| 摘要 |
<p>An electronic level which is arranged to receive reflected light from a pattern marked on a staff (5) and to determine the height of the sighting position and the distance to the staff, comprises an electronic level main unit (2), a sighting optical system (15) accommodated in the electronic level main unit (2) for sighting the staff (5) and a sighting device (3) provided on an upper surface of the electronic level main unit (2). The sighting device (3) can be sighted in at least in two directions, and the angle (¸) formed by the two directions is equal to or approximately equal to the field angle of the sighting optical system (5).</p> |
