9 Optical instruments for measuring a reaction by monitoring changes in the reflection of light, namely, interferometers; imaging instruments for use in the study of biomolecules, including proteins, ligands, and nucleic acids, for research purposes; laboratory instruments in the nature of interferometers for use in collecting real-time measurements to support the analysis of biological molecules at different stages of therapeutic development; probes for scientific, research, or diagnostic purposes, not for medical use; probes to which biomolecules bind over the course of a scientific, research, or diagnostic procedure, not for medical use; interferometric sensors; probes to which biomolecules bind during a scientific, research, or diagnostic procedure, not for medical use; probes for scientific purposes, namely, label-free analysis of assays; regenerable probes for use in multiple scientific, research, or diagnostic procedures, not for medical use