Microscope Parts and their Functions. Skills and Strategies Applied: Following directions Cueing Techniques (word bank) Graphic Organizers to formulate.

MICROSCOPE PARTS AND FUNCTIONS. Microscope Invented by a Dutch spectacle maker in the late 16th century, light microscopes use lenses and light to magnify images. Although a magnifying glass technically qualifies as a simple light microscope, today's high-power—or compound— microscopes use two sets of. Nosepiece: A rotating turret that houses the objective lenses. The viewer spins the nosepiece to select different objective lenses. Objective lenses: One of the most important parts of a compound microscope, as they are the lenses closest to the specimen. KBears: The Parts of a Microscope; Waukesha South High School: Parts of the Microscope and their Functions; College of Arts and Science at Miami.

Further information: and Although objects resembling lenses date back 4000 years and there are accounts of the optical properties of water-filled spheres (5th century BC) followed by many centuries of writings on optics, the earliest known use of simple microscopes () dates back to the widespread use of lenses in in the 13th century. The earliest known examples of compound microscopes, which combine an near the specimen with an to view a, appeared in Europe around 1620. The inventor is unknown although many claims have been made over the years. Several revolve around the spectacle-making centers in the including claims it was invented in 1590 by (claim made by his son) and/or Zacharias' father, Hans Martens, claims it was invented by their neighbor and rival spectacle maker, (who applied for the first patent in 1608), and claims it was invented by who was noted to have a version in London in 1619. The Complete Turtle Trader Rapidshare Movies there.

(also sometimes cited as compound microscope inventor) seems to have found after 1610 that he could close focus his telescope to view small objects and, after seeing a compound microscope built by Drebbel exhibited in Rome in 1624, built his own improved version. Coined the name microscope for the compound microscope Galileo submitted to the in 1625 (Galileo had called it the ' occhiolino' or ' little eye').

Rise of modern light microscopes The first detailed account of the of organic tissue based on the use of a microscope did not appear until 1644, in Giambattista Odierna's L'occhio della mosca, or The Fly's Eye. The microscope was still largely a novelty until the 1660s and 1670s when naturalists in Italy, the Netherlands and England began using them to study biology, both organisms and their. Italian scientist, called the father of by some historians of biology, began his analysis of biological structures with the lungs. 's had a huge impact, largely because of its impressive illustrations. A significant contribution came from who achieved up to 300 times magnification using a simple single lens microscope. He sandwiched a very small glass ball lens between the holes in two metal plates riveted together, and with an adjustable-by-screws needle attached to mount the specimen.

Then, Van Leeuwenhoek re-discovered (after ) and, and helped popularise the use of microscopes to view biological ultrastructure. On 9 October 1676, van Leeuwenhoek reported the discovery of micro-organisms. The performance of a light microscope depends on the quality and correct use of the lens system to focus light on the specimen and the objective lens to capture the light from the specimen and form an image. Early instruments were limited until this principle was fully appreciated and developed from the late 19th to very early 20th century, and until electric lamps were available as light sources.

In 1893 developed a key principle of sample illumination,, which is central to achieving the theoretical limits of resolution for the light microscope. This method of sample illumination produces even lighting and overcomes the limited contrast and resolution imposed by early techniques of sample illumination. Further developments in sample illumination came from the discovery of by in 1953, and illumination by in 1955; both of which allow imaging of unstained, transparent samples. Electron microscopes. Electron microscope constructed by in 1933 In the early 20th century a significant alternative to the light microscope was developed, an instrument that uses a beam of rather than to generate an image.

The German physicist,, working with electrical engineer, developed the first prototype electron microscope in 1931, a (TEM). The transmission electron microscope works on similar principles to an optical microscope but uses electrons in the place of light and electromagnets in the place of glass lenses. Use of electrons, instead of light, allows for much higher resolution. Development of the transmission electron microscope was quickly followed in 1935 by the development of the.