US 11,885,980 B2
Suspension projection device based on reflection modulation type metasurface
Zhongwei Jin, Hangzhou (CN); and Shengtao Mei, Hangzhou (CN)
Filed by Zhongwei Jin, Hangzhou (CN); and Shengtao Mei, Hangzhou (CN)
Filed on Sep. 24, 2021, as Appl. No. 17/484,114.
Claims priority of application No. 202011441366.4 (CN), filed on Dec. 8, 2020.
Prior Publication US 2022/0179124 A1, Jun. 9, 2022
Int. Cl. G02B 3/08 (2006.01); G03B 21/28 (2006.01); G02B 1/00 (2006.01)
CPC G02B 3/08 (2013.01) [G03B 21/28 (2013.01); G02B 1/002 (2013.01)] 6 Claims
OG exemplary drawing
 
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.