fresnel lens

Noun
  1. Lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length (synset 103400695)
    is a type of: lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
    is a part of:
    • headlamp, headlight - a powerful light with reflector; attached to the front of an automobile or locomotive
    • searchlight - a light source with reflectors that projects a beam of light in a particular direction

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