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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers
Photonics Dictionary

optical staining

With respect to microscopy, also called dispersive staining, optical staining the projection of colors through areas of a colorless specimen by color filters that are constructed to fit over the condenser lens. This technique requires no physical dyes or stains, and allows one to characterize the unknown specimen by its dispersive properties that the color projection creates.
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