Stage: this is the flat horizontal platform positioned at about halfway through the length of the microscope with a hole at the centre that allows the passage of light for illumination of the sample.įocus knobs: Two pairs of knobs are attached to the arm that help in up and down movement of the stage and in adjustment and focusing of specimens of different thickness. The metallic arm is connected to a U shaped strong and heavy base that provides stability to the instrument. The major components of a compound microscope are :įramework: The basic frame structure is made up of metal, which includes the arm and base to which whole of the magnification and optical components are attached. Labeled Diagram of a Compound Microscope Components of a Compound Microscope The light then enters the objective lenses, which further magnifies the image. In a compound light microscope, light originates from an illuminator and passes through condenser lenses, which direct light onto the specimen. Various small specimens can be studied to find details with a compound light microscope. It consists of a series of lenses that utilizes visible light as its source of illumination. These are the most basic type of microscopes used in microbiology. Leeuwenhoeck’s simple microscopes allowed him to magnify images from 100 to 300 X. When an object is kept near the lens, its principal focus with an image is produced, which is erect and bigger than the original object. The examples of this kind of instrument include the hand lens and reading lens. It has a double convex lens with a short focal length. Simple microscopes have only one lens like a magnifying glass. Modern microscopes produce images with great clarity, magnifications that range from ten to thousands of times. The size of the specimen determines which microscopes can be used to view the specimen effectively. The unit of measurement used to measure microorganisms is the Metric System. Microorganisms are observed and studied with the help of microscopes. Considering the nature of the objects to be studied, the microscope becomes an instrument of paramount importance. Observation of microorganisms is an integral part of Microbiology. Microbiology deals with the study of microorganisms that cannot be seen distinctly with the unaided eye.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |