The phrase "reference sphere" is correct and can be used in written English.
It refers to a context or framework that is used for comparison or evaluation. Example: In the field of economics, the free market is often seen as the reference sphere for measuring the success of government intervention in the economy.
The induced probing error in the normal direction of the reference sphere is calculated by considering the error motions in the coordinate transformation.
The partial derivatives ∂OPD/∂x0 and ∂OPD/∂y0 represent respectively the components of the slope of the wave relative to the reference sphere at any particular point (x0, y0).
General relations for the calculation of wave aberration, ray aberrations and the influence of change of radius of the reference sphere on the wave aberration of a normal to aspherical surface are derived.
Our work presents an analysis of optimal values of correction zones and an optimal position of the center of the reference sphere based on the variance of wave aberration for the image quality evaluation.
In particular, we show how two different frameworks can be combined: one for the general setting, and one dedicated to the case where all the objects handled lie on a reference sphere.
b Geometrical location of the stylus receiver to the titanium reference sphere.
A new method, i.e. intersecting chord method, is proposed to solve the problem of constructing 3 + 2 and 2 + 3 models of the minimum zone reference spheres (MZSP).
Fig. 3 3D craniofacial model with reference spheres.
Figure 4a,c shows the reference spheres, and Figure 4b,d shows the projection planes.
Following the measurements of the three reference spheres, mixed-reality simulation was started.
Kuhr et al. [21] developed a new method of measuring the trueness of full-arch intraoral scans using reference spheres.
