The Composition Of An Optic Microscope
If you desire to observe an object at a more intimate level, what equipment will you resort to? That's right! A microscope. And the most conventional type of microscope is the optical microscope. An optical microscope is also called as a compound microscope. Its distinctive feature is the presence of a single eyepiece, as opposed to a stereoscopic microscope, or a stereo microscope as it is fondly called, which possesses two eyepieces, one for each eye. Will a compound microscope be able to present a clearer magnification of the object compared to the results that can be produced by a stereoscopic microscope? Studies show that the latter is more efficient in this category. But for common needs, a compound microscope will more than suffice.
Once you're using an optic microscope, you might notice two dials on its side, which should be on your left. These dials are for course focus and fine focus respectively. Course focus is the dial located at the top, and it is used to adjust the texture of the view of the specimen's surface. Fine focus, on the other hand, is used to refine the image you will be seeing.
At the other end of the ocular tube which serves as the main body of the microscope, the side directly opposite the optic lens, is the objective lens. This is the lens that is closest to the specimen. The space in between the optic lens and the objective lens, which is confined in the tube, is where light is condensed. The process is essential o achieve the desired magnification.
Right below the objective lens is the stage. This is where the specimen is placed. If the specimen is in liquid form, it will be supported by a transparent slide. If the specimen is solid, you'd need a special stage to hold the same, one which usually has a depression to make the object fit. But solid specimens are best observed via stereoscopic microscopes, because this type provides the best three dimensional view of the object.
Since our perception of an object is just the assimilation of our eyes of refracted light, an optic microscope should have its own light source. This light source can be found beneath the stage, right under the diaphragm that regulates the same. Such a light source can either be powered by halogen or fluorescent. Like any other light source, it is by no means perennial. You'd have to change the bulb once it consumes its life.
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