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An optical axis is an imaginary line that passes through the geometrical center of an optical system such as a camera lens, microscope or telescopic sight. Lens elements often have rotational symmetry about the axis.
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axis optical center system passes lens often rotational symmetry along also microscope lenses mirrors article incorporates public domain material imaginary
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Optical axis | is a | imaginary line that passes through the geometrical center of an optical system such as a camera lens | 0.90 | text |
| a camera lens | instance of | An optical axis is an imaginary line that passes through the geometrical center of an optical system | 0.80 | text |
| microscope or telescopic sight | instance of | An optical axis is an imaginary line that passes through the geometrical center of an optical system | 0.80 | text |
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