optic axis
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English
[edit]Noun
[edit]optic axis (plural optic axes)
- The optical axis. [from 17th c.]
- 1665, Robert Hooke, Micrographia, section XXXIX:
- [B]inocular creatures can in an instant […] move their eyes so as to direct the optick Axis to any point […].
- (crystallography, mineralogy) The direction in which a ray of light passing through a crystal does not suffer double refraction. [from 19th c.]