| 释义 |
principal point
principal pointThe foot of the perpendicular to the photo plane through the perspective center. Generally determined by intersection of the lines joining opposite collimating or fiducial marks.
principal point
principal point[′prin·sə·pəl ′pȯint] (optics) The intersection of a principal plane with the optical axis. principal pointAs it relates to photography, it is the foot of the perpendicular to the photo plane through the perspective center. Generally, it is determined by the intersection of the lines joining opposite or diagonal collimating or fiducial marks. See also collimating marks.principal point
prin·ci·pal pointone of two points on an optic axis so related that an object at one is exactly imaged at the other without magnification, minification, or inversion.prin·ci·pal point (prin'si-păl poynt) One of two points on an optic axis so related that an object at one is exactly imaged at the other without magnification, minification, or inversion. principal pointOne of two points so situated that the optical axis is cut by the two principal planes.See also: pointFinancialSeePointThesaurusSeepoint |