We describe an extension of the active homodyne feedback technique in order to produce stabilized, p/2 radian phase steps in a full-field interferometer used to project interference fringes onto a test-object and hence to measure its shape. The phase stability and accuracy of each step was measured to be 17 milliradians in a 50 Hz bandwidth.
|Number of pages
|Proceedings of SPIE - the International Society for Optical Engineering
|Published - 2000
|14th International Conference on Optical Fiber Sensors - Venice, Italy
Duration: 11 Oct 2000 → 13 Oct 2000