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Reticle 21mm 1x Microscope Calibration, Metric Microscope Calibration Reticles are generally inserted in the optical path of a Microscope between the the Microscope Objective and t he Eyepiece. These reticles are scaled to match the power of the Objective, thus providing direct reading of the part to be measured. The accuracy of the measurement will be a function of both the true magnification of the Microscope Objective and the Calibration Reticle.The 1X Microscope Calibration Reticle can be used with a magnifier or 1X objective for direct reading measurements.The 1X calibration reticle is useful for linear measurements and has an overall accuracy of 1μ over the 10mm length. The pattern is Low Reflection Chrome looking through the substrate. The substrate is 1.5mm thick stable optical quality glass.To qualify the combination of Microscope Objective and Calibration Reticle use the .001"/.25mm division MicroRule or Microscale and compare the readings between the direct reading Microrule or Microscale and the projected image of the Microscope Calibration Reticle. Click here to download drawing 21mm Compatibility Chart Full Compatibility Chart Show more