Course detail

Wave Optics

FSI-TAOAcad. year: 2021/2022

The course consists of two parts.
The first part deals with the interference of light and related experiments. The following topics are explained and practised: Coherence of light, the contrast of the interference structure and the interpretation of the pattern obtained both by classical and by holografic interference methods.
The second part of the course is focused on the scalar diffraction in optics. The diffraction integral is discussed in detail and applied to the calculation of intensity and phase distribution in the diffraction patterns of the Fraunhofer and of the Fresnel types. The diffraction integral is derived in three ways:
(i) intuitively, from the Huygens-Fresnel principle,
(ii) from the wave equation by means of theorems of the integral calculus of functions of several variables,
(iii) by the superposition of plane waves.
Also the Rubinowicz representation of the boundary wave is derived and discussed. Interference and diffraction phenomena are demonstrated and practised in laboratories.

Language of instruction

Czech

Number of ECTS credits

7

Mode of study

Not applicable.

Guarantor

prof. RNDr. Radim Chmelík, Ph.D.

Department

Institute of Physical Engineering (ÚFI)

Learning outcomes of the course unit

1. Knowledge of the theory of optical interference and diffraction phenomena.
2. Experimental erudition for the work in laboratory of optical interferometry and diffraction.
3. Ability to interpret in detail diffraction and interference phenomena.

Prerequisites

Basic course of physics. Calculus of functions of several variables.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures. Teaching is suplemented by practical laboratory work.

Assesment methods and criteria linked to learning outcomes

Course-unit credit is conditional on active participation at seminars.
Examination: written test and oral examination.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The aim of the course is to provide students with basic ideas of interference, scalar theory of diffraction and its applications, and topics connected with wave optics.

Specification of controlled education, way of implementation and compensation for absences

Attendance at seminars is obligatory and is checked by the teacher. Absence may be compensated by the agreement with the teacher.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Born, M., Wolf, E.: Principles of Optics. 7th ed. Cambridge University Press 1999.
Hecht, E.: Optics. Pearson Education, 2017.
Komrska, J.: Vlnová optika, část Difrakce světla. Akademické nakladatelství CERM, s.r.o., Brno 2004.

Recommended reading

Komrska, J.: Fourierovské metody v teorii difrakce a ve strukturní analýze. Brno: CERM, 2007. 242 s.
Liška, M.: Optické sešity (texty k přednáškám). Brno, VUT 2013, 2014.
Saleh, B. E. A., Teich, C.: Základy fotoniky. Matfyzpress, Praha 1994.

Classification of course in study plans

  • Programme N-FIN-P Master's 1 year of study, winter semester, compulsory
  • Programme N-PMO-P Master's 1 year of study, winter semester, compulsory

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

prof. RNDr. Jiří Komrska, CSc.
Mgr. Věra Kollárová, Ph.D.

Syllabus

1. Scalar and vector wave. Mathematical description and properties. Polarisation.
2. Optics of anisotropic materials. Descripton, propagation of light. Optical activity, birefrigence. Polarizing elements. Optical activity.
3. The bacsics of theory of coherence. Function of mutual coherence, degree of coherence. Interference of two partially coherent waves.
4. Two-beam interference. Description, examples, calculation. Two-beam interferometry and its usage.
5. Multiple-beam interference. Fabry-Perot interferometer. Interference filter. Coatings. Diffraction gratings.
6. Holography and holographic interferometry. Visualization of phase objects. Detection of small deformations and small shifts of objects with a diffuse surface.
7. The Huygens-Fresnel principle and the diffraction integrals. The Fresnel and the Fraunhofer diffraction. The Soret plate.
8. The Fraunhofer diffraction phenomena. (Rectangular and circular apertures, the slit and the annular aperture.)
9. The Fresnel diffraction phenomena. (Half-plane, slit, strip, double-slit, circular aperture and circular obstacle, the Fresnel integrals, the Lommel functions of two variables.)
10. The Kirchhoff and the Rayleigh-Sommerfeld diffraction integrals.
11. The Fresnel diffraction as a transfer by a linear isoplanatic system.
12. The Rubinowicz representation of the boundary wave.

Laboratory exercise

14 hod., compulsory

Teacher / Lecturer

prof. RNDr. Radim Chmelík, Ph.D.

Syllabus

Young's experiment. Newton's fringes.
Shearing interferometry. Setting-up plane wave by reflection on plan-parallel plate. Estimation of the radius of curvature of the Gaussian-wave surface.
Visualization of the phase objects by Murty interferometer, Michelson interferometer and Mach-Zehnder interferometer.
Experimental arrangement for observation and registration of Fresnel and Fraunhofer diffraction patterns.
Fraunhofer and Fresnel diffraction by circular aperture.
Fraunhofer and Fresnel diffraction by a double-slit.

Exercise

12 hod., compulsory

Teacher / Lecturer

Mgr. Věra Kollárová, Ph.D.
prof. RNDr. Jiří Komrska, CSc.

Syllabus

Calculation of the intensity distribution in Youngs experiment. Estimation of the coherence length from the visibility of interference fringes.
Localization of the interference fringes in different arrangement of two-beam interference measurements.
Calculation of the parameters of antireflection coatings. Calculation of the parameters of interference filters.
Size estimation of the Fresnel zones for typical experimental arrangements in light and X-ray optics. The Fresnel zones of convergent spherical wave. Focal lenghts of the Soret plates.
Calculation of the Fraunhofer diffraction phenomena. A detailed discussion of the Airy function.
Calculation and discussion of the Fresnel diffraction by a half-plane, slit, strip, double-slit and generally by obstacles with stright-line boundaries.
Calculations and discussion of the Fresnel diffraction by a circular aperture and disc.