The condenser of a video microscope, also called a condenser, consists of a condenser and a variable aperturb. A condenser lens consists of one or more lenses, functioning like a convex lens, focusing light to enhance the light entering the objective. The variable aperture is also called the aperture, located below the condenser and consists of a dozen or so metal sheets, with a circular hole at the center. The handle that pushes the variable aperture can be freely adjusted to adjust the aperture size. Its function is to adjust the light intensity so that the numerical aperture of the condenser mirror matches that of the objective lens. The larger the variable light shutter opens, the larger the numerical aperture; Conversely, the numerical aperture becomes smaller.
The mirror of a video microscope is generally mounted on a base below the condenser and can rotate freely in both horizontal and vertical directions. One side is a flat mirror, and the other side is a concave mirror. Its function is to direct the light emitted from the source or natural light toward the condenser glass. Use a flat mirror when the light is strong, and a concave mirror when the light is weak. Some microscopes have artificial light sources installed inside the mount, and their mirrors are also fixed inside the frame.
A magnifying glass made of a single lens and a solid microscope composed of lenses (anatomical mirror) are called single-type microscopes. The optical microscopes used in biology teaching and research are generally compound microscopes.
Light incident from the outside is reflected upward by the mirror, or light emitted from the internal light source is viewed upward through the condenser mirror, then converged on the specimen under inspection by the condenser glass, providing sufficient illumination. Light reflected or refracted from the specimen enters through the objective lens, tilting the optical axis 45 degrees relative to the horizontal plane
A prism with a degree angle is magnified in the side light image at the focal plane of the eyepiece, that is, at the eyepiece's field of view light segment. This real image is then magnified into a virtual image through the eyepiece's eyepiece lens, so what people see is a virtual image.
The total magnification of the object under inspection after being magnified by the microscope's objective and eyepiece is the product of the objective lens and eyepiece. For example, the total magnification of a 40x magnified objective lens and a 10x magnified eyepiece is 400x.
