CPC G02B 3/08 (2013.01) [G03B 21/28 (2013.01); G02B 1/002 (2013.01)] | 6 Claims |
1. A suspension projection device based on a reflection modulation type metasurface, comprising a metasurface, wherein a cubic column array is machined on one side of the metasurface, the cross section of a cubic column in the cubic column array is a square, the side length of the square ranges from 10 to 500 μm, and the height of the cubic column ranges from 50 to 800 μm; and
incident light enters from one end of the cubic column, is totally reflected in the cubic column, and exits from the other end of the cubic column.
|