International Electrotechnical Commission
Glossary

ENFresnel lens 
optical device that employs mini-prisms that focus light at a point or on a line

NOTE 1 The mini-prisms may be concentric circles for point-focus or linear for focus to a line

NOTE 2 Each mini-prism is slightly different in angular shape so the light is focused at the same point or line.

NOTE 3 Fresnel lenses can be fabricated in a flat or curved shape by stamping or extruding plastic sheets


TC/SC:82Terms     Info     Publications
Published in:IEC 61836, ed. 2.0 (2007-12) Terms     Info
Reference number:3.8.8

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