Sturm conoid

Sturm co·noid

(shtūrm),
in optics, the pattern of rays formed after passage through a spherocylindric combination.

Sturm co·noid

(shtūrm)
optics The pattern of rays formed after passage through a spherocylindric combination.

Sturm,

Johann C., German physician and mathematician, 1635-1703.
Sturm conoid - in optics, the pattern of rays formed after passage through a spherocylindrical combination.
Sturm interval - the distance between the anterior and posterior focal lines in a spherocylindrical lens combination.