FocalCheck™ Microspheres, 15 μm, fluorescent green ring stain/dark red throughout

The sharp ring stains exhibited by the 15 μm FocalCheck™ fluorescent green ring stained/dark red 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.

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