| 摘要 |
<p>A laser-based alignment system and method uses a beam of light in the green portion of the optical spectrum as a reference position. A laser transmitter (100) generates either a stationary (102) or rotating (104) green beam of light along a predetermined reference line or plane. The laser transmitter (100) may include a frequency-doubled, solid-state laser, a gas laser such as green HeNe, or a semiconductor green laser diode. The reference beam green of light may be viewed directly on objects to be positioned or on an appropriately designed optical target. The optical target detects and displays the location of the beam of green light with respect to the target. Preferably, the optical target enhances the contrast of the green reference beam of light against ambient light.</p> |
