crown lens
- noun
- Specialized
:
lente de corona
- Optical designers often pair a crown lens with a flint lens to correct chromatic aberration.
Examples
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The microscope uses a crown lens to achieve clear and accurate images.
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He replaced the damaged element with a high-quality crown lens to improve the camera's performance.
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The crown lens provides excellent clarity.
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Many telescopes use a crown lens for better focus.
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The microscope uses a crown lens to achieve clear and accurate images.
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Optical designers often pair a crown lens with a flint lens to correct chromatic aberration.
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He replaced the damaged element with a high-quality crown lens to improve the camera's performance.
Synonyms
175
2.5
A clear curved piece of glass or plastic that focuses light
A curved piece of clear glass or plastic that focuses light in cameras and microscopes
Surface Forms
Morphology
The word 'lens' makes the referent clearly an optical device, but the modifier 'crown' here refers to a specific type of glass (crown glass), not the common sense 'top' or 'royal'. A B1 learner who only knows the basic meanings of 'crown' and 'lens' would likely not infer the material/type meaning, so the relation is partially transparent but not fully predictable.
Etymology
Crown lens comes from the old glass called 'crown glass', which glassmakers made by spinning hot glass into a round, crown-like disc. Because this clear 'crown glass' kept colors from mixing and gave sharp images, a crown lens today is a lens made from that glass and used to make photos and microscope views clearer.