Ocular Micrometer (Eyepiece Graticule)

An ocular micrometer, also called an eyepiece graticule, provides a reference scale within a compatible microscope eyepiece for measuring specimen dimensions after calibration against a stage micrometer.

For microscopy practicals and research observations, a calibrated eyepiece scale helps you record specimen sizes rather than relying on visual estimates. Match the graticule to your eyepiece before purchase.

Listed product details

• Type: ocular micrometer / eyepiece graticule.
• Construction: glass disc with a marked linear scale, as listed.
• Scale: described in the existing listing as 100 divisions; confirm the supplied scale pattern.
• Applications: calibrated specimen measurement in teaching and research microscopy where the equipment meets the task's requirements.

Fit and calibration

The earlier description mentions common diameters of 19, 21, 23 and 26 mm. These are not selectable size variants in this listing and do not establish the diameter supplied. Confirm the actual disc diameter, thickness and eyepiece mounting requirements before ordering.

Calibrate against a stage micrometer for each objective and optical configuration used. Ocular scale divisions do not have a fixed specimen-length value without calibration. Confirm whether a stage micrometer is included; inclusion is not documented.

Specifications and care

Manufacturer, scale tolerance, calibration certification and scratch-resistance rating are not supplied. No particular measurement accuracy is guaranteed by the listing. Follow the microscope manufacturer's instructions for installation and optical cleaning, and protect the scale surface from scratches, dust and fingerprints.