| Fresnel lens |
lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
출처: wordnet.princeton.edu/perl/webwn
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| Fresnel lens |
condenser lens used on a spotlight to gather together the rays of light coming from a source and direct them into a narrow beam.
출처: www.profotos.com/education/referencedesk/glossary/...
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| Fresnel lens |
A thin, flat lens made by cutting concentric circular grooves into its surface. The grooves act like prisms to bend and focus light. The Fresnel lens is often used for the condenser lens in overhead projectors and in studio spotlights.
출처: www.pricedrightllc.com/id22.html
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| Fresnel l. |
a thin lens made up of a number of stepped setbacks concentrically arranged; it has the optical properties of a much thicker lens.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Fresnel lenses |
[A. J. Fresnel, Fr. physicist 1788?1827] A magnifying glass that distorts vision, preventing the eye from fixating. Under its influence spontaneous and gaze-specific nystagmus can be precisely evaluated.
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