Use of sun visor: Adjust the aperture size by rotating the sun visor. Adjust the brightness of the field of view by changing the size of the aperture.
Usage rules: adjust the aperture, use a large aperture when the outside light is dark and a small aperture when the outside light is bright.
Microscope: an optical instrument composed of one lens or several lenses, which marks the entry of mankind into the atomic age. It is mainly used to enlarge tiny objects to human eyes. Microscope can be divided into optical microscope and electron microscope: optical microscope was first created by Zhan Sen and his son in Holland in 1590. At present, the optical microscope can magnify the object by 1600 times, and the minimum resolution reaches 0. 1 1 micron. The length of mechanical cylinder of microscope in China is generally 160 mm, among which, in order to develop microscope, there is a giant optical microscope in microbiology, which consists of eyepiece, objective lens, coarse focusing screw, fine focusing screw and wafer holder. The biggest contributors are Levin Hook and Dutch.
Maintenance: (1) Moisture-proof If the room is humid, the optical lens is prone to mildew and fog. Once the lens is moldy, it is difficult to take it out. Because the lens inside the microscope is not easy to wipe, humidity does more harm to it. Mechanical parts are easy to rust when they are wet. In order to prevent moisture, when storing the microscope, in addition to choosing a dry room, the storage place should also be far away from walls, floors and moisture sources. 1 ~ 2 bags of silica gel should be put in the microscope box as a desiccant. And silica gel is often baked. When it turns pink, it should be baked in time and then used again.
(2) Dust falls on the surface of dustproof optical elements, which not only affects the passage of light, but also produces large color spots after being amplified by the optical system, which affects observation. Dust and sand fall into mechanical parts, which will increase wear and tear, cause movement obstruction and do great harm. Therefore, the microscope must always be kept clean.
(3) The anti-corrosion microscope cannot be put together with corrosive chemical reagents. Such as sulfuric acid, hydrochloric acid, strong alkali, etc.
(4) The main purpose of heat protection is to prevent the lens from opening and falling off due to thermal expansion and contraction.
(5) Don't touch sharp objects such as nails and needles.
(6) Non-related personnel are not allowed to use it at will.