The link between the objective lens's length and the microscope's eyepiece's magnification
(1) The longer the eyepiece, the smaller the magnification, otherwise the greater the magnification.
(2) The longer the objective lens, the greater the magnification, and the closer the distance to the film loading; otherwise, the smaller the magnification, the farther the distance from the film loading.
(3) The upper end of the objective lens is threaded, but the eyepiece is not.
The eyepiece is a visual optical device used to observe the image formed by the front optical system. It is a component of visual optical instruments such as telescopes and microscopes. Its main function is to re-magnify the real image magnified by the objective lens. In order to eliminate aberration, the eyepiece is usually composed of several lenses, which have a large field of view and viewing angle magnification.
The objective lens is a lens group composed of several lenses. The purpose of combined use is to overcome the imaging defects of a single lens and improve the optical quality of the objective lens.
(1) Essence of magnification: magnification refers to the enlarged length or width, not the area or volume.
(2) Calculation of magnification: The magnification of the microscope is equal to the product of the magnification of the eyepiece and the magnification of the objective lens.
(3) After switching to a high-magnification objective lens, the coarse quasi-focus screw can no longer be turned, and can only be adjusted with the fine quasi-focus screw.
(4) After changing to a high-magnification objective lens, if the field of view is too dark, first adjust the shutter (change to a larger aperture) or mirror (use a concave mirror) to make the field of view brighter, and then adjust the fine focus screw.
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(5) When observing materials with dark colors, the field of vision should be properly adjusted, otherwise, it should be properly adjusted.
