principal point


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prin·ci·pal point

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.

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 point

One of two points so situated that the optical axis is cut by the two principal planes.
See also: point
References in periodicals archive ?
A stable adjustment of the principal point coordinates (interior orientation) requires a rotation of the camera about optical axis (or rotation of the test field).
The port currently handles 700,000 units from a range of global destinations and is the principal point of contact for North American trade but it is thought the new terminal could generate considerable business from the Far East.
Monsanto and Solutia have agreed to the Agency's principal point that Brofiscin Quarry can be added to the list of 'legacy sites' for which Monsanto will assume liability.
The junction also acts as the principal point of structural transition, where eccentric forces are equalised and resolved, and where the bridge is seen at its most light.
It was Casey who instituted most of the policies that characterize the UPS work ethos to this day: hard-working managers who tend to stay with the company for life; well-groomed drivers with neat uniforms who serve as the principal point of contact to the end customer; an open-door, first-name only policy for all employees regardless of rank; and the "UPS way" of doing the job.
The principal point of this decision underscores that we have not only a mora, but a legal obligation to support our parents,'' said Glendalee Scully, a professor of law at McGeorge School of Law in Sacramento.
The rot in the Commonwealth Secretariat goes deep, but the principal point is, and remains, about saving the Commonwealth from itself: That is, for me, a duty any responsible Commonwealth official could not possibly walk away from.
Le principal point a l'ordre du jour a porte sur l'examen des statuts et du budget des Femmes parlementaires du Commonwealth nouvellement constituees.
While the government did not have an institutionalized working group to address trafficking, relevant agencies and NGOs continued to meet on an ad-hoc basis, and a Ministry of Justice official continued to serve as principal point of contact on trafficking cases.
Whatever benefits owners, hirers, and slaves enjoyed within the many ways in which these hiring transactions were made, these were undermined or complicated by the second principal point that Martin makes regarding these practices.
The principal point of contact for administration of the PBL Awards program is Mr.
As the principal point of contact for drug testing programs in high school, college, and professional sports, certified athletic trainers often see the first signs of chemical use among athletes.