nodal point


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no·dal point

one of two points in a compound optic system so related that a ray directed toward the first point will appear to have passed through the second point parallel to its original direction.
Synonym(s): axial point

no·dal point

(nō'dăl poynt)
One of two points in a compound optic system so related that a ray directed toward the first point will appear to have passed through the second point parallel to its original direction.
Synonym(s): axial point.

nodal point

Either of a pair of points situated on the axis of an optical system so that any incident ray sent through one will produce a parallel emergent ray sent through the other.
See also: point
References in periodicals archive ?
The distance between leveling network nodal points and GNSS permanent stations is not a constant value.
The dimensional value of preconsolidation stress at the jth nodal point, [S.sub.pcj], can be calculated by the following equation:
If this condition is not satisfied the robot can't reach any nodal point. In the next section the most significant simulation results would be considered.
Rather than advertising the product, the advertisement highlights women's role in the unification of the family (nodal point: 'reinforcing the behavioral codes traditionally associated with gender').
The second nodal point in FF's discourse on feminist politics is 'experience of oppression'.
But I would think there should be a nodal point within the government, which has the ability to take a decision and invest, otherwise there could be transmission losses, "said Kamath.
As this article is concerned with identity and the nation, it will draw upon their discourse theory and the 'nodal point' to consider the politicisation of content in commercial programs.
In this case the remedy that the SMS advocates, in terms of social and material form, is one that will facilitate a particular type of social interaction and economic activity at some undefined future moment; an unknown temporal nodal point that will come to mark 'urban progress'.
Here the sample point [x.sub.I] may be a nodal point under consideration or a quadrature point.
Discrete analysis is based on the equilibrium of the balanced condition composed for every nodal point of the cable.
It is a nodal point receiving feedback through various access mechanisms and coordinating 24x7 assistance on any sales/ service/ product issues and spares parts availability to all customers across India.
The KFSC chief said the International Union of Police Academies would extend all possible help "to boost relations among security education institutions, introduce innovative police training programs and promote the exchange of information and expertise." He said the KFSC, which is the main educational institution in Saudi Arabia that teaches security and criminal sciences, will serve as the nodal point on behalf of the Kingdom.