![]() ![]() ![]() In a nutshell, both lens systems are connected to each other via a tube. In addition to the eyepiece, the objective lens is the second most important optical component on a microscope. For very high magnifications on special microscopes for metallurgy or material testing, the light is shined onto the specimen through the objectives. In addition, some models feature both illumination methods. This type of microscope is typically used for opaque objects such as coins, circuit boards and rock samples. On a reflected light microscope, the light source is located next to the specimen stage and shines onto the specimen from above. This enables the microscope to deliver a consistently optical resolution, contrast and depth of field. ![]() High-end models use so-called Köhler illumination, which reduces scattered light and illuminates the specimen uniformly by optimising the optical train. However, most microscopes now come with their own light source, which can often be adjusted to meet different needs. Traditionally, natural daylight or artificial light is directed through the specimen from below via a mirror. Transmitted light microscopes are used for examining transparent specimens. There are two types of light source used in microscopy – reflected light and transmitted light. ![]()
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