Dual Focus

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
DF
Pronunciation
/duəl ˈfoʊkɪs/
Category
Miscellaneous
Related Field
Photography & Imaging

Examples in Context

  1. The birefringent lens, consisting of a piece of birefringent crystal and a piece of optical glass, is a key component in the dual focus interference microscope.
  2. Focal Shift and Focal Switch of Partially Coherent Light in Dual Focus(DF) Systems
  3. The ellipsoid lens antenna in this paper is different from lens antenna and rotating dish antenna, it has dual focus structure, can focus the energy from one focusing point to another focusing point.
  4. Reform of dual statuses and dual functions : the focus of institutional reform of government
  5. The factors that effect the measuring accuracy of dual star point fixed focus measuring method for minimun focal length of plane optical element is analyzed. Some problems which should be given attention to in test are pointed out.

Other meanings of DF

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