| 释义 |
conoid of Sturm
conoid of Sturm[¦kä‚nȯid əv ′stərm] (optics) astigmatic interval conoid of Sturm
Sturm, conoid of The bundle of rays formed by an astigmatic optical system consisting of a primary focal line (called Sturm's line), a circle of least confusion and a secondary focal line (Sturm's line) perpendicular to the first. See astigmatism; circle of least confusion. |