Abstract
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.
Original language | English |
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Pages (from-to) | 692-695 |
Number of pages | 4 |
Journal | Proceedings of SPIE - the International Society for Optical Engineering |
Volume | 4185 |
Publication status | Published - 2000 |
Event | 14th International Conference on Optical Fiber Sensors - Venice, Italy Duration: 11 Oct 2000 → 13 Oct 2000 |