The difference between metallographic microscope and stereomicroscope
Metallographic microscope
Sound card rack and zoom organization
1. The sound card rack of a metallographic microscope is generally very large, but because metallographic microscopes are used for high-power testing, the size of the sample they can place is generally relatively small, and it is generally stipulated that the surface of the sample is relatively flat, and it must be prepared, polished, polished, and etched. In this regard, except for metallographic microscopes, although sample preparation is also necessary, it has almost no limit 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 goniometer (and there are also very few upright optical microscopes and measuring microscopes that use unique accessories to adjust the objective lens), while the inverted metallographic zoom structure is used to adjust the objective lens
2. The specifications of the sound card rack for stereomicroscopes are generally relatively small, but if combined with a large capacity moving sound card rack, it can inspect samples of different specifications and sizes, including immediate inspection of products on the production line. Therefore, it has very low requirements for samples and does not require professional sample preparation. Only the surface of the sample preparation is approximately flat. Due to the relatively light weight of the rearview mirror, the zoom method of the stereoscopic microscope generally involves adjusting all optical path servers.
Body type optical microscope
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 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 stereoscopic microscopes is quite large. If it is a general testing stereoscopic microscope, the magnification is generally between 0.5 and 100 times. If it is a scientific research level optical microscope, while improving the electronic optical quality, 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 shines on the surface of the sample through the objective lens after passing through a semi reflective double light lens. After returning home, the reflection surface is imaged in three-dimensional through the objective lens and then into the human eye. Therefore, the objective lens replaces the function of the condenser in the Jiumu lighting system software. From a fundamental perspective, this type of lighting belongs to coaxial lighting, where both illuminating and refracting light are in the same main optical path.
2. Stereoscopic microscopes generally use external light sources, such as halogen headlights scattered on the side for illumination and circular LED lights for illumination. However, these lighting methods are not coaxial illumination, and their illumination light is scattered on the side at a certain angle with the main optical axis. The basic principle is similar to the dark field illumination of metallographic microscopes. In addition, some stereoscopic microscopes also have coaxial lighting sources, but the coaxial lighting of the rearview mirror has certain limitations. If the design scheme is not reasonable, it can cause glare, which must be removed by adding unique accessories or eyeglass lenses
