The grating mainly includes two types: slit grating and cylindrical grating. The slit grating, that is, the linear grating is the earliest mature grating, and its imaging principle is the principle of pinhole imaging. Because this kind of grating is relatively easy to manufacture, the technical difficulty is not great, so a decade ago, there was a very beautiful large-slit grating stereo light box advertisement. Nowadays, some three-dimensional production companies are still willing to participate in the exhibition with the slit grating stereo light box. The effect is good, but the slit grating stereo light box has the following defects: the light transmittance is only 20-30%, it is not environmentally friendly, it is not energy-saving, and the lighting lamp consumes more energy. Large, hot, and insufficient outdoor brightness, only suitable for indoor use.

There are two kinds of lenticular gratings, mainly plate and mould. The imaging principle is the principle of refracting and reflecting of curved lens. The efficiency of the lenticular grating is large, and it can be used indoors and outdoors without lighting. The market penetration rate is expanding. Grating film was once popular for a while because of its price competitiveness. However, due to the gradual decline in the price of the lenticular grating plate and the need for the film to be pasted and the technology to be improved, its competitiveness has not been prominent.