Text Box: Moiré Interferometry shows the deformation caused by partial drying of a human tooth section.  The contour interval is 0.417 µm/fringe (courtesy of Measurements Group)

 

 

 

Engineering Optics
(Toy with Light)

 

 

 

 

 

 

 

 

MicTech Lab

Contact

Instructor: Wei-Chih Wang, Ph.D.                                               

Office: Delta Hall 319

Grading:  credits 
Class Time: Lecture M 1:20-3:10 ( Eng Bldg 1 211)

       Lab         Th 1:10-2:10 PM (TBA)

 

Objectives

The main goal of this course is to introduce engineers to the characteristics of light that can be used to accomplish a variety of engineering tasks especially in mechanical analysis at macro and micro scales. At the end of the course, students should have a broad understanding of the fundamental science, basic operation, technology choice, and practical aspects of free space and guided-wave optics, with an emphasis on the applications for optics in mechanical measurement, and have a sense of how to evaluate the potential of optical methods vs. non-optical methods for any task.

 

The course involves lectures, design homework, laboratory work and a final project. The course is focused on the study of mechanical behavior of materials through optical experimental methods. The theoretical background and technique for testing will be extensively discussed. The lab work involves several major projects as well as various testing demonstrations. Most of the projects involve analysis, instrumentation, and theoretical predictions, as well as written reports.  The final design project will require both theoretical and actual hardware design as well as an oral and written presentation.   

 

Topics

Review of Geometric Optics and Electromagnetic wave Theory

Introduction to Light sources and photodetectors

Geometric Moiré: In-plane displacement measurement

Geometric Moiré: out of plane displacement measurement

Moiré Interferometry: Interference and Diffraction, Grating fabrication

Moiré Interferometry: Holographic and Laser Speckle Interferometry

Photoelasticity: theory, techniques and

Multilayer structure: waveguide, filters

Introduction to fiber optic and waveguide delivery and detection

Periodic structure sensors

 

Audiences

This course is for persons interested in experimental mechanics, physics, stress analysis, deformation analysis, motion measurement, engineering design, structural testing, metrology, nondestructive inspection, and similar fields.   This course mainly serves students in mechanics, and civil, mechanical, and materials engineering. This course should also be of interest to those interested in validation of numerical models.

 

"Experimental evidence is the truth theory must mimic."

 

 

 

Textbooks and References

· Optical Methods of Engineering Analysis, Gary Cloud, Cambridge University Press.

· Handbook on Experimental Mechanics, Albert S. Kobayashi, society of  experimental mechanics.

· Applied Electromagnetism, Liang Chi Shen, Weber&Schmidt Dubury

· Fundamentals of Photonics, B. Saleh, John Wiley& Sons.

· Optoelectronics and Photonics: Principles and Practices, S. O. Kasap, Prentice Hall.    

· Fiber optic Sensors, E. Udd, John Wiley& Sons     

· Selected papers in optical sensors, optical MEMS devices and integrated Optical devices.  

· Additional reading materials will be handed out or links will be provided!  

 

Course Prerequisite(s)

·           First year physics in Optics or permission of instructor.

·           Junior level Mechanics of materials or equivalent.

·           Knowledgeable in CAD Software (e.g. AutoCAD or SolidWorks)

·           A creative mind and willingness to get one’s hands dirty in construction

·           Come to class with an open mind and a willingness to participate fully!  

 

Lecture Notes and Assignments

Week 1  Introduction of light – nature of light, Production and measurement of light Electromagnetic

            spectrum, Ray-Optics Approach (Snell's law, Geometric optics, thin lens, mirror and matrix method)

 

Week 2  Ray-Optics Approach (Snell's law, Geometric optics, thin lens, mirror and matrix method)

 

Week 3  Ray-Optics Performance Factors (diffraction effect, aberrations- geometry, chromatic, astigmatism,

              coma, field curvature, distortion, lateral color)

 

Week 4  Electromagnetic-Wave Approach (wave equation, polarization, diffraction, interference, grating)

 

Week 5  Electromagnetic-Wave Approach (wave equation, polarization, diffraction, interference, grating)

 

Week 6  Electromagnetic-Wave Approach (wave equation, polarization, diffraction, interference, grating)

 

Week 7  Optical Components (optical materials, coatings, filters, mirrors, lenses, prisms and polarizing optics)

  

Week 8  Light sources (broad band gas and filament light sources, LED, coherent gas  and solid state

             light sources)

 

Week 9 Radiometry and Photometry

 

Week 10 Detectors (photodiode, phototransistor, photomultiplier, CCD camera)

 

Week 11 Optics in mechanical measurement: Free space Optics (Geometric Moiré: In-plane displacement   

               measurement) 

 

Week 12 Optics in mechanical measurement: Free Space Optics (Moire Interferometry: Interference and

              Diffraction, Grating fabrication)

 

Week 13 Optics in mechanical measurement: Free Space Optics (Moiré Interferometry: Holographic and Laser Speckle Interferometry)

 

Week 14 Optics in mechanical measurement: Free Space Optics (Photoelasticity, birefringent property measurement, digital imaging method)

 

Week 15 Multilayer structure- waveguide, fiberoptic, filters (fundamental waveguide theory and application)

 

Week 16 Optics in mechanical measurement: Fiberoptic and polymer waveguide sensors (Intensity modulation, phase modulation)

 

Week 17 Periodic structure sensors (Grating, photonic crystal, metamaterial)

 

Week 18: Final Presentations

 

 

Homeworks and Design Projects

Design Project #1: Mirror design project

Homework #1

Design Project #2: Prism design project

Homework#2

Design Project #3: RP Optics

Homework#3

Design Project #4: Edible Optics

Homework #4

Final project

Lab

Lab 1 Refraction and Diffraction Experiment

Lab 2 Geometric Moiré Experiment

Line and grid patterns:

Download grating1 (period: 0.03 inch)

Download grating2 (period: 0.031 inch)

Download grating3 (period: 0.0311194968 inch)

Download grid1 (period: 0.03 inch)

Download grid2 (period: 0.031 inch)

Lab 3 Moiré Interferometry Experiment

Lab 3 Grating Sample Preparation Procedure

Lab 4 Shadow Moiré Experiment