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Indian Institute of Technology Madras

Optical Engineering

Indian Institute of Technology Madras and NPTEL via Swayam

Overview

Optics is used in many applications today. In fact, the field of optics has quietly gone from the research table to being used in numerous applications ranging from devices to metrology. Opto-electronics and metrology are already well-developed fields merging the areas of optics and a variety of other engineering areas (such as electronics, mechanical engineering, etc) in many advanced and commonly used devices. For an engineering student to be able to understand and design optics for such applications, it is important to understand some basic optics. This course will introduce these concepts at a level relevant for an engineer. The course will start by looking at Geometric optics, before moving on to Gaussian optics and then wave optics. The course will also study specific engineering examples with a detailed look at the optics of these. A lab will be run along with the course. In the first part, an optical design software called Optics Software for Layout and Optimization (OSLO) will be used. The ideas and concepts of geometric optics will be developed through a series of exercises involving OSLO. Concepts on wave optics will be demonstrated through exercises involving either Python or Matlab.INTENDED AUDIENCE : Third or Final year BE/BTech, First year ME/MTech/MS/PhDPRE- REQUISITES : ElectromagneticsSUPPORT INDUSTRY : Holmarc, NeST Photonics, Appasamy Assoicates, LV Prasad Eye Institute , ISRO, DRDO

Syllabus

Week 1 : Introduction to Optical Engineering Postulates of Geometric Optics Geometric Optics and Imaging, Refraction at a single surfaceWeek 2 : Thin lens, Lens imaging conditions, Aperture stop, pupils, important rays
Lab: Introduction to Optics Software for Layout and Optimization (OSLO). Case study: Snells Law
Week 3 : Ray tracing using matrix method, Thick lenses, principal planes
Lab: OSLO - Designing a lens with specific focal length.
Week 4 : Monochromatic Aberrations, means of quantifying aberrations
Lab: OSLO - Locating the cardinal points of an optical system
Week 5 : Chromatic Aberrations, correcting aberrations
Lab: OSLO - Aberration Optimisation, Part 1
Week 6 : Gaussian beams, transmittance of an optical element
Lab: OSLO- Aberration Optimisation, Part 2
Week 7 : Gaussian beam transformation through a lens
Lab OSLO -Exploring different kinds of coordinate systems in OSLO
Week 8 : Basics of InterferenceWeek 9 : Applications of Interference, holography
Lab: (Matlab or Python) - Introduction
Week 10 : Basics of diffraction
Lab: (Matlab or Python) – Studying interference through simulations
Week 11 : Applications - Barcode readers,Finger print sensors,Pick-up heads used in DVD/CD players,Biomedicalinstrumentation Interferometers for metrology (Optical coherence tomography)SensorsWeek 12 : Applications - Barcode readers,Finger print sensors,Pick-up heads used in DVD/CD players,Biomedicalinstrumentation Interferometers for metrology (Optical coherence tomography)Sensors

Taught by

Prof. Shanti Bhattacharya

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