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词汇 anastigmatic
释义

Definition of anastigmatic in English:

anastigmatic

adjectiveˌanəstɪɡˈmatɪkˌænəstɪɡˈmædɪk
  • (of a lens system) constructed so that the astigmatism of each element is cancelled out.

    (透镜系统)消像散的

    Example sentencesExamples
    • Important special cases of stationary anastigmatic mounts and their performance are presented.
    • It is thus an object of this invention to provide a three mirror anastigmatic optical system employing conic mirrors wherein the system is off-axis in both aperture and field angle.
    • A table of parameters for anastigmatic lenses is included.
    • By increasing 2, as compared to the anastigmatic design, the coma can be cancelled completely.
    • Devices that reduce technical difficulty and anastigmatic time when repairing large vessels such as the thoracic aorta would be beneficial.

Origin

Late 19th century: from an-1 'not' + astigmatic (see astigmatism).

Definition of anastigmatic in US English:

anastigmatic

adjectiveˌanəstiɡˈmadikˌænəstɪɡˈmædɪk
  • (of a lens system) constructed so that the astigmatism of each element is canceled out.

    (透镜系统)消像散的

    Example sentencesExamples
    • Devices that reduce technical difficulty and anastigmatic time when repairing large vessels such as the thoracic aorta would be beneficial.
    • It is thus an object of this invention to provide a three mirror anastigmatic optical system employing conic mirrors wherein the system is off-axis in both aperture and field angle.
    • A table of parameters for anastigmatic lenses is included.
    • By increasing 2, as compared to the anastigmatic design, the coma can be cancelled completely.
    • Important special cases of stationary anastigmatic mounts and their performance are presented.

Origin

Late 19th century: from an- ‘not’ + astigmatic (see astigmatism).

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