A laboratory instrument used to magnify objects. Many disease-producing organisms are so small that they can be observed only through the use of a These organisms are said to be microscopic.
A scientific instrument with lenses, which makes very small objects appear larger.
Instrument for producing a magnified image of an object that may be so small as to be invisible to the naked eye. There are several types of microscopes, including the light microscope, which uses light as the source of radiation and a combination of lenses to magnify and focus the object; and the electron microscope, in which a beam of electrons is used to scan and produce an image of the object.
An instrument for producing a greatly magnified image of an object, which may be so small as to be invisible to the naked eye. Light or optical microscopes use light as a radiation source for viewing the specimen and combinations of lenses to magnify the image, usually an objective and an eyepiece.
An optical instrument comprising adjustable magnifying lenses that greatly enlarge a small object under study for example, an insect, blood cells, or bacteria. Some microscopes use electron beams to magnify minute objects such as chromosomes, crystals, or even large molecules. Optical microscopes are also used for microsurgery when the area being operated on is otherwise inaccessible: for example, in eye and inner ear surgery; for the removal of tumours from the brain or spinal cord; and for resuturing damaged blood vessels and nerves.
A device designed to create an enlarged depiction of exceedingly small objects. Microscopes are employed to scrutinize the arrangement and chemical makeup of cells and tissues, as well as to explore microorganisms and pathological tissues. Within the surgical environment, microscopes are utilized for microsurgery procedures.
Compound microscopes represent the most commonly employed variety. They consist of two lens systems, the objective and the eyepiece, positioned at opposing ends of a tube known as the body tube. These microscopes are equipped with a stage for specimen placement, a light source, and an optical condenser responsible for light concentration. The upper limit of magnification achievable is approximately 1,500 times.
Phase-contrast and interference microscopes are adaptations of conventional light microscopes that facilitate the observation of unstained, transparent samples. These microscopes are utilized for the investigation of living cells and tissues.
Fluorescence microscopes employ ultraviolet light to examine specimens that have been treated with fluorescent dyes.
Electron microscopes achieve significantly greater magnifications compared to light microscopes, utilizing an electron beam instead of light. There exist two main types: transmission electron microscopes (TEMs) and scanning electron microscopes (SEMs). TEMs are capable of magnifying objects up to approximately 5,000,000 times, enabling the visualization of minuscule viruses and molecules. On the other hand, SEMs offer a lower maximum magnification (100,000 times), yet they generate three-dimensional images, making them valuable for the examination of surface characteristics of cells and tissues.
A tool utilized to magnify small objects, unveiling intricate details that are imperceptible to the naked eye.