| 摘要 |
PCT No. PCT/NL79/00009 Sec. 371 Date Jun. 25, 1980 Sec. 102(e) Date Jun. 25, 1980 PCT Filed Nov. 23, 1979 PCT Pub. No. WO80/01049 PCT Pub. Date May 29, 1980.A polygonal mirror is provided which presents a plurality of mirror surfaces arranged about an axis of rotation with all the mirror surfaces at the same inclination relative to that axis. The mirror comprises a reflecting foil tightened over a plurality of supporting elements arranged about the axis of rotation. Equal angles between the mirror surfaces are obtained by employing cylinders as the supporting elements. The cylinders all have the same outside diameter, and are placed together with each touching two neighboring cylinders and each in contact with a central cylinder the axis of which coincides with the axis of rotation. |
