Definition of lenticular term

Viewing distance
It is the distance from which the lenticular image will be viewed. The estimation is important as it determines which kind of lenticular sheet shall be used as different lpi, say lens per inch, of lenticular sheet will have different optimal viewing distance from which the images could be seen clearly.

In general, the figure of lpi and optimal viewing distance is inversely related. In other words, the higher the lpi, the shorter the optimal viewing distance will be and vice versa.

The optimal viewing distance of standard 75lpi is around 0.15-1.8M whereas the viewing distance of lower lpi of 50 is up to 1-5M. Thus, the former is used for hand-held piece and the latter is mostly used for large format poster.

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