| 摘要 |
PCT No. PCT/FR97/00745 Sec. 371 Date Oct. 23, 1998 Sec. 102(e) Date Oct. 23, 1998 PCT Filed Apr. 25, 1997 PCT Pub. No. WO97/39944 PCT Pub. Date Oct. 30, 1997A stratospheric balloon comprising on the one hand an external flexible envelope (1) having a natural shape and made of transparent synthetic material and presenting an air inlet and, on the other hand, an internal screen (2) made of visible and infrared energy collecting material and having the shape of a surface generated by a mobile generatrix parallel to the longitudinal symmetry axis of the external envelope. The internal shield is connected to the envelope (1) by attachments arranged at the upper part of the envelope at a distance from the longitudinal axis of the latter, and extending longitudinally freely inside the envelope (1) without contacting it.
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