Microscope Optical System
1. eyepiece
It is a lens inserted on the top of the eyepiece tube, which is composed of a group of lenses, which can make the objective lens double resolution and magnify the object image, such as 10X, 15X, etc. According to the size of the field of view that can be seen, eyepieces can be divided into two types: ordinary eyepieces with a smaller field of view and large-field eyepieces (or wide-angle eyepieces) with a larger field of view. The eyepieces of relatively high-end microscopes are also equipped with a diopter adjustment mechanism, and the operator can easily and quickly adjust the diopter for the left and right eyes respectively; Focuses sharply on the focal plane of the specimen; and, to prevent eyepieces from being removed and to reduce the possibility of damage in transit, these eyepieces can be locked.
2. objective lens
It is installed on the hole of the converter and also consists of a set of lenses that can magnify objects clearly. The magnification is engraved on the objective lens, mainly including 10X, 40X, 60X, 100X and so on. Liquid immersion objectives are often used in high-magnification objectives, that is, liquids with a refractive index of about 1.5 (such as fir oil) are filled between the lower surface of the objective lens and the upper surface of the specimen, which can significantly improve the resolution of microscopic observation.
3. Light sources include halogen lamps, tungsten lamps, mercury lamps, fluorescent lamps, metal halide lamps, etc.
4. Concentrator
Including condenser, aperture diaphragm. The condenser is composed of lenses, which can concentrate the transmitted light, so that more light can be concentrated to the observed part. The aperture diaphragm can control the light transmission range of the condenser to adjust the light intensity.
