| 摘要 |
PCT No. PCT/CH91/00260 Sec. 371 Date Sep. 24, 1992 Sec. 102(e) Date Sep. 24, 1992 PCT Filed Dec. 10, 1991 PCT Pub. No. WO92/10776 PCT Pub. Date Jun. 25, 1992.A double reflector is described which comprises two spaced apart primary mirrors oriented toward a common focus. The optical system further comprises two separate secondary deflector mirrors as well as tertiary deflector mirrors for beam concentration on a common focus. Both the primary mirrors and the secondary deflector mirrors are so-called off-axis reflectors, i.e. their surface represent surface sectors of a hypothetical big aspherical mirror body. As surface sectors of a hypothetical big hyperbolic mirror, the primary mirrors are inclined at an angle with respect to the common optical axis and each disposed at a given spacing from the same in such manner that the inner marginal rays of the incident radiation which are closest to the optical axis, will converge. The primary mirrors of over 8 meters in diameter are composed of individual segments which are coupled to corresponding segments of the secondary deflector mirror, which are located opposite them in the beam path, by way of a high-precision computer assisted measuring system such that each deviation of the primary mirror segments in their bearing position is responded to with a corrective movement of the respective opposite segments of the secondary deflector mirror, carried out in real time by way of actuators. |
