AUTOMATIC PRECISION COMPARATOR

An automatic computer-operated precision comparator has been developed and constructed to process single-tier, double-tier, and three-tier s pectrograms and spectrointerferograms obtained on the apparatus of the SP211-SP212 complex with three-tier entrance slits. The comparator ma kes it possible to measure the distances between spectral lines and in terference fringes both in the same and in adjacent spectra with high accuracy; to measure the fractional part of an interference order; and to automate the counting of interference fringes and the calculation of the dispersion of optical materials. (C) 1998 The Optical Society o f America.