optical crown
- noun
- Specialized
:
coroa óptica
- Modern camera systems may use a combination of optical crown and flint glass to correct chromatic aberration.
Examples
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The microscope's objective lens was made from high-quality optical crown to ensure sharp imaging.
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Engineers often choose optical crown for lenses because of its low dispersion properties.
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The optical crown is essential for high-quality lenses.
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Many photographers prefer using optical crowns for their cameras.
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Engineers often choose optical crown glass for lenses due to its low dispersion properties.
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The microscope's objective lens is crafted from optical crown to provide clear and sharp imaging.
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Many photographers select optical crown for their camera lenses because it minimizes color fringing.
Synonyms
1
6.0
A clear, strong glass that lens makers use for camera and telescope lenses
Clear glass used in camera lenses that bends light less and keeps colours from separating
A type of glass lens makers use that bends light little and keeps colours from separating
How Dispersive
Surface Forms
Morphology
This is a specialized technical term: the sense of 'crown' here names a class of optical glass, not the literal 'summit' or 'top', so a B1 learner knowing 'optical' and 'crown' would not predict properties like low dispersion or refractive index. The meaning is terminological and not compositionally derived from the constituent words, making it unpredictable without prior exposure.
Etymology
Optical crown may come from the old term 'crown glass', where crown meant a clear, trusted kind of glass. So the image of a crown helps you remember this is the clear glass used in lenses because it keeps images sharp and stops colors from spreading.