Achromatism
Definition
The property of an optical system to transmit or reflect light without producing chromatic aberrations, allowing the formation of a sharp image without fringing. In a medical or biological context, the term refers to the total absence of colored pigments in a tissue or anatomical structure, or a visual anomaly where the subject perceives the world exclusively in shades of white, black, and gray.
Bilingual Equivalents
- Achromatism
- Achromasia
Grammatical & Source Details
| Inflection Type | Neuter noun used strictly in the singular form within technical structures. |
| Formation | Neologistic borrowing via French 'achromatisme', rooted in the Greek prefix 'a-' (without) and 'chroma' (color). |
| Spelling / Pronunciation | [a.kro.ma.ˈtism] |
| Source | Lexicon of Optical Engineering and Medical Pathologies |
Contextual Usage Examples
RO: Inginerul a ajustat distanța dintre lentile pentru a obține un acromatism perfect în interiorul noului obiectiv fotografic.
EN: The engineer adjusted the distance between the lenses to achieve perfect achromatism inside the new photographic objective.
RO: În cadrul examinării histologice, medicul a observat un acromatism celular suspect la nivelul țesutului cutanat.
EN: During the histological examination, the doctor observed a suspicious cellular achromatism within the skin tissue.
RO: Un acromatism absolut al sistemului de vederi este dificil de realizat fără utilizarea unor sticle speciale cu dispersie redusă.
EN: An absolute achromatism of the viewing system is difficult to achieve without using special low-dispersion glass.
Idioms & Phrases
Acromatism optic / Optical achromatism
RO: Capacitatea unui ansamblu de lentile de a focaliza razele de lumină de culori diferite în același punct focal unic.
EN: The capacity of a lens assembly to focus light rays of different colors onto a single focal point.
Acromatism celular / Cellular achromatism / achromasia
RO: Stare patologică sau stadiu de dezvoltare în care celulele își pierd afinitatea naturală pentru coloranții biologici de laborator.
EN: A pathological state or development stage where cells lose their natural affinity for laboratory biological stains.
Grad de acromatism / Degree of acromatism
RO: Valoare numerică sau măsură tehnică ce indică eficiența eliminării spectrului de culori parazite dintr-un dispozitiv optic.
EN: Numerical value or technical measurement indicating the efficiency of eliminating the parasitic color spectrum from an optical device.
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