Senin, 13 Desember 2010

Light Microscope


Light microscope or also known as "Compound light microscope" is a microscope that uses light instead of sunlight as in the conventional microscope. In a conventional microscope, light source still comes from sunlight reflected by a flat or a concave mirror located below the condenser. This mirror would direct light from outside into the condenser.
Light microscope using three types of lenses, the objective lens, ocular lens, and condenser.

Objective lens and eyepiece lens are located at both ends of the tube while the use of the microscope lies in the microscope eyepiece can be a single lens (monokuler) or double (binoculars). At the lower end there is a place holder microscope objective lens that can be fitted with three lenses or more. Under the microscope tube microscope there is a table which is where preparations.

The third system is a condenser lens. Condenser serve to illuminate the object and the lens of the microscope to another.
How it Works:
* The lens objective function to the formation of the first image and determine the microscopic structure and which will look at the shadow end and the ability to enlarge the image so that objects can have value "Apertura" which is a measure of the power split an objective lens that will determine the power split specimen, so as to shows the microscopic structure of adjacent as two separate objects.

* Ocular lenses, lens microscope is located at the tip of the tube adjacent to the eye of the observer, and serves to enlarge the image produced by objective lens ranges from 4 to 25 times.

* Condenser lens, is the lens that serves to promote the development of lighting on the object to be viewed so that with the right settings it will obtain the maximum separation power.

If the power is less than the maximum separation, the two objects will be seen to be one and pembesarannyapun be less than optimal.
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Digital Microscope


A digital microscope is a variation of a traditional optical microscope that uses optics and a charge-coupled device (CCD) camera to output a digital image to a monitor, sometimes by means of software running on a computer. A digital microscope differs from an optical microscope in that there is no provision to observe the sample directly through an eyepiece. Since the optical image is projected directly on the CCD camera, the entire system is designed for the monitor image. The optics for the human eye are omitted.

Digital microscope is the term commonly used for low price commercial microscopes designed for use with a computer. Although some systems do not require a separate computer and can cost tens of thousands. These normally omit the optics for illumination (for example Köhler illumination and phase contrast illumination) and are more akin to webcams with a macro lens. For information about optical microscopes with a digital camera in research and development see optical microscope.

Jumat, 10 Desember 2010

Microscope


Optical Microscope
Optical microscope is a type of microscope that uses visible light and lens system to enlarge images of small samples. Optical microscope is the oldest design of the microscope and is designed around 1600. Basic optical microscope can be very simple, although there are many intricate designs that aim to improve the resolution and contrast of the sample. History of optical microscope that is easy to develop and popular because of their use of visible light so that samples can be directly observed by the eye. Images from optical microscope can be captured by a camera that is sensitive to normal light to produce a micrograph. Initially the image was captured by photographic film, but modern developments in CMOS and then charge-coupled device (CCD) camera enables digital image capture. Pure Digital microscopes are now available that only use CCD camera to examine a sample, and images displayed directly on a computer screen without the need for eye-pieces. Alternatives to optical microscopy using a light that does not include scanning electron microscopy and transmission electron microscope.

Optical configuration
There are two basic configuration of a conventional optical microscope, a simple (one lens) and compound (many lenses). Most modern research microscope compound microscope microscope while some simple inexpensive commercial digital single-lens microscope. A magnifying glass is, in essence, the basic single-lens microscope. In the optical microscope is generally static; to focus on a different depth of focus lens to sample distance is adjusted and to get a wider field or a narrow view of lenses of different magnification objective should be used. Most modern research microscope also has a separate set of optics to illuminate the sample.
Single lens (simple) microscopes. A simple microscope is a microscope that uses only one lens for magnification, and is the original design of the light microscope. Van Leeuwenhoek Microscope consists of a lens, a small single convergent mounted on a brass plate, with a screw mechanism to hold the sample or specimen to be examined. Demonstrations by British microscopist has a picture of the basic instrument. Though now considered primitive, the use of lenses, convex sole to see still be found in simple magnification devices, such as a magnifying glass and loupe it.
The compound microscope A compound microscope is a microscope that uses multiple lenses to collect light from the sample and then a separate set of lenses to focus light into the eye or camera. Compound Microscope heavier, larger and more expensive than a simple microscope because of the increased number of lenses used in construction. The main advantage of several enhanced numerical aperture lens (see below the resolution limit), reduced chromatic aberration and the objective lens to adjust the rate of enlargement. A compound microscope also create more advanced lighting settings, such as phase contrast.

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