Optical devices composed of a large amount of width -equation -based parallel slit are called grating. The commonly used grating is made of a large amount of parallel scoring on the glass sheet. The scratch is the opaque part. The smooth part between the two seaches can be transmitted, which is equivalent to a slit. The refined grating is engraved with thousands of or even tens of thousands of scratches in 1cm width. This grating using transmitted light diffraction is called the transmitted grating, as well as the rack diffracted by reflected light spikes between two scarred marks. Noodles can reflect light, and this grating is called reflected grating.

The grating is a technology that combines digital technology and traditional printing, and can show different special effects on special film. Show the lifelike three -dimensional world on the plane, the movie -like smooth animation clips, and the incredible phantom effect. The grating is a thin sheet composed of a strip lens. When we look at it from the side of the lens, we will see the image on a very thin line on the side of the thin tablet, and the position of this line is from the perspective of observation. Decide. If we put this image on different lines, corresponding to the width of each lens, arrange printed on the back of the grating slice according to the sequential branch. When we observe from different angles, we will see different images.