| 摘要 |
The method of determining the length of the unique chord defined by the unique accepting angle comprises the steps of radiating light from a point source positioned on the plane of projection onto the lenticular screen, and then locating a first spot on the plane of projection and along a first axis parallel to the direction of the lenticulas from which first spot the light reflected by the lenticular screen appears brightest. It then involves locating a second spot on the plane of projection and along a second axis perpendicular to the direction of the lenticulas from which second spot the light reflected by the lenticular screen appears brightest once again by moving away from the first spot along the second axis so that the light reflected by the lenticular screen appears darker. The distance between the centre of the first spot and the centre of the second spot being the length of the unique chord defined by the unique accepting angle on the plane of projection. |
