| 摘要 |
The method consists (a) in decreasing the angular value of the apparent diameter of the light source seen by a refractive or reflecting lenticular element, in order that the rays reaching each lenticular element may be considered as parallel, this decrease being restricted to a controlled value depending on the constant of the optical surface considered as a diffraction network and (b) in decreasing as considerably as possible the distance between the diopters constituting an orientation optical system of the lightrays and the points of composite images receiving the said light rays. The invention is applicable to relief photography and cinematography. It improves the direct vision of relief slides and films. |
