How to clean the microscope eyepiece?
1. Use an ear wash ball to blow away dust
2. Dip a long fiber cotton swab in pure alcohol (100%). Long fibers are used to prevent short cotton fibers from remaining on the protective filter of microscope lenses or digital cameras. The purpose of 100% pure alcohol is to avoid leaving water marks after wiping.
3. Discard excess liquid (to prevent too much liquid from remaining on the surface of the lens).
4. Use the center of the lens as the center and push the dirt towards the edge of the lens in the same direction as the circle.
5. If there are dirt spots that cannot be removed, please contact the engineer. The engineer will take measures according to the situation to avoid loss of coating.
Many customers have reported that when using a microscope, they use a mixture of cleaning paper, alcohol, and ether to wipe the eyepiece and objective lens, but the effect is not ideal, and there is always dust on it that cannot be wiped off. The correct method should actually be to wrap the wooden strip with lens paper, dip it in a mixed solution (a mixture of alcohol and ether), start from the middle of the lens, and spiral outwards. The paper can only be used once per use and cannot be reused repeatedly,
The function and composition of microscope eyepiece
The eyepiece is also a major component of a microscope, and its main function is to enlarge the real image obtained by enlarging the objective lens again, thereby forming a clear virtual image at a visible distance; Therefore, its quality will ultimately affect the quality of the object. In microscopic photography, a real image is formed at the ground glass.
Some eyepieces (such as compensating eyepieces) not only have a magnifying effect, but also can correct residual aberrations generated during the imaging process of the objective lens. The construction of an eyepiece is much simpler than that of an objective lens. Because the beam passing through the eyepiece is close to parallel, spherical aberration and longitudinal (axial) chromatic aberration are not severe.
When designing, only consider horizontal color difference (magnified color difference). The eyepiece consists of two parts, with the lens located at the upper end called the eyepiece lens, which plays a magnifying role; The lower lens is called a converging lens or field lens, which makes the image brightness uniform. In the middle of the upper and lower lenses or at the lower end of the lower lens, there is a light barrier where accessories such as a micrometer, cross glass, pointer, etc. are installed.
The aperture angle of the eyepiece is very small, so its resolution is very low, but enlarging the initial image of the objective lens is sufficient. The commonly used eyepiece magnifications include: 8 ×, 10 ×, 12.5 ×, 16 ×, and so on. Installed at the upper end of the lens barrel, usually 2-3 are available, with 5 ×, 10 ×, or 15 × symbols engraved on them to indicate their magnification. Generally, a 10 × eyepiece is installed.
