Viewing angle dependence reduction

Reduction of the viewing angle dependence by the multi-domain mode... 

In Fig. 8.22a, the crush ribs are illustrated in a side cross-sectional view. The crush ribs are not in section and are located at the top and bottom of the cap tapering inward from the open end. As the shaft is pressed into the cap, it encounters the ribs with increasing force until it bottoms and the cap is fully emplaced on the shaft. The point of first contact and the amount of final interference depends on the actual sizes of the two parts. However, the ability of the ribs to crush over permits wider tolerances on their mating dimensions. The amoimt of taper varies with the application. However, the author usually begins trials with a 2° angle/side which results in reduction in the diameter of 0.035 in per side over a 1-in depth. 

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