| 摘要 |
PCT No. PCT/BE90/00059 Sec. 371 Date Mar. 9, 1992 Sec. 102(e) Date Mar. 9, 1992 PCT Filed Oct. 16, 1990 PCT Pub. No. WO91/19157 PCT Pub. Date Dec. 12, 1991.The laser generator (20) is mounted in a sleeve (13) in such a way that its barrel (22) is held by three support elements (25,25',30) two of which consist of a sliding part (25,25') having a bearing surface (24,24') extending in an oblique plane with respect to the axial plane which is perpendicular to the radial direction of the support element in question, while the oblique bearing surface (24,24') of each sliding part coacts with a rib (23) projecting from the outer surface of the barrel (22) of said laser generator (20). The side of the sliding part (25,25'), which is opposite the above mentioned bearing surface having a thread (26,26'), engages a thread formed on the inner surface of a ring (28,29) so that the rotation of the ring (28,29) moves the sliding part (25,25') along the axis of the sleeve (13) in a direction parallel thereto, while the above mentioned oblique bearing surface (24,24') moves the axis of the laser generator barrel (22) in a direction parallel to the radial direction in question.
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