The Difference Between Metallographic Microscope and Stereo Microscope
Sound card rack and zoom organization
1. The sound card frame of a metallographic microscope is usually very large, but because metallographic microscopes are used for high magnification testing, they can accommodate samples of generally small sizes. It is generally required that the surface of the sample be relatively flat, and the sample must be prepared, polished, polished, and corroded. In addition to inverted metallographic microscopes, although samples must also be prepared, there are almost no restrictions on the size of the sample. A good inverted metallographic microscope can accommodate more than 10kg of samples. In addition, the zoom structure of the upright metallographic microscope is used to adjust the angle measuring instrument (there are also a few upright optical microscopes and measuring microscopes that use unique accessories to adjust the objective lens), and the inverted metallographic zoom structure is used to adjust the objective lens
2. The specifications of the sound card rack of a stereo microscope are generally small, but if they are moved with a large capacity in coordination, they can inspect samples of different sizes, including products that are immediately inspected on the production line. Therefore, they have very low requirements for samples and do not require professional sample preparation. Only a roughly flat surface is needed for sample preparation. Due to the relatively light weight of the rearview mirror, the zoom method of a stereo microscope generally involves adjusting all the optical path servers.
Increase magnification
1. The magnification of the objective lens of a metallographic microscope is above 1.25 times and below 100 times, while the magnification of the eyepiece lens is between 10X and 20X. Therefore, the total magnification of a metallographic microscope is between 12.5X and 2000 times.
2. The magnification difference of stereomicroscopes is quite large. If it is a general detection stereomicroscope, the magnification is generally between 0.5 to 100 times. If it is a scientific research grade optical microscope, while improving the electron optical quality, increasing the magnification will also increase to around 200 to 400 times.
Lighting path system software
1. Metallographic microscopes generally use a professional refracted light illumination path (as the observed sample is not fully transparent), and the illumination light is directed through a semi reflective dual lens to illuminate the surface of the sample through the objective lens. After the reflection surface returns home, it passes through the objective lens eyepiece and then enters the human eye for three-dimensional imaging. Therefore, the objective lens replaces the function of the spotlight in the Jiumu illumination system software. From a basic principle perspective, this type of lighting belongs to coaxial lighting, where both illuminating light and refracted light are in the same main optical path.
2. Stereoscopic microscopes generally use external light sources, such as halogen headlights on the side for scattered illumination and circular LED lights for illumination. However, these illumination methods are not coaxial illumination. Their illumination light is scattered on the side and has a certain angle of intersection with the main optical axis. The basic principle is somewhat similar to the dark field illumination of metallographic microscopes. In addition, some stereomicroscopes also have coaxial lighting sources, but the coaxial lighting of rearview mirrors has certain limitations. If the design scheme is not reasonable, it will cause glare, which must be removed by adding unique accessories or eyeglass lenses
