Fresnel
Stepped lighthouse optic
Fresnel appears most often as an attributive describing optical concepts developed by physicist Augustin-Jean Fresnel.
A Fresnel lens uses concentric rings to achieve the focusing power of a thicker lens while remaining thin and flat—used in lighthouses, stage lights, and overhead projectors.
Fresnel lights are common in theater and film production.
The Fresnel zone describes wave propagation in telecommunications.
Light-focusing curved glass
- diffractionWaves spreading past obstacles
- refractionWave bending between media
- lighthouseCoastal beacon tower
- spotlightConcentrated illumination source
stage lighting · beacon · magnification · concentric · rings · ridges · projection · collimation
Guiding light source
tower · lamp · rotating · prism · navigation · nautical · focal plane · visibility
Concentrated illumination source
- stageRaised performance platform
- barn doorsAgricultural building entrance panels
- tungstenElement seventy-four
- LED panelFlat diode-based illumination surface
cinematography · grip · gaffer · soft light · studio · broadcast · key light · fill light
Mathematical equality statements
- reflectionReturned light or thought
- coefficientNumber multiplying a variable
- transmissionSending of information
- polarizationSeparation into opposing extremes
wave theory · rhomb · phase · amplitude · boundary conditions · Huygens · electromagnetic · Brewster
lens
Light-focusing curved glass
- diffractionWaves spreading past obstacles
- refractionWave bending between media
- lighthouseCoastal beacon tower
spotlight · stage lighting · beacon · magnification · concentric · rings · ridges · projection · collimation · stepped
beacon
Guiding light source
keeper · tower · lamp · rotating · prism · navigation · nautical · focal plane · visibility · seascape
spotlight
Concentrated illumination source
- stageRaised performance platform
- barn doorsAgricultural building entrance panels
- tungstenElement seventy-four
LED panel · cinematography · grip · gaffer · soft light · studio · broadcast · key light · fill light · production
equations
Mathematical equality statements
- reflectionReturned light or thought
- coefficientNumber multiplying a variable
- transmissionSending of information
polarization · wave theory · rhomb · phase · amplitude · boundary conditions · Huygens · electromagnetic · Brewster
- Fresnel diffractionLight bending near obstacles
- fresnel lensRidged flat optical concentrator