of application of diverse optical measurement techniques especially in the study and application of interferometry in various areas of engineering.

 

Learning outcomes and competences

Optical metrology is a particular domain of metrology, the science of measurement with all it implies, to start with to understand what means “to measure” which keeps a central question in science, up to the set up of general methodologies and techniques associated to the measurement process, independently of the implementation technology. This affects the performance level and the application spectrum and is here where optical metrology shows special relevance considering it is normally associated to high performance and large applicability, also a consequence of the unique importance of light. Therefore, there is conviction of the coherence between the programmatic contents with the objectives looked for this UC. These are centred on the comprehension of the measurement process and in the way how it can be delivered to handle specific situations; the programmatic contents concretize such objectives for the particular but especially important case of optical phenomenology.

 

Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

Optics knowledge.

Program

The course begins with a revision of base phenomena of optical metrology, namely interference and diffraction. A brief review of optical sources and detectors will be presented. Then, it is introduced the problematic of the measurement process in the classic and quantum domains, followed by the exposition of the general principles of optical metrology. The measurement techniques based on modulation of the light intensity are presented, then is introduced an important chapter of this course which is metrology by interferometry. Topics such as types of interferometers, their performance, interaction with the measurand, and optical and optoelectronic processing will be addressed. Techniques and measurement will be studied namely: Measuring the refractive index; Measurement of radius of curvature and focal length; Angle Measurement; Thickness Measurement; Speed measurement; Pressure measurement; Length Measurement. Speckle and Moiré techniques will also be delivered. An important field of metrology deals with imaging, so will be presented the fundamentals of microscopy based on low-coherence, confocal and multiphoton. A final section will detail the principles of fiber optic based metrology and applications.

 

Mandatory literature

Toru Yoshizawa; Handbook of Optical Metrology: Principles and Applications, Toru Yoshizawa, 2015. ISBN: 9781138893634

Teaching methods and learning activities

 This course follows a conventional teaching methodology meaning by that lectures with deliver of contents and sessions of problem’s solving. The laboratorial component happens in the framework of dedicated UC which shows a list of laboratorial works/projects.

The evaluation is by a final exam and oral presentation of a work proposal.

Evaluation Type

Distributed evaluation with final exam

Assessment Components

designation	Weight (%)
Participação presencial	10,00
Apresentação/discussão de um trabalho científico	20,00
Exame	70,00
Total:	100,00

Amount of time allocated to each course unit

designation	Time (hours)
Estudo autónomo	100,00
Frequência das aulas	49,00
Trabalho escrito	13,00
Total:	162,00

Eligibility for exams

According to the University rules

Calculation formula of final grade

70% final exam + 10% attendance and 20% presentation / discussion of a scientific work.

Classification improvement

Final exam.

Observations

Júri
Orlando Frazão
Manuel Marques
Carla Rosa