A circular counting field with reference marks supports the dimensional decisions used in fibre-counting methods. Pattern variants have different reference details.
Specify optical glass or fused silica, overall dimensions, thickness, pattern-side orientation and the clear aperture. Define transmission, reflectance or optical density at the working wavelength when optical contrast is critical.
The circular boundary and reference marks support the chosen fibre-counting method. The actual field diameter at the specimen is calibrated with the microscope, rather than taken from the glass pattern alone.
Calibrate eyepiece divisions against a stage scaleBoundary, fibre length and width criteria determine inclusion in a count. Different Walton–Beckett pattern versions should be selected by the method, rather than by visual similarity.
Choose the pattern for the counting methodA circular counting field with reference marks supports the dimensional decisions used in fibre-counting methods. Pattern variants have different reference details.
Choose this family for a fibre-counting procedure that explicitly uses a Walton–Beckett field, with calibration at the actual microscope magnification.
A Walton–Beckett graticule defines a counting field for a particular fibre-counting method. It differs from an unrestricted square grid; the specimen-plane field must be calibrated for the microscope used.
Line geometry, graduations, labels, field diameter, substrate thickness and mounting outline can be matched to the instrument. Contrast and line density should allow the reference and the specimen to remain visible together.
A patterned glass reference component with the selected graduations, outline and mounting dimensions, accompanied by the specified inspection records.
Circular reference fields for compatible fibre-counting methods.
Method-specific fibre counting fields and comparison marks.
Walton–Beckett graticules provide a defined circular field and comparison marks for microscopic fibre counting.
Match the pattern to the counting method, objective and calibrated field. Use the same boundary and sampling rules throughout the assessment.
Counting method, field diameter, comparison marks, magnification, mounting size and calibration needs.
First verify field dimensions and optical conditions on the actual microscope, then apply the counting rules of the specified method.