| 摘要 |
A wavelength-variable light source is configured to emit a light with a wavelength (X), which is variable within a scan width (”»). An interferometer has a coherent length (”L), which is determinable from (”») and (»). A controller determines an appropriate magnitude of the scan width (”») while a CCD camera captures a fringe image in an exposure time (Te), which is set longer than a time for wavelength scanning. |
