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L6-55: FRESNEL FLASHLIGHT 9 years 8 months ago #897

  • zzfixk21
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ID Code: L6-55
Purpose: Show an application of the Fresnel lens.
Description: A "Fresnel flashlight" has a Fresnel lens covering the central area of the glass, causing light which would normally spread out over a large cone to be focused into a nearly parallel beam. Unfortunately, when you compare the light output of this Fresnel flashlight with that of a normal flashlight it really doesn't seem brighter. But it's a nice idea for peddling flashlights.
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Last edit: by zzfixk21.
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