offense against the sine condition

offense against the sine condition

[ə′fens ə′genstthə ′sīn kən‚dish·ən]
(optics)
A numerical measure of coma, equal to the sagittal coma divided by the perpendicular distance from the image point to the optical axis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.