| 摘要 |
PCT No. PCT/GB91/00581 Sec. 371 Date Jan. 21, 1992 Sec. 102(e) Date Jan. 21, 1992 PCT Filed Apr. 12, 1991 PCT Pub. No. WO91/16735 PCT Pub. Date Oct. 31, 1991.A reflector (3) may be mounted in a hollow housing (2) adapted to fly in ambient air. The reflector device (3) may be formed from a coating on the surfaces of blocks, the coating being metal or dielectric. Reflecting surfaces whether self supporting or not may be formed as intersecting circles or polygonal (more than four sides). They may be suspended in housing (2) adapted to fly either directly or indirectly by means of an intermediate body within the housing. |
