The use of an upright metallographic microscope versus an inverted metallographic microscope
The difference between upright and inverted is simply that the upright sample is placed below, and the inverted sample is placed above. Upright objectives point down, inverted objectives point up.
Inverted metallographic microscope, since the observation surface of the sample coincides with the surface of the workbench downwards, the observation objective lens is located under the workbench, and it is observed upwards. This observation form is not limited by the height of the sample. When preparing the sample, only one observation surface is flat Therefore, it is widely used in factory laboratories, scientific research institutions and colleges. The base of the inverted metallographic microscope has a large supporting area and a low center of gravity, which is safe, stable and reliable. The eyepiece and the supporting surface are inclined at 45°C, making observation comfortable.
The upright metallographic microscope has the same basic functions as the inverted metallographic microscope, except for the analysis and identification of metal samples with a height of 20-30mm, because it conforms to people's daily habits, it is more widely used in transparent, translucent or opaque substance. The upright metallurgical microscope forms a positive image during observation, which brings great convenience to the user's observation and identification. In addition to the analysis and identification of metal samples with a height of 20-30mm, observation targets larger than 3 microns and less than 20 microns, such as cermets, electronic chips, printed circuits, LCD substrates, films, fibers, granular objects, coatings and other materials on the surface The structure and traces can have a good imaging effect.
Maintenance and storage of metallographic microscope stage
According to the requirements of the metallographic microscope, the stage of the metallographic microscope does not need high mechanical strength, but the flatness of the table and the verticality of the axis of the optical system are very high. Otherwise, even if the performance of the objective lens is very good, it will affect the uniformity of the field of view definition. For this reason, it should be avoided to place samples weighing more than 2 kg on the stage, to prevent the stage from being impacted, and not to hit the table with a hammer or other objects to prevent deformation of the table and reduce the performance of the instrument. Place heavy objects on the stage for a long time. When the microscope is not in use, take away the heavy samples to prevent damage to the lifting mechanism. Regularly add an appropriate amount of grease to the moving parts.
When using a metallographic microscope in the cold season, sometimes you feel that the movement of the stage is not flexible enough. This is caused by the cooling and solidification of the lubricating oil or the increase in viscosity. At this time, gasoline can be dropped into the four small holes on the stage. Slowly dissolve the grease in the hole, then take out the stage and the slide plate, clean the oil with gasoline, and replace it with suitable lubricating oil, then this fault can be eliminated.
