CITATION — REFERENCE ENTRY
fresnel-lens-and-use · primrose-theatrecrafts-types-of-lantern
- Claim ID
- fresnel-lens-and-use
- Assertion
- The Fresnel lantern uses a lens with stepped concentric circles on the front and a pebbled back, named for Augustin-Jean Fresnel; it was first used in stage lighting in the late 1920s and gives more control over beam angle than a flood but less than a profile.
- Locator
- section: Fresnel
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