Definition of lenticular term

Viewing angle
The refractive index, pitch and curvature of lenticules define a v-shaped region within which lenticular images could be seen clearly. The angle of such region is named as the viewing angle of lenticular sheet.

Viewing angle is useful as it could tell us whether the lens is suitable for particular effect. Generally speaking, narrow viewing angle is always chosen for 3 dimensional effect whilst the wide one is more suitable for flipping, motion, animation and those dynamic images.

Nevertheless, it does not mean that wide viewing angle lens could not be used for 3 dimensional effect and vice versa. For 3d, the visual impact will be less promising if wrong lens is used. For flip, the wrong choice wil just affect the speed of images change.

The viewing angle of standard 75lpi is around 49 degree.

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