| 摘要 |
A transmitter (10) for an alignment system in which a field (14) of electromagnetic radiation is propagated in a non-planar reference cone is disclosed. The transmitter (10) includes a chassis (16) with a source (27) fixed to the chassis (16) for providing a beam of electromagnetic radiation and an optical deflector (102, 102 min , 171, 182, 198, 226, 235, 260 or 277) which converges toward the source reflects the beam into an omni-directional cone of radiation (14). A flexible support (105, 105 min , 105 sec , 170, 173, 184, 200, 228, 237 or 267) having an omni-directional stiffness supports the optical deflector (102, 102 min , 171, 182, 198, 226, 235, 260 or 277) in the beam to reflect the reference field (14) in a level orientation when the chassis (16) is level. An angular error in the orientation of the chassis (16) from level results in the optical deflector (102, 102 min , 171, 182, 198, 226, 235, 260 or 277) deviating from the aligned position to maintain the reference field (14) in the level orientation. Damping of the deflector (102, 102 min , 171, 182, 198, 226, 235, 260 or 277) is also provided for and sensors (132, 136, 240, 241 or 242) detect when the angular error of the chassis (16) has exceeded an allowable amount. |
