▎ 摘　　要

NOVELTY - The structure has multiple first and second transmission units (100,200) that are arranged disorderly in one surface. An electromagnetic wave incident surface (P1) of the first transmission unit and an electromagnetic wave injection surface (P2) of second transmission unit form an electromagnetic-wave injection surface of the transmission structure. The transmission units are provided with first and second substrates (110,210) having corresponding first and second dielectric blocks (120,220). The thickness of the second substrate between the second dielectric block and an electromagnetic wave incident surface of the second transmission unit is formed as a non-zero thickness. USE - Transmission structure used in a film, a screen of a projection system, and a glass mounted in a vehicle (all claimed). Can also be used in a glass curtain wall of a building and a window windshield. ADVANTAGE - The structure eliminates light pollution caused by inappropriate brightness distribution due to mirror reflection, and makes the wavefront of the transmitted light not to be disturbed, so that people can obtain information by transmitting light. The application structure is featured with a wide working frequency range. The structure avoids the harmful urban light pollution. The wave energy distribution of the transmission side space is made more uniform, thus improving transmission imaging quality. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a preparation method of a transmission structure; a projection system; and a vehicle. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic perspective view of two transmission units. 100First transmission unit 110First substrate 120First dielectric block 200Second transmission unit 210Second substrate 220Second dielectric block P1Electromagnetic wave incident surface of first transmission unit P2Electromagnetic wave incident surface of second transmission unit