The role of each part of the microscope structure
1. Eyepiece
Magnification is engraved above the eyepieces, such as 10×, 20×, etc. According to the size of the field of view, eyepieces can be divided into ordinary eyepieces and wide-angle eyepieces. Some microscope eyepieces are also attached to the visual adjustment mechanism, the operator can be adjusted to the left and right eyes, respectively, visual adjustment. Another photographic eyepiece (NFK) can be used for filming.
2,Objective lens
Composed of several groups of lenses, mounted on the converter, also known as the objective lens. Observation process objective lens selection generally follow the order from low to high, because the low magnification of the field of view is large, easy to find the specific parts to be examined. The magnification of the microscope can be roughly regarded as the product of the magnification of the eyepiece and the magnification of the objective lens.
3,Concentrator
The function of the condenser lens is to focus the light within the field of view; the iridescent aperture below the lens group can be opened up and down to control the range of light through the condenser, adjusting the intensity of light, affecting the resolution and contrast of the imaging. Use should be based on the purpose of observation, with the intensity of the light source to be adjusted to get the best imaging effect.
4,Light source
Earlier ordinary optical microscope with the help of the mirror on the base of the reflector, the natural light or light reflected to the centre of the condenser lens as a mirror light source. Reflector is composed of a plane and another concave mirror.
Do not use the concentrator or when the light is strong with concave mirrors, concave mirrors can play the role of convergence of light; with the concentrator or when the light is weak, generally use a flat mirror. Recently produced microscopes are generally installed directly on the mirror base light source, and current adjustment screw, used to adjust the intensity of light.
5,Mirror base
The base part, used to support the whole microscope smoothly.
6,Mirror column
The short upright column between the mirror base and the mirror arm, plays the role of connection and support.
7,Mirror arm
The bow-shaped part at the back of the microscope, is the part to hold when moving the microscope. Some microscopes have a movable tilting joint between the mirror arm and the mirror column, which can adjust the angle of the mirror tube tilted backward for easy observation.
8,Mirror tube
Installed at the apex of the mirror arm of the cylindrical structure, connected to the upper eyepiece, the lower connected to the objective lens converter. The international standard barrel length of the microscope is 160 mm, and this number is marked on the housing of the objective lens.
9,Objective converter
The freely rotatable disc at the lower end of the barrel is used to mount the objective lens. The objective lenses can be changed to different magnification by turning the converter during observation.
10,Loader platform
The platform under the barrel of the mirror, with a round light-through hole in the centre. It is used to place slides. Carrier stage is equipped with a fixed specimen spring clip, one side of the propeller, you can move the position of the specimen. Some propellers are also attached to the scale, you can directly calculate the distance moved by the specimen as well as determine the position of the specimen.
11,Collimation screw
Installed in the mirror arm or mirror column on the size of two kinds of spiral, rotation can make the lens barrel or carrier table up and down, so as to adjust the focal length of the imaging system. The big one is called coarse collimation spiral, every turn, the barrel of the mirror lift 10mm; small for fine collimation spiral, turn a circle can make the barrel of the mirror only lift 0.1mm. generally in the low-magnification observation of the object under the mirror, the coarse collimation spiral quickly adjust the object image, so that it is located in the field of view.
On this basis, or when using high magnification, fine focusing spiral fine adjustment. It must be noted that the general microscope is equipped with two sets of left and right focusing spirals, which serve the same purpose, but do not rotate the spirals on both sides at the same time with both hands, in order to prevent torsion due to the unequal strength of both hands, which may lead to spiral slippage.
