principal axis


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Related to principal axis: centre of curvature

principal axis

In optics, a line that passes through the optical center or nodal point of a lens perpendicular to the surface of the lens.
See also: axis
References in periodicals archive ?
339 * Abbreviations in parentheses reflect scales that items were originally constructed to comprise: (a) EQ = Existential Questions; (b) OC = Openness to Change; and (c) DP = Doubting as Positive Table 2 Principal Axis Factor Analysis of Spirituality Scales Scale Factor 1 Factor 2 Religious Well-Being .
To accurately plot visual fields, the relative positions of each eye must be known, therefore the principal axis must be determined relative to both its frontal and sagittal planes.
Instead, I used exploratory principal component and iterated principal axis (factor) latent variable extractions, followed by both varimax (orthogonal) and direct oblimin (oblique; gamma = 0) rotations.
Sample sizes and generalized genetic distances of bottlenecked lines from the ancestor over the five bottleneck episodes, subdivided into that portion attributable to the first principal axis (size) and the sum over the remaining principal axes (shape).
Guo, "Negative refraction in an anisotropic metamaterial with a rotation angle between the principal axis and the planar interface," Progress In Electromagnetics Research, Vol.
The principal normal stresses and maximum shear stress together with the angle of the principal axis can be determined from the applied stresses (fx, fy and fs) using the following equations [Bruhn, 1973], [Niu, 2005]:
Marking the principal axis that sweeps along the length of the building between north and south entrances, a disappointing 2m high screen divides foyer from secure areas.
The principal Axis I diagnoses for this group included Conduct Disorder (4), Oppositional Defiant Disorder (3), and Post Traumatic Stress Disorder (7).
The principal axis procedure was used with orthogonal varimax rotation.
In the case of a pure tensile mechanism which has two equal eigenvalues having the same sign and a third eigenvalue of same sign but approximately three times as large, only the confidence area of principal axis which corresponds to the dominant eigenvalue (T axis) is fixed.
Loadings on principal axis one Morphologic measurement Total Male Female Thigh length 0.
The principal Axis I diagnoses for this group included Conduct Disorder (2), Oppositional Defiant Disorder (4), and Post Traumatic Stress Disorder (4).

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