Application Scope and Maintenance & Cleaning Methods of the Microscope
Metallographic microscopes also use optical imaging principles to magnify and present small objects in front of us through a combination of two lenses. However, their magnification is generally below 1000 times, and 400 times is the most commonly used. At the same time, the optical path of metallographic microscopes is significantly different from that of biological microscopes. In biological microscopes, transmission light imaging is generally used, while the metal and other samples observed by metallographic microscopes are generally opaque, so reflection light imaging is used. Metallographic microscopes are also divided into two types: upright and inverted. Due to the need for measurement and analysis of samples in metallographic observation, the eyepiece of a metallographic microscope has a special type of eyepiece that can be roughly measured, called a micrometer eyepiece. This type of eyepiece is a cross reticle with a scale added to the lens of the eyepiece, thereby achieving simple measurement of the sample. The objectives of metallographic microscopes are also divided into ordinary achromatic objectives and flat field achromatic objectives. Due to the commonly used magnification of 400 times for metallographic microscopes, some microscopes only have a 40x flat field objective lens installed in the calibration line to save costs. In addition, due to the need to analyze and study metal structures, metallographic microscopes with three eyes connected to computers are more commonly used, and professional metallographic analysis software used for these analyses and studies is also a common configuration of metallographic microscopes. However, due to the highly specialized nature of these metallographic analysis software, there are also high professional requirements for users. In addition, some metallographic prototypes and cutting machines used for sample processing are often used together.
As metallographic microscopes are also precision instruments, necessary cleaning work should be carried out after using the microscope, and then placed in the tool cabinet. In addition, it is necessary to regularly clean and maintain the microscope; Pay attention to moisture prevention and moisture release. When cleaning the crucial objective lens and eyepiece, be sure to gently wipe them with a cotton ball. For dirt that is difficult to clean, you can use a cotton ball dipped in a mixture of ethanol and ether (8 and 2 ratios) to gently wipe them. Cotton balls cannot be reused. In addition, when using high magnification immersion lenses, more attention should be paid to cleaning to prevent contamination of other non oil lenses. Nowadays, many microscopes have already undergone good anti mold treatment on the lens itself.
