SINCE 1828
Fresnel lens
noun
Fres·nel lens
| \ ˈfrez-nəl-
, frā-ˈnel-
\
, frā-ˈnel-
\
Definition of Fresnel lens
: a lens that has a surface consisting of a concentric series of simple lens sections so that a thin lens with a short focal length and large diameter is possible and that is used especially for spotlights
Keep scrolling for more
Comments on Fresnel lens
What made you want to look up Fresnel lens? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
A Green Quiz
-
- What is the best definition of green-eyed monster?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
-
A Green Quiz
How many questions can you answer about the word "green"?
Take the quiz -
Return of Name that Color!
Additional colors! More obscure than before!
Take the quiz -
Name That Thing
Test your visual vocabulary with our 10-question challenge!
Take the quiz -
Syn City
Build a city of skyscrapers—one synonym at a time.
Play the game
Share Fresnel lens
Resources for Fresnel lens