optic axis Meaning, Definition & Usage
-
noun in a doubly refracting crystal, the line in the direction of which no double refraction occurs
- a crystal may have either one or two optic axes
-
noun a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
principal axis.
- in a normal eye the optic axis is the direction in which objects are seen most distinctly