micrometer is also called objective lens micrometer, or stage micrometer. micrometer is a scale placed on the stage to compare and measure the length, width, area, size, and shape of the object to be observed under the microscope.
The intuitive numerical value obtained by the micrometer compared against the observed object is the actual numerical value of the object observed. Although it has been magnified by the microscope, the measured value does not need to be converted.
In addition to measuring and reading directly under the microscope, the objective micrometer can also be used as a measuring scale to calibrate the results of measurement of the microscope after magnification.
According to different needs, various kinds of scales can be etched on the objective micrometer, such as straight lines, crosses, grids,circles and angles. In general, the minimum standard value of grid can reach 0.01mm, and there are differences of metric systems.
Micrometer has bright field and dark field distinctions, and its measurement method and standards are the same. The bright field is to etch black ruler on transparent glass, suitable for measurement under bright field microscope or bright specimen. The dark field is to etch bright ruler under a dark background, to facilitate observation under a relatively darker field of view and specimens.
