Metallographic microscope adjustment method、
Metallographic microscope is a perfect combination of optical microscope technology, photoelectric conversion technology, and computer image processing technology to develop into a high-tech product, which can easily observe metallographic images with computers, and metallographic atlases, ratings, output Graphics, printing, etc. As we all know, alloy composition, heat treatment...
Metallographic microscope is a perfect combination of optical microscope technology, photoelectric conversion technology, and computer image processing technology to develop into a high-tech product, which can easily observe metallographic images with computers, and metallographic atlases, ratings, output Graphics, printing, etc. As we all know, the alloy composition, heat treatment, and hot and cold processing technology directly affect the change of the internal mechanism structure of the metal material, so that the mechanical properties of the part change. Therefore, it has become an important means of industrial production to observe and inspect the internal mechanism structure of metal by analyzing metallographic microscope. So what is the method of adjusting and using the metallographic microscope? The following editor will introduce it to you.
Metallographic microscope adjustment method:
1. 10x objective adjustment
In the application process of the metallographic microscope, the 10x objective lens is the standard common objective lens in the focusing work. At first, it is from a 10x objective lens to a lower magnification objective lens, or, changing from a 10x objective lens to a higher magnification objective lens, there will be no drastic change. Another point is that the depth of focus of the lower magnification objective lens is long, and the observer's naked eyesight is not in the center at will, and the contact between the sample and the lens may occur easily when switching directly to the high magnification objective lens.
The 10x objective lens is not only a standard common objective lens in focusing work, but also involves a lot in practical work. For example, in many relevant national standards for metallographic inspection, it is the most common to compare reference standard spectra under the condition of 100 times observation, and the acquisition of 100 times comes from 10 times objective lens and 10 times eyepiece. Starting from the theoretical control, as long as it is not random or malicious, the subsequent control action should be to make the objective lens near the focal plane. Under the condition of 10x objective lens, after the sample is placed correctly, there should be a blurred image, or even a relatively clear image. , just a little maintenance and fine-tuning.
2. Relevant entry and exit
On the issue of focusing after switching from a low-magnification objective lens to a high-magnification objective lens, due to the improvement of the current microscope manufacturing process, the parfocal performance of different microscope objective lenses is relatively good, especially for overseas products. When observing, sometimes you don’t need to refocus again. The image is already very clear; maybe, just increase the object distance slightly, and the degree of adjustment is definitely not the concept of 1~3 circles, that is, the concept of 1~3 degrees (angle), which is extremely complicated. quantity.
3. About the objective lens converter
When changing the objective lens, do not push the objective lens directly by hand, otherwise it is easy to cause the screw thread of the strong objective lens to become loose and make the optical axis tilt. The objective lens of the microscope and the microscopic digital camera system are screwed on the objective lens converter. When changing different objective lenses, change the objective lens converter until the ears hear a slight "click" sound and feel the resistance increase sharply. At this time, the objective lens is in the normal working position: perpendicular to the plane of the stage.
The above content is an introduction to the adjustment and use of metallographic microscopes. Metallographic microscopes are specially used to observe opaque objects such as metals and minerals. These opaque objects cannot be observed in ordinary transmitted light microscopes. The main difference between metallographic microscopes and ordinary microscopes is that The former is illuminated with reflected light, while the latter is illuminated with transmitted light. In a metallographic microscope, the illumination beam is projected from the direction of the objective lens to the surface of the object to be observed, reflected by the object surface and then returned to the objective lens for imaging. This reflected lighting method is also widely used in the detection of integrated circuit silicon wafers.
