How to choose a high-precision microscope
Microscope is a precision optical instrument, its core technology is optical technology, product quality is high or low, the key to look at the optical system (including illumination system, objective lens, etc.), which is also the basic principle of the purchase of microscopes. In the imported microscope manufacturers (vision, Germany, Germany, Zeiss, Germany, Leica, Japan, Nikon, Japan, Olympus) in the quality of good and bad, the user in the selection process Ying rational analysis, do not go astray, and ultimately lead to unavoidable economic losses.
The following selection process should focus on the assessment of the technical indicators are described below:
First, the imaging quality
We use the microscope is mainly the use of optical imaging principles to obtain microstructure images, and then qualitative and quantitative analysis of the image, so the quality of imaging is * key indicators. A clear image in the field of metallography we call a sharp image. And to obtain a sharp image must meet the four basic conditions of high contrast, high brightness, good colour reproduction and high resolution. Contrast, brightness, colour reproduction is precisely the user selection is easy to ignore the place, only the blind pursuit of resolution and lead to selection failure. For example, a large domestic steel mill purchased in 2000, a Japanese brand imaging quality is far worse than the 1985 purchase of the German Zeiss microscope, but the objective lens of the numerical aperture is higher than the Zeiss. In fact, the reason is very simple, is that these manufacturers in the manufacture of microscopes only take into account the image imaging quality of a factor - resolution, while ignoring other important factors such as contrast, brightness, colour reproduction. At this point the German Zeiss company did better. They use the ICCS optical system and the unique anti-glare technology to make the image liner, brightness, colour reproduction has been significantly improved, so as to obtain the most subtle tissue and delicate colour. Only in this way can accurate image analysis.
Second, mechanical stability
With good imaging quality is not enough, but also with the passage of time should continue to maintain high quality, which we call 'mechanical stability'. Because the microscope is not a low-value consumables, its normal service life should be more than 30 years, in this regard, we recommend that users focus on the following points:
1. raw materials, 2. manufacturing precision, 3. mechanical design, 4. place of origin (currently many imported microscope manufacturers have joint ventures in China).
Comparison of the above indicators at the same time the conditions of the user's best to bring their own samples for 'field visits', there are comparisons to identify. In short, choose a good microscope is not only to buy a high-quality products, but also a kind of investment in a high level of vision.
