Optics

Foundational optics overview — reflection, refraction, Fermat's principle, paraxial approximations, stops and pupils, f-number, numerical aperture, étendue, and ray matrix methods.

Centralized reference for optical substrate and bulk materials — glasses, crystals, metals, polymers. Transmission ranges, refractive indices, thermal and mechanical properties.

Optical windows, flats, and protective covers — parallelism, transmitted wavefront, wedge angle, and material selection by wavelength and environment.

Complete lens education — types, geometry, refraction, thin/thick lens theory, Gaussian beam propagation, materials, aberrations, coatings, and selection.

Flat and curved mirrors — including parabolic and off-axis parabolic. Substrates, coatings, surface quality, application selection.

Optical filters — absorptive, reflective/dichroic, bandpass, notch, edge (longpass/shortpass), ND. Application-specific selection for spectroscopy, imaging, and laser systems.

Beam splitting and combining optics — plate, cube, pellicle, and dichroic beamsplitters. Polarizing vs. non-polarizing, splitting ratio specs, and application selection.

Multi-element systems — achromatic doublets, apochromats, beam expanders, relay systems, microscope objectives, and classical lens forms.

Thin-film optical coatings — AR, HR, dichroic, metallic, and specialty. Material properties, hardness, durability, and specification.

Polarization as a fundamental property of light and the components that control it — polarizer types, waveplates, Faraday isolators, and measurement.

Gratings, zone plates, computer-generated holograms, and hybrid refractive–diffractive elements — diffraction theory, grating equation, efficiency, fabrication, and selection.

Understanding and calculating LIDT for coatings and bulk materials. Critical crossover connecting to CW, pulsed, ultrafast, coatings, and materials.

Optical fiber types, coupling, connectors, and free-space-to-fiber interfacing — the practical fiber knowledge needed for lab photonics.