Positioning simple optical lenses at specific locations, two pairs of lenses with different focal lengths could refract the light passing through their centers. This would not interfere with the normal visibility of the background, only the white mouse close to the lenses would become invisible.
This was the simplest form of optical invisibility, although the method had significant limitations. Whether in setting the distance and focal lengths of the lenses, or the angle and position of the audience seating, Jiang Shu conducted many experiments to ensure the mouse's invisibility and to make sure the audience wouldn't pay too much attention to it.
The principle of the invisibility cloak…
As Jiang Shu said, there was nothing much to say about this part of invisibility.
