meniscus
8.9
A lens curved inward on one side and outward on the other that focuses light
- noun
- /məˈnɪskəs/
- Specialized
:
lente menisco
- This type of bulb (2.33 V, 270 mA), called "pre-focused," incorporates a meniscus lens in its glass envelope, which focuses the light at a fixed beam angle of about 27 degrees.
Examples
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The photographer used a meniscus lens to achieve a unique focus effect in her portrait shots.
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Pocket Premo, 12 exposure pack with meniscus lens.
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In many optical devices, a meniscus lens can help to disperse light evenly across the image.
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The scientist explained how a meniscus lens works to focus light in telescopes during the lecture.
Synonyms
lens
vsmeniscus
175
2.5
A clear curved piece of glass or plastic that focuses light
is a specific curved shape rather than any transparent focusing object
3.9
A curved piece of clear glass or plastic that focuses light in cameras and microscopes
is a specific curved shape concave on one side and convex on the other
Surface Forms
Etymology
Meniscus comes from the Greek meniskos, which means 'small moon' or 'crescent'. A meniscus lens is bent like a little moon, with one side curved in and the other curved out, and that moon-like shape helps it focus or spread light.