Cum până la cumpărare o biologic microscop
(1) Microscoape poate fi divizat în monocular, binocular, și tricular microscoape bazat pe număr de oculare folosit. În general, dacă utilizatori necesită a relativ simplu microscop și numai dor a ieftin unu, ei alege monocular microscoape. În general, monocular microscoape sunt mai multe potrivite pentru primar și gimnazial elevi, și unele mici clinici folosiți-le. Părinți și cumpărați-le pentru lor lor copii, care sunt în mod obișnuit utilizat și au au a relativ accesibil preț. Modelul general tranzacție preț este în jur 500 până la 800 yuan. Prețul al unui binoclu microscop este cu siguranță mai mare decât că din o o singură lentilă% 2c care poate fi vizualizat cu doi ochi. Prin urmare% 2c media tranzacție preț este în jur % 7b {3}% 7d. Tranzacția generală prețul a a trei scop microscop este în jur 3000 yuan
(2) Optical part: The core of the quality of a microscope is its optical part, which is the eyepiece and objective lens. For objective lenses, they can generally be divided into several levels. Firstly, there is an achromatic objective lens. When using this objective lens, not all areas of the image are clear, only about 60 percent of the central field of view is clear, and there will be certain defects in the 40 percent of the peripheral area. Usually, we place the observation part in the center of the field of view, so it does not affect the observation. But if you want a 100 percent field of view without defects, you need to use a flat field achromatic objective. Relatively speaking, this type of lens is much more expensive and is generally used in medical and scientific research. There is also a semi flat field achromatic objective that lies between the two. Students can choose the first two levels of microscopes to use. The generally cheaper lenses are ordinary achromatic lenses, with a transaction price of around 2000 yuan. The better ones are either achromatic lenses or infinite achromatic lenses, with a transaction price of around 3000 yuan. If it is for three purposes, the price will be more than a thousand yuan. So it is relatively simple for users to choose eyepieces, which are based on the size of their field of view. It is recommended to use a large field of view eyepiece because it has a larger opening and better visual effect compared to regular eyepieces. As for whether to choose a single tube or a double tube, it depends on your purpose and funding situation. In middle school, a single tube microscope can generally meet the requirements. In universities, it is best to choose a dual tube microscope.
(3) Structural materiale: Serviciul viața de microscoape este foarte long, unele poate ajunge mai mult decât 10 ani, so de înaltă calitate componente și strâns asamblare deveni garanția lor serviciul viața. Prin urmare, a microscop cu a stabil și robust cadru trebui fi ales, preferably made of alloy to reduce deformare. In addition, the lens should be made of optical glass, and the exterior paint layer should be be neted și uniform. De asemenea, make sure that the microscop you purchased is production according to relevant general standards, so that you can easy purchase relevant accessories in the future.
(4) Light source: There are generally three types of light sources for microscopes: tungsten filament lamps, fluorescent lamps, halogen lamps, and tungsten filament lamps, also known as incandescent lamps. The advantage of this type of lamp is that it is cheap and can provide a stable light source. The disadvantage is that the light emitted has a clear yellow color, which can affect observation. In addition, it generates too much heat, which can affect some materials after long-term observation. So if the microscope is a tungsten filament lamp, the price is relatively cheaper. Fluorescent lamps can provide a light source similar to sunlight, generating very little heat, and fluorescent lamps of the same power are much brighter than incandescent lamps. Therefore, fluorescent lamps will be more energy-efficient and more expensive in terms of price. Generally, the price is more than 10000 yuan for a whole family, some of which are 20000 yuan, while imported ones are even more expensive. Halogen lamps can provide a very bright and white light source, which is usually more expensive when paired with microscopes. Therefore, for universities, it is not necessary to choose them.
