A counting field and size references support microscopic examination of particulate matter. The physical size represented by the marks depends on calibration.
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.
Particle references support microscopic sizing and counting within a defined inspection procedure. Pattern layout, observation magnification and reporting thresholds need to match that procedure.
Choose the pattern for the counting methodThe reticle supplies comparison geometry. Sampling, preparation, blank control and counting rules establish the assay result; a pattern name alone does not demonstrate compliance with a pharmacopoeial method.
Calibrate eyepiece divisions against a stage scaleA counting field and size references support microscopic examination of particulate matter. The physical size represented by the marks depends on calibration.
Define the current method, field diameter and particle-size thresholds. A graticule is an optical aid and does not by itself qualify a pharmaceutical test system.
Sizing circles and reference features support visual comparison. A counting grid only partitions an area. Particle appearance also depends on focus, illumination and the measurement definition, such as projected diameter rather than physical volume.
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.
Counting-field and size-comparison pattern for the specified microscopy method.
Pharmaceutical particle reticles provide size, counting or field references for a specified microscopic assessment.
Match the reference dimensions and field rules to the selected procedure. The pattern name alone does not establish method compliance.
Method, reference sizes, counting layout, microscope configuration, mounting and calibration requirements.
The relevant difference is whether reference dimensions and observation rules match the specified method; a similar-looking pattern is not sufficient.