Optics Course

Lesson 1 • Absorption, Transmission, and Scattering

Quantifies how media attenuate and scatter light using the Beer-Lambert law. Prepares students for material selection in optical system design.

Lesson 2 • Refraction and Snell's Law

Derives Snell's law from wave behaviour at interfaces and applies it to common materials. Establishes refractive index as a key material parameter.

Lesson 3 • Nature and Properties of Light

Covers the dual wave-particle nature of light and measurable properties. Anchors all subsequent optical analysis in physical reality.

Lesson 4 • Geometric Optics Fundamentals

Introduces ray approximation and rectilinear propagation of light. Provides the geometric framework used throughout lens and mirror analysis.

Lesson 1 • Mirror Equation and Magnification

Applies the mirror equation to calculate image distance and magnification. Connects algebraic results to physical image characteristics.

Lesson 2 • Ray Diagram Construction

Teaches systematic three-ray method for locating images graphically. Reinforces mirror equation results with visual verification.

Lesson 3 • Spherical Mirror Geometry

Defines centre of curvature, focal length, and principal axis for concave and convex mirrors. Establishes geometric vocabulary for mirror calculations.

Lesson 4 • Mirror System Aberrations

Identifies coma, astigmatism, and field curvature in mirror systems. Prepares students to evaluate and mitigate image quality degradation.

Lesson 1 • Multi-Element Lens Systems

Combines multiple lenses using system matrix methods and equivalent lens formulas. Prepares students for camera, microscope, and telescope design.

Lesson 2 • Thin Lens Theory

Derives the thin lens equation from refraction at two surfaces. Establishes converging and diverging lens behaviour as the basis for optical instruments.

Lesson 3 • Thick Lens and Principal Planes

Extends thin lens theory to thick lenses using principal plane formalism. Enables accurate modelling of real lens elements in optical systems.

Lesson 4 • Lens Aberrations

Catalogues Seidel aberrations and their impact on image quality. Provides strategies for aberration correction through lens design choices.

Lesson 1 • Interferometry and Measurement

Uses Michelson and Mach-Zehnder interferometers to measure optical path differences. Demonstrates precision measurement capabilities of wave optics.

Lesson 2 • Thin Film Interference

Applies optical path difference in thin films to predict reflected and transmitted colours. Directly relevant to anti-reflection and high-reflectance coating design.

Lesson 3 • Two-Source Interference

Derives constructive and destructive interference conditions for two coherent sources. Connects Young's double-slit experiment to wavelength measurement.

Lesson 4 • Multiple-Beam Interference

Extends two-beam analysis to Fabry-Perot etalons and their sharp transmission peaks. Introduces finesse and resolving power for spectroscopic applications.

Lesson 1 • Huygens-Fresnel Principle

Derives diffraction from secondary wavelet superposition using the Huygens-Fresnel integral. Establishes the theoretical basis for all diffraction calculations.

Lesson 2 • Optical Resolution Limits

Applies Rayleigh and Sparrow criteria to define resolution in imaging systems. Quantifies the trade-off between aperture size and resolving power.

Lesson 3 • Fraunhofer Diffraction Patterns

Calculates far-field diffraction for single slits, circular apertures, and gratings. Connects aperture geometry to intensity distribution in the focal plane.

Lesson 4 • Fourier Transform in Optics

Establishes the lens as a Fourier transform device operating on spatial frequencies. Enables spatial filtering and image processing analysis.

Lesson 1 • Polarisation States and Representation

Defines linear, circular, and elliptical polarisation using Jones vectors and Stokes parameters. Provides the mathematical language for all polarisation analysis.

Lesson 2 • Polarisation by Reflection

Derives Brewster's angle and Fresnel reflection coefficients for s and p polarisations. Connects surface reflection to polarisation-based glare reduction.

Lesson 3 • Optical Activity and Applications

Analyses optical rotation in chiral media and electro-optic polarisation modulation. Applies polarisation control to liquid crystal displays and sensing systems.

Lesson 4 • Birefringence and Wave Plates

Explains birefringence in anisotropic crystals and its use in wave plates. Enables design of quarter-wave and half-wave retarders for polarisation control.

Lesson 1 • Magnifiers and Eyepieces

Calculates angular magnification for simple magnifiers and compound eyepieces. Connects near-point distance to instrument magnification specifications.

Lesson 2 • Microscope Design and Performance

Combines objective and eyepiece to achieve high lateral magnification and resolution. Analyses numerical aperture, depth of field, and illumination requirements.

Lesson 3 • Human Eye and Visual Optics

Models the eye as an optical system with variable power and finite resolution. Establishes visual performance benchmarks for instrument design.

Lesson 4 • Camera Optics and Imaging Systems

Applies depth of field, f-number, and modulation transfer function to camera design. Connects optical performance to sensor requirements and image quality.

Lesson 1 • Laser Beam Shaping and Delivery

Applies beam expanders, spatial filters, and fibre coupling to condition laser output. Prepares students to integrate laser sources into complete optical systems.

Lesson 2 • Laser Types and Gain Media

Surveys solid-state, gas, semiconductor, and fibre laser architectures and their output characteristics. Guides source selection based on wavelength, power, and coherence needs.

Lesson 3 • Optical Resonator and Cavity Modes

Analyses Fabry-Perot resonator stability, longitudinal modes, and transverse modes. Connects cavity geometry to output beam spatial and spectral properties.

Lesson 4 • Stimulated Emission and Population Inversion

Derives Einstein A and B coefficients and the conditions for optical gain. Establishes population inversion as the prerequisite for laser action.