Uncertainty Analysis of Measurement Result of Stereo Microscope Magnification Difference
Stereo microscope has two sets of the same complete imaging optical path, observes objects from different angles and sides, and enlarges the tissue structure that cannot be clearly observed with the naked eye through the optical amplification system to obtain a clear image with stereoscopic feeling. kind of instrument. Its structure is mainly composed of eyepiece, objective lens, stage and optical parts. The characteristics are: large field of view diameter and large depth of focus, which is convenient for observing all layers of the detected object. Although the magnification rate is not very high, the working distance is very long, and it seems to be upright, which is convenient for operating the detected object. It is mainly used to study the surface phenomena and organizational structure of various tiny objects, and can also measure the geometric dimensions of tiny objects. In the application of the electronics industry, it is used as an operation tool such as solder joint inspection, used for the observation, assembly, inspection of integrated circuits, etc., used for the inspection of raw materials and cotton wool fabrics in the textile industry, and used for working process in the manufacture of small precision parts. Observation, measurement, inspection and assembly of precision parts, used for surface quality of lenses, prisms or other transparent substances in optical processing, and quality inspection of precision scales, also widely used in medicine, materials science, mineralogy, archaeology, Research in geology, zoology and botany, and forensic identification.
Measurement methods
Install the eyepiece with a reticle on the stereo microscope, place the micrometer vertically at the center of the object plane of the microscope under inspection, adjust the focus on the micrometer, find the image of the micrometer in the microscope, and make the first point of the image According to the scale on the eyepiece reticle, read the value L 1 of the tail end of the glass line scale image on the eyepiece scale line, according to the value used by the glass line scale The distance L between the two reticle lines and the magnification 0 can be used to calculate the magnification difference according to the formula.
