Low-coherence lock-in interferometer for ophthalmology

A. C. Oliveira, F. M. M. Yasuoka, J. B. Santos, L. A. V. Carvalho, J. C. Castro
1998 Review of Scientific Instruments  
The measurement of short distances by interferometry using low coherence light is a potential option in the study of interfaces between intraocular elements. In this article we describe an experimental device to measure the distance between such interfaces in vitro. The procedure utilizes a Michelson interferometer to generate the probe beams together with a silicate photodetector system and a lock-in synchronous amplifier. The cornea and crystalline lens thickness of a rabbit eyeball are
more » ... t eyeball are evaluated, as well as the human cornea in preservative solution. These tests indicate the method to be efficient, easy-to-handle, of high resolution and to present a signal-to-noise ratio of up to 12. We consider the possibility of its use in obtaining information about the degeneration of intraocular structures during the preservation process.
doi:10.1063/1.1148867 fatcat:dv5trklrafdo5bxoa53nvalqbe