| skos:altLabel | - optic
- optics
- diffract
- lenses
- Fresnel
- lens
- dioptric
- dioptric lens
- second-order
- first-order
- fresnel
- third-order
- 1st order Fresnel
- 2nd order Fresnel lens
- 3rd order Fresnel lens
- 3rd-order
- 4th-order
- 6th order
- 6th order dioptric lens
- Fourth order fresnel
- Fourth-order Fresnel
- Fourth-order Fresnel lens
- Fresnel Lens
- Fresnel Rotary lens
- Fresnel apparatus
- Fresnel belt lens
- Fresnel collector
- Fresnel immovable lens
- Fresnel lamp
- Fresnel lens sizes (orders)
- Fresnel lens#Lighthouse lens sizes
- Fresnel lens#Sizes of lighthouse lenses
- Fresnel lens#Uses
- Fresnel lenses
- Fresnel lesnes
- Fresnel lighthouse lens
- Fresnel optic
- Fresnel lens: History
- Fresnel-lens
- Original lens
- Second order Fresnel
- Second-order
- Third order Fresnel
- dioptric lenses
- dioptric optic
- fifth-order Fresnel lens
- first-order Fresnel lens
- first-order lens
- fourth order
- fourth order Fresnel lens
- fourth-order
- fourth-order lens
- fresnel lens
- fresnel rings
- lantern lens
- low-tech magnifying lenses
- mesoradial lenses
- prismatic lens
- second order Fresnel lens
- second order dioptric lens
- sixth-order lens
- third order Fresnel Lens
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