Laser beam could be applied to act in optical media, to build different spatial images. The operation could be made direct by copying an image or through a C.D. The successive points could be realized with relatively high speed, like 103-105 points per second. Each point represents practically a machining operation done by the laser beam. In most cases, energy transfer is made not in a plane, but in a volume, and this requires moving the focal point in positions required by the image we want to create. This is a sequentially operation, made point by point following a definite order, but in the same time, because the image is spatially, we have to adapt also other parameters of the optical system, for each considered point. The energy required for each point of the image must be the same, because all the micro spheres representing a “point” of the image must have the same volume. In this way we could realize a coherent spatial image. From the experimental research we made, we have learnt that is important to build a model for the energy transfer to optical media, in order to have a good quality for the work we have to do.