The eyepiece dividing plate, also known as the eyepiece micrometer, is a surface engraved with different patterns1.5mmA thick optical glass plate that can be installed on the focal plane of a microscope eyepiece. Measuring micrometer with mirror stageS8ThePS8When used in conjunction, it can correctly read the size of the particle sample.

G57It is a type of eyepiece reticle mainly used in the pharmaceutical industry for screening and analyzing particles in samples, and detecting the distribution status of particles. When the diameter of the sample particles is smaller than50µmOr when the number of particles is within a certain range,G57Suitable for particle size analysis.G57The black dots and hollow rings on the dividing board represent the particles, respectively10µmand25µmTwo types can be used as references for comparison with particles. In addition, a horizontal scale with a scale is also integrated into it.

G57Usually used in conjunction with10Objective lens: At this time, the correction factor is1If different magnification lenses are used, the correction factor will change. At this point, the microscope must first be calibrated so that the diameter of the large circle in the final field of view is equal to that on the microscope stage1mm.

The partition board has extremely high requirements for cleanliness, and any small dust will produce large black spots during observation. At the same time, the installation position accuracy of the partition board is extremely high, so it is best not to disassemble it. If it is disassembled, it must be restored to its original state. The diameter of the reticle must match the eyepiece to be used, and the diameter should be slightly smaller than the eyepiece. The internal position of the reticle varies slightly among different eyepieces. The following diagram shows the schematic diagram of the built-in Fresnel eyepiece:

1 If you choose to use10Objective lens, on the reticle10mmThe long scale represents the sample on the stage1mm(10mm/10×=1mm)；

2 If the sample to be tested is long0.050mm, ready to use40If the objective lens is X, it is necessary to select a scale range that includes2mm（0.050mm×40×=2mm）

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