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Coordination between condenser and objective lens
This article is organized and provided by an inverted microscope. The so-called coordination between the condenser and the objective lens is to make t
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This article is organized and provided by an inverted microscope
③ Coordination between condenser and objective lens
The so-called coordination here refers to aligning the numerical apertures of the condenser and the objective lens to achieve better and more precise observation. If the numerical aperture of the condenser is lower than that of the objective lens, some of the numerical aperture of the objective lens will be wasted, thus failing to achieve its effective resolution.
If the numerical aperture of the condenser is larger than that of the objective lens, on the one hand, it cannot improve the prescribed resolution of the objective lens, and on the other hand, the clarity of the object image will decrease due to the illumination beam being too wide. The operation method of combining the condenser and objective lens is: after completing the illumination and focusing operations, remove the eyepiece and look directly into the lens barrel, close the variable aperture under the condenser to the minimum, and then slowly open it up. Open it to a diameter exactly the same as the field of view, then press the eyepiece to observe. Every time the objective lens is converted, the following coordination operations must be carried out sequentially. Some condenser variable aperture frames are engraved with a scale indicating the opening aperture, which can be matched according to the scale.
If the numerical aperture of the condenser is larger than that of the objective lens, on the one hand, it cannot improve the prescribed resolution of the objective lens, and on the other hand, the clarity of the object image will decrease due to the illumination beam being too wide. The operation method of combining the condenser and objective lens is: after completing the illumination and focusing operations, remove the eyepiece and look directly into the lens barrel, close the variable aperture under the condenser to the minimum, and then slowly open it up. Open it to a diameter exactly the same as the field of view, then press the eyepiece to observe. Every time the objective lens is converted, the following coordination operations must be carried out sequentially. Some condenser variable aperture frames are engraved with a scale indicating the opening aperture, which can be matched according to the scale.
The invention and innovation of microscopes in history have brought about a leap forward in human cognition; It has brought unprecedented expansion to human life. In today's era of promoting technological innovation, the use of microscopes has become a basic skill for middle school students, mastering structure, scientific use, and good maintenance, making it a window for young people to explore the future world.【11-25】
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