| 摘要 |
<p>Method of and apparatus for measuring the width of an object. The object (26) is moved across a first beam (18) and a photodetector (36) produces a signal indicating when the object is eclipsing the beam. An interferometer (14) is trained on a device for moving the object across the beam and is used to calculate the distance the moving device travels while the object is eclipsing the beam. From that distance, the width of an object can be calculated.</p> |
