| 摘要 |
<p>A bearing unit (6) for a measuring part (5) is arranged on one side of the measuring plane (11) or in the measuring plane, and is formed as an air bearing. The measuring part is formed as a C-shaped member with two limbs arranged at right angles to each other. An autocollimator (8) is provided for direction testing. An independent claim is included for a method of testing or calibrating the angular alignment of a device under test.</p> |
