| 摘要 |
For a device having first and second, centrally-bored conduits in substantially collinear alignment along a longitudinal axis, the method checks collinearity of the conduits. Each conduit has a discrete inside diameter, and the method comprises directing light through the conduit which has the greatest inside diameter and displaying the light on a planar surface, downstream thereof, as a circular image. Then, light is directed through a second of said conduit create an emerging beam, and displaying the beam on the planar surface to ascertain its central, or offset, impingement relative to the circular image.
|
