- optical bench
- optical bistability
- optical branch
- optical brightener
- optical card
- optical carrier
- optical cavity
- optical center
- optical character
- optical characteristic
- optical check
- optical circulator
- optical coherence
- optical combiner
- optical communication
- optical communications
- optical comparator
- optical computer
- optical computing
- optical connection
- optical connector
- optical correlator
- optical coupler
- optical coupling
- optical database
- optical density
- optical detection
- optical detector
- optical disc
- optical disk
- optical dispersion
- optical distance
- optical distortion
- optical drive
- optical duplexer
- optical electron
- optical encoder
- optical exchange
- optical fiber
- optical fibre
- optical filter
- optical flare
- optical flat
- optical flux
- optical force
- optical frequency
- optical gain
- optical gauge
- optical glass
- optical graticule
- optical head
- optical holography
- optical illusion
- optical image
- optical index
- optical indicator
- optical input
- optical instrument
- optical interface
- optical interference
- optical invariant
- optical isolation
- optical isomer
- optical lantern
- optical length
- optical link
- optical lithography
- optical maser
- optical mask
- optical master
- optical materials
- optical medium
- optical memory
- optical method
- optical modulation
- optical modulator
- optical mouse
- optical multiplex
- optical multiplexer
- optical multiplexing
- optical neurocomputer
- optical oscillation
- optical output
- optical path
- optical pattern
- optical phenomena
- optical plastics
- optical polarization
- optical prism
- optical processing
- optical projection
- optical publishing
- optical pulse
- optical pumping
- optical pyrometer
- optical quantities
- optical radiation
- optical radiator
- optical rangefinder
- optical reader