A theoretical analysis of the fringe pattern produced by a capillary tube interferometer is presented, which is expected to be two-beam interference, and a computer program to simulate the interference fringe pattern is established. By comparing the simulated fringe pattern and the experimental fringe pattern, the refractive index of the liquid can be given when the two fringes coincide best. The results of this method are close to those of the Abbe refractometer.
© 2006 Optical Society of America
Original Manuscript: February 9, 2006
Revised Manuscript: May 12, 2006
Manuscript Accepted: May 16, 2006
Vol. 1, Iss. 12 Virtual Journal for Biomedical Optics
Ailing Yang, Wendong Li, Guang Yuan, Junyu Dong, and Jinliang Zhang, "Measuring the refractive indices of liquids with a capillary tube interferometer," Appl. Opt. 45, 7993-7998 (2006)