A
- Abbe number
- Abbe prism
- Abbe sine condition
- Aberration in optical systems
- Absorption
- Absorption spectrum
- Acousto-optics
- Acousto-optic deflector
- Acousto-optic filter
- Acousto-optic modulator
- Active laser medium
- Afterglow
- Airglow
- Airy disk
- Albedo
- Alexander's band
- Alpenglow
- Angle of incidence
- Angle of reflection
- Angular magnification
- Anti-reflective coating
- Arago spot
- Asterism (astronomy)
- Asterism (gemmology)
- Aspheric lens
- Atmospheric diffraction
- Atom optics
- Atomic, molecular, and optical physics
- Aura (optics)
- Auroral light
- Avalanche photodiode
- Aventurescence
- Axicon
Read more about this topic: Index Of Optics Articles