Teach you how to choose a suitable microscope
Microscopes have become the most versatile analytical instruments in laboratories and research and development, but for professionals who regularly use microscopes, how to easily purchase a microscope that meets their scientific needs and is cost-effective is a headache. In the past, many users were only able to consult with us when they consulted us. However, there is not much knowledge about the purchase of microscopes. The technicians of Yunfei Company summarized the microscope purchasers based on years of consulting experience. Some of the most common problems before purchasing a microscope, I hope to help you with your selection.
Question 1. How is the price of a microscope formed?
Many microscope buyers have asked us such a question, "How much is the microscope?" or "How much is the XXX model microscope?" In general, our answer will be "What configuration do you need?", or if you I just want to get a general idea of ​​the price of the microscope. It is estimated that we will only give a fuzzy price segment with a very large spread. The result of this is the key reason for the configuration of the microscope. In fact, buying a microscope is very similar to buying a computer - everything needs to be configured according to your requirements. For example, you need several observation modes (the number of objective lenses), whether you need software, whether you need CCD, etc. These requirements greatly affect the price of the microscope. It is important to know that the most important and valuable convenience of the whole microscope is the objective lens. The number of it will greatly affect the price of the microscope.
Question 2: Before purchasing, what kind of microscope is suitable for the sample you want to test?
Microscopes can be divided according to function according to different observation samples: generally there are metallographic microscopes, polarized microscopes, stereo microscopes, biological microscopes, fluorescence microscopes, etc. Different functional microscopes have different usages, such as polarized light microscopes, which are mainly used for the detection of anisotropic non-metallic materials such as geological ores. Metallographic microscopes are mainly used to observe and analyze various internal opaque materials such as metals. Applicable to factories and mines, universities and research departments. The instrument is equipped with an imaging device, which can take the metallographic map, measure and analyze the map, and edit, output, store and manage the image. Stereo microscopes are suitable for micron-scale analysis, fracture detection, inspection of electronic industrial production lines, verification of printed circuit boards, verification of soldering defects (printing misalignment, sag, etc.) in printed circuit components, verification of single board PCs, And in all areas where the surface of the sample is carefully observed, the measurement software can measure various data. The biological microscope is mainly used for medical diagnosis, laboratory testing, teaching and research in the medical and health fields and schools and research institutes. So, before purchasing, you should figure out what sample you want to observe, so that the merchant can recommend the microscope to you.
Question 3: Is buying an upright microscope or an inverted microscope?
Before answering this question, it should be clear what is the difference between an upright microscope and an inverted microscope:
Metallographic microscopes, also known as material microscopes, are mainly used to observe the structure of metal structures and can be divided into upright metallographic microscopes and inverted metallographic microscopes.
The upright metallographic microscope is imaged as a positive image during observation, which brings great convenience to the user's observation and discrimination. In addition to the analysis and identification of metal samples of 20-30mm height, it is in line with people's daily habits. Therefore, it is more widely used in transparent, translucent or opaque substances. Observation targets larger than 3 microns and smaller than 20 microns, such as cermets, electronic chips, printed circuits, LCD substrates, films, fibers, granular objects, coatings, etc., can have good imaging effects. In addition, the external camera system can easily connect the video screen and computer for real-time and static and dynamic image observation, saving and editing, and printing combined with various software to carry out more professional metallographic, measurement and interactive teaching fields. Inverted metallographic microscopes use optical planar imaging to identify and analyze the structure of various metals and alloys. It is an important tool for metallographic metallographic research. It can be widely used in factories or laboratories for casting quality and raw material inspection. Or the research and analysis of the metallographic structure of the material after the treatment, thus providing an intuitive analysis result, which is the key equipment for the quality identification and analysis of casting, smelting and heat treatment in the mining, metallurgy, manufacturing and mechanical processing industries. In recent years, the microelectronics industry has supported the production of chips due to the need for high-magnification planar microscopy. Therefore, metallographic microscopes have been introduced into the field and are being continuously improved to meet the special needs of the industry. Inverted metallographic microscope, because the specimen is facing down and coincides with the surface of the table, the objective lens is located under the table and viewed upwards. This form of observation is not limited by the height of the sample. It is easy to use and compact. Beautiful and elegant, the inverted metallographic microscope has a large supporting area, a low center of gravity, safe and stable, and the eyepiece and the supporting surface are inclined at 45 ° C for comfortable viewing.
Inverted metallographic microscope has a direct image output function through technology upgrade, which can be easily connected to the computer and intelligently processed according to the process requirements. Simply put: the upright sample is placed underneath and the inverted sample is placed on top. The upright objective is down and the inverted objective is up. That is to say: the inverted lens is placed under the stage, and the test piece is placed face down on the stage. At this time, the lens is down, the test piece is placed upside down, and the lens is observed from the bottom to the test surface.
The upright lens is placed on the stage, and the test piece is placed face up on the stage. At this time, the lens is on, the test block is placed on the top, and the lens is observed from the top to the bottom.
After selecting a certain kind of microscope according to the sample, consider whether you choose an upright microscope or an inverted microscope. You can basically refer to the above points, and you should also consider your existing sample preparation conditions, because the vertical microscope The sample preparation requirements are relatively high and the inverted microscope is relatively low.
Question 4: How much is your budget?
At present, the microscopes on the market mainly include domestic and imported products. Generally speaking, the price gap is several times to ten times. You can decide whether to buy domestic or imported products according to your current budget. However, if your budget is relatively adequate or there is no fixed budget, it is recommended that you purchase an imported microscope. Of course, Xiao Bian here does not deny that domestically produced microscopes have made great progress in recent years, but in terms of optical path design and mechanical stability, domestic microscopes are still far below the quality of imported microscopes, and from the perspective of long-term investment. Look, the imported microscope (small series refers to the microscope imported from abroad, except for the joint venture production). The general service life is about 60 years, and the domestic or some joint venture brands have the image quality within a few years after purchase. Clear, unstable and other problems, so it is not as cost-effective as a one-time permanent investment. If you choose a domestic microscope, we will consider the LW brand, low-end products: generally infinity, the objective lens is flat. High-end products: generally the objective lens is limited and achromatic.
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