Micrometer Glass Slide for Microscope Calibration, especially useful for image analysis system calibration. This slide has 6 round spots of different diameters: 10um, 50um, 100um, 1000um, 5,000um and 10,000um.

Also known as a Stage Graticule Slide. Suitable for use with both transmitted and reflected light microscopes (and macro systems).  The scale is a silvered material that can be viewed as a silhouette with transmitted light or as a reflective white scale under reflected/incident light.​​​​​​​

Micrometer Slides also known as Stage Graticules and Calibration Slides are slides with scales etched or printed on them.  The scales come in a huge variety of sizes, subdivision accuracies and patterns.  These slides are used to calibrate microscopes so measurements can be made.  Reticles are similar scales placed in eyepieces.  Both are used for measurement and counting.