Applications and maintenance techniques for microscopes
A microscope is a tool that can magnify tiny objects. Today, it has been widely used in teaching, medical, food, manufacturing and other industries. Optical microscopes can be mainly divided into two categories, one is biological microscopes that are commonly used in teaching and medical fields, and the other is widely used in metallurgy, mining, and electronics industries. Metallographic microscopes for observing and studying metal structures, mineral structures, circuit boards, surface coatings and particles, etc.
Metallographic microscopes also use the principle of optical imaging to magnify tiny objects in front of us through the combination of two lenses, but its general magnification is below 1000 times, and 400 times is the most commonly used. At the same time, the optical path of the metallographic microscope is also very different from that of the biological microscope. In the biological microscope, the transmitted light imaging is generally used, while the samples such as metals observed by the metallographic microscope are generally opaque, so the reflected light imaging is used. Metallographic microscopes are also divided into two types: upright and inverted. Since the metallographic observation often needs to measure and analyze the sample, the eyepiece of the metallographic microscope has a special kind of eyepiece that can be roughly measured, called the micrometer eyepiece. This kind of eyepiece is to add a cross reticle with scale in the lens of the eyepiece, so as to realize the simple measurement of the sample. The objective lens of the metallographic microscope is also divided into ordinary achromatic objective lens and plan achromatic objective lens. Since the commonly used magnification of metallographic microscopes is generally 400 times, some metallographic microscopes are only equipped with a 40 times flat-field objective lens in the standard configuration in order to save costs. In addition, because metallographic microscopes need to analyze and research some metal structures, metallographic microscopes with trinoculars connected to computers are more commonly used, and professional metallographic analysis software for these analyzes and researches is also a common configuration of metallographic microscopes. However, since these metallographic analysis software are very professional, the professional requirements for users are also very high. In addition, there are also some equipment such as metallographic sample preparation machine and polishing machine for processing samples, which are often used together.
Since the metallographic microscope is also a precision instrument, after using the microscope, the necessary cleaning work should be carried out, and then put into the tool cabinet. In addition, the microscope should be cleaned and maintained regularly; pay attention to moisture-proof and dehumidification. For the most critical objective lens and eyepiece, be sure to wipe it gently with a cotton ball. For the dirt that is difficult to clean, you can use a cotton ball dipped in some ethanol and yi ether (8 and 2 ratio) to gently wipe it. Cotton balls cannot be reused. In addition, after using an oil-immersion objective lens with too high a magnification, pay more attention to cleaning to prevent contamination of other non-oil lenses. Many microscopes have already done a good anti-mold treatment on the lens itself.
