The sharp ring stains exhibited by the
6.0 μm FocalCheck™ fluorescent dark-red ring stained/green throughout microspheres produce a striking visual representation of instrument misalignment or other aberrations making them ideal as reference standards for confocal laser-scanning microscopy. Correct image registration is indicated when the ring image and disk image of the combination beads are perfectly coincident in all dimensions.
See our full collection of microscope calibration reagents ›For Research Use Only. Not for use in diagnostic procedures.