| 摘要 |
A method and apparatus for creating an atmospheric electromagnetic radiation path modifying element (40) operative to simulate a physical optical device, the method comprising applying electromagnetic radiation to a selected plurality of three-dimensional portions (12 - Figure 3 ) of an atmospheric volume (10) so as to heat and/or ionise the air within said portions, wherein said selected portions are spatially located together in a substantially unbroken three-dimensional configuration. |
