Installed under the stage, including reflector and light collector.

(1) reflector: installed on the mirror base and can rotate in any direction. It has flat and concave sides, and its function is to reflect the light emitted by the light source to the condenser, and then illuminate the specimen through the light hole. Concave mirror has a strong condensing effect, which is suitable for use in weak light, while flat mirror has a weak condensing effect, which is suitable for use in strong light.

(2) The light collector (condenser) is located on the light collector frame below the stage and consists of a condenser and an aperture. Its function is to focus light on the sample to be observed.

(1) condenser: It consists of one or several lenses, which can collect light, enhance the illumination of the specimen, and make the light enter the objective lens. There is an adjusting screw next to the lens column, which can rotate to lift the condenser and adjust the brightness of light in the field of view.

(2) Aperture (iridescent aperture): Below the condenser, it consists of more than a dozen pieces of metal, and a handle extends out. Press it to adjust the size of the opening, thus adjusting the amount of light.

Optical part

(1) eyepiece: it is installed at the upper end of the lens barrel, and generally has 2-3 eyepieces, with symbols of 5×, 10× or 15× engraved to indicate its magnification. General installation 10× eyepiece.

(2) Objective lens: installed on the rotating body at the lower end of the lens barrel, there are generally 3-4 objective lenses, of which the shortest one engraved with the symbol "10X" is a low-power mirror, the longer one engraved with the symbol "40X" is a high-power mirror, and the longest one engraved with the symbol "10x" is an oil mirror. Besides,