Optical device and method for obtaining reference planes, especially for hand-held tools

摘要

PCT No. PCT/SE94/00286 Sec. 371 Date Sep. 29, 1995 Sec. 102(e) Date Sep. 29, 1995 PCT Filed Mar. 29, 1994 PCT Pub. No. WO94/22624 PCT Pub. Date Oct. 13, 1994Method of direction control consisting in producing one or more parallel reference lines (7,8) that may be manipulated in such a way that their directions become parallel to the intended direction and with the help of plane mirrors making images (9,10) of the reference lines and images (12,13) of the object the straightening up of which is to be controlled. Implement for use at the method.