apochromat: meaning, definition, pronunciation and examples
Very LowTechnical/Specialized
Quick answer
What does “apochromat” mean?
A lens or lens system that is corrected for chromatic aberration at three or more wavelengths, providing superior color correction compared to an achromat.
Audio
Pronunciation
Definition
Meaning and Definition
A lens or lens system that is corrected for chromatic aberration at three or more wavelengths, providing superior color correction compared to an achromat.
In optics and photography, a high-performance lens designed to bring three primary colors (typically red, green, and blue) to a common focus, minimizing color fringing and producing sharper, more accurate images. The term can also refer to the optical system itself.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling is identical. The technical specification and application are universal.
Connotations
Identical connotations of high precision, advanced engineering, and superior optical quality in both varieties.
Frequency
Equally rare in both UK and US English, confined to highly specialized technical fields.
Grammar
How to Use “apochromat” in a Sentence
The [optical instrument] is fitted with an apochromat.An apochromat [verb: corrects, reduces, eliminates] chromatic aberration.Vocabulary
Collocations
Examples
Examples of “apochromat” in a Sentence
adjective
British English
- The apochromatic design is superior.
- They needed an apochromatic objective.
American English
- The apochromatic design is superior.
- They needed an apochromatic objective.
Usage
Meaning in Context
Business
Rare. Might appear in technical sales literature for high-end optical equipment.
Academic
Common in physics, engineering, and biology (microscopy) textbooks and research papers.
Everyday
Virtually never used.
Technical
The primary domain. Used in specifications, manuals, and discussions among opticians, photographers, astronomers, and microscopists.
Vocabulary
Synonyms of “apochromat”
Strong
Neutral
Weak
Vocabulary
Antonyms of “apochromat”
Watch out
Common Mistakes When Using “apochromat”
- Misspelling as 'apocromat' or 'apochromate'.
- Using it as a general term for any high-quality lens.
- Incorrect pronunciation stressing the second syllable (e.g., apo-CHRO-mat).
FAQ
Frequently Asked Questions
An achromat is corrected for chromatic aberration at two wavelengths, while an apochromat is corrected at three or more wavelengths, providing superior colour accuracy.
No, it is a highly specialized term used almost exclusively in technical fields like optics, microscopy, photography, and astronomy.
No, it is solely a noun. The related adjective is 'apochromatic', which describes a lens or system possessing the qualities of an apochromat.
They require special, often exotic, glass types (like fluorite or ED glass) and more complex optical designs to achieve the higher degree of colour correction.
A lens or lens system that is corrected for chromatic aberration at three or more wavelengths, providing superior color correction compared to an achromat.
Apochromat is usually technical/specialized in register.
Apochromat: in British English it is pronounced /ˈapə(ʊ)krə(ʊ)mat/, and in American English it is pronounced /ˈæpəˌkroʊmæt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'APart from Colour problems' – an APOchromat keeps colours APart correctly.
Conceptual Metaphor
OPTICAL CLARITY IS PURITY. The apochromat is a 'purifier' of light, removing the 'impurity' of unfocused colors.
Practice
Quiz
What is the primary function of an apochromat?