Bright Field Microscopes

If the sun is the center of the universe and our own primary source of light then what is an illuminator? Illuminator is the main source of light in a microscope, which illuminates the object to be observed. The illumination system or the light source is a vital part of microscopic equipment since all specimens rarely generate their own light. That’s why illumination is extremely necessary. Overhead lights can provide some illumination, table lamps or the most is sunlight.
Illumination just like light bulbs comes in different types such as fluorescent, halogen, tungsten and LED. Other illumination is achieved by the varying amount of light like diffuse illumination, this is where you place ground glass or other similar material in front of the condenser, and it will cause the light of a bright field source to be scattered. Other illumination technique is phase contrast, this is mainly used to view large spectrum of living biological specimens because they are virtually transparent. Dark field is another form of illumination that examine transparent and semi transparent specimens, while Koehler illumination is another form of technique that utilizes to optimize light quality and sharpness. Bright field illumination is the most basic and common form of lighting for microscopes with a highly directional and intense light source. It has been widely used for observation modes in optical microscopy since its invention for the past 300 years ago.
Basically, when we talk about bright field microscopy we are talking about the technique in using the bright field microscopes. This type of equipment relies entirely upon the light from the lamp source gathered by the substage condenser and shaped into a cone whose apex is focused at the plane of the specimen. These specimens can be viewed because this device is capable of changing the speed and the path of the light passing through the them. By rapidly changing the light passing through the path it will able to interfere with each other which produce contrast, and therefore you are able to view a specimen. So in other words, brightfield microscopy can only be achieved when illumination like sunlight or halogen light is altered both before and hitting the sample.
Brightfield microscopes are now widely used by experts as they are relatively straight forward to use and very versatile at imaging a wide range of specimens. So surf up and be informed about the amazing things you can learn about brightfield microscopes and other related topics.