Interference fringe analysis based on centroid detection.
Phase measurement of interference fringes is an integral part of several fields in optics. Using simple straight sinusoidal fringe patterns, we describe the relationship between fringe position or phase to the centroid position when these fringes are incident on a position sensitive detector. With detailed descriptions and some experimental results, we show that a phenomenal sensitivity is possible in principle with what we believe is a new approach of phase measurement, and excellent sensitivity is readily achieved.
Vikram
Chandra S
CS
Conservative Optical Logic Devices Program, Fisk University, 1000 17th Avenue North, Nashville, Tennessee 37208 USA. cvikram@fisk.edu
Caulfield
H John
HJ