Microscope Concentrator Action
Instrument structure
Mechanical part
① Mirror base: It is the base of the microscope to support the entire mirror body.
② Mirror column: It is the upright part of the mirror base, which is used to connect the mirror base and the mirror arm.
③ Mirror arm: One end is connected to the mirror column, and the other end is connected to the lens barrel, which is the part that is held by the hand when taking and placing the microscope.
④ Lens barrel: connected to the front and top of the mirror arm, the upper end of the lens barrel is equipped with an eyepiece, and the lower end is equipped with an objective lens converter.
⑤ Objective lens changer: It is connected to the bottom of the prism shell and can be rotated freely. There are 3-4 round holes on the disk, which are the parts for installing the objective lens. Rotating the changer can exchange the objective lens of different magnifications. Observation can be carried out. At this time, the optical axis of the objective lens is just aligned with the center of the light hole, and the optical path is connected.
⑥ Stage: Below the lens barrel, there are two shapes, square and round, for placing glass specimens.
⑦ Adjuster: It is two kinds of spirals installed on the mirror column, which make the mirror stage move up and down when adjusting.
①Coarse adjuster (coarse screw): The large screw is called the coarse adjuster, which can quickly adjust the distance between the objective lens and the specimen to make the object image appear in the field of view. Usually, when using a low magnification lens, the coarse adjuster is used to quickly find the object image.
②Fine adjuster (thin screw): The small screw is called the fine adjuster. When moving, the stage can be slowly raised and lowered. It is mostly used when using a high-power mirror, so as to obtain a clearer image and observe the different levels and depths of the specimen. Structure
lighting part
Installed under the mirror stage, including reflector and light collector.
① Reflector: It is installed on the mirror base and can be rotated in any direction. It has flat and concave sides. Its function is to reflect the light of the light source to the condenser, and then illuminate the specimen through the light hole. The concave mirror has a strong condensing effect. , suitable for use when the light is weak.
② Light collector (condenser): It is located on the light collector frame below the stage and consists of a condenser lens and an aperture, and its function is to concentrate the light on the specimen to be observed.
Optical part
① Eyepiece: It is installed on the upper end of the lens barrel, usually there are 2-3 pieces, with 5×, 10× or 15× symbols engraved on it to indicate its magnification, usually 10× eyepieces are installed.
② Objective lens: installed on the rotator at the lower end of the lens barrel, generally there are 3-4 objective lenses.
working principle
Both the eyepiece and objective lens of an optical microscope are convex lenses with different focal lengths. The focal length of the convex lens of the objective lens is smaller than the focal length of the convex lens of the eyepiece. The objective lens is equivalent to the lens of the projector, and the object becomes an inverted and enlarged real image through the objective lens. The eyepiece is equivalent to an ordinary magnifying glass, and the real image is turned into an upright, magnified virtual image through the eyepiece. Objects that pass through the microscope to the human eye are inverted and magnified virtual images. Mirrors are used to reflect and illuminate the object being observed. The reflector generally has two reflective surfaces: one is a flat mirror, which is used when the light is strong; the other is a concave mirror, which is used when the light is weak and can focus the light.
