Fiber optic inspection microscopes are used to inspect the end face of a optical connector or cleaved fiber.
Two types of fiber optic microscopes are popular on the market: fiber optic connector termination inspection and fiber patch panel ferrule inspection.
Magnification levels of fiber scope are available at 200X or 400X for single mode fiber applications, 100X low cost type for multimode applications. The latter is often included in many fiber optic termination tool kits.
What types of flaws or contamination can the microscope see?
With at least 200X magnification you can clearly see scratches, dig, dirt deposit, debris and other contamination on a fiber optic connector.
Desktop video fiber microscope
The typical desktop fiber optic video inspection microscope has a 9" black and white monitor attached to the scope with a 4 feet video cable. So you can place the monitor where it is convenient. Because of its bulk volume, this type of fiber microscope is typically used in production environments and labs. Both 200X and 400X versions are available.
Portable optical fiber scope
This type of microscope with universal adapter is a versatile instrument to inspect fiber optic connectors. They can be used for both multimode and single mode applications. Connectors slide into scope adapter, providing ease of use with or without tripod. 8 degree angle adapter can be used for inspecting angled connectors such as FC/APC, SC/APC, etc. Both 200X and 400X versions are available.
These low cost microscopes are available in 200x or 400x magnification, and utilize white LED light to provide coaxial illumination to connector end-faces. This method of illumination produces high resolution detail of end face scratches, defects and contamination. It is provided with a universal 2.5mm adapter, with other common connector styles available. These are the natural choice for fiber installation contractors.
Ferrule inspection microscopes
All aforementioned four types of microscopes are for standalone fiber connector inspection. But what about the connectors already installed on patch panels and hardware devices? The ferrule inspection microscopes are the solution.
These video fiber optic microscopes include a handheld LCD display unit and a small, lightweight probe that contains a long-life LED light source and CCD video camera. The probe adapter tip mates with the connector and projects a crisp, clear image of microscopic debris and end-face damage on the LCD display.
Zoom levels of different optical fiber optic microscopes
* 100X
* 150X
* 200X
* 400X
Warnings
* Do not look into a fiber while the system laser is on
* Do not connect a fiberscope while the system laser is on
* Do not touch the end face of the fiber connector
* Lasers used in telecommunication systems are powerful enough to burn contaminants into the fiber end face. Always ensure the laser is turned off while performing the cleaning procedure.
Other special features of popular handheld fiber micrscopes
1. 100X magnification for viewing multimode connectors
2. Includes 2.5 mm connector "Universal Adapter" for FC, ST and SC style connectors
3. Oblique illumination provides good view of ferrule cleanliness and core condition
4. White LED illumination delivers long working life
Fiber Optic Connector Types
You may never need to clean the RJ45 connector for your computer's Ethernet network connection, then why do you need to clean a fiber optic connector if it serves the same purpose as a networking connection?
While, the answer lies in how optics work differently than electronics. In electronics, as long as you have a contact between two connectors, they work perfectly; or at least most of the time.
But for optics, light beams travel in straight lines, they bounce off whenever they hit anything and thus loss their energy.
So in order for a light beam to carry the information signal and travel thousands of miles of optical fiber, its path must be kept crystal clear, including fiber optic connectors in the network.
What part of a fiber optic connector should be cleaned, exactly?
OK. Now comes the critical part. What part in the fiber connector needs cleaning, exactly? The short answer is the ferrule's body and its end face. But what exactly is a ferrule?
Ferrule is a cylindrical and also the most critical part in an optical fiber connector. It is usually made from stainless steel or Zirconia.
Zirconia is a type of white colored ceramic which is an extremely refractory material. It offers chemical and corrosion inertness to temperatures well above the melting point of alumina. Zirconia is the preferred material for high quality fiber optic ferrules.
Ferrules have a tiny hole in the center which holds optical fiber in place. Then the fiber is scribed and precisely polished to flush with the end face of the ferrule.
Two fiber connectors can then mate to each other with a mating sleeve. When mated, two ferrules? end faces contact each other perfectly and thus pass light from one fiber to another.
Ferrules get dirty from dust, stain and debris made by constant plugging and unplugging after having been used for a while. These contaminations will block the light path and thus seriously reduce the light power and may disable the network connection.
To get a better sense of how a fiber optic connector could be contaminated, look at this tutorial: http://www.fiberoptics4sale.com/Merchant2/fiber-optic-cleaning.php
Is there only one method for fiber connector cleaning?
There are many different ways to clean a fiber optic connector. They are not exclusive but rather complementary to each other. When one method failed, you can always try another method. And that is why there are so many fiber optic supplies for cleaning fiber connectors available on the market.
1.Air spray. Air dusters are used to blow loose particles from optical fiber connector end face. Optic grade is more expensive. Air spray is a non-abrasive fiber optic cleaning method.
2.Lint-free wipes with isopropyl alcohol. The operator folds the lens paper (such as the lint free wipes) into 4~6 layers and lay it flat on a table. He then holds the connector vertically straight and cleans the end face in figure 8 motion.
3.Reel fiber optic connector cleaners. Connector reel cleaner is a dry cleaning method with a quick, reliable operation and uniform results. They use 2 micrometer weaved polyester cloth to clean optical fiber connectors. This is an abrasive fiber optic cleaning method but pad underneath cleaning cloth mitigates this significantly.
4.Stick or swab type cleaners. These specially built Cletop sticks come in 2.5mm and 1.25mm versions. They are designed for dry cleaning fiber optic connector mating sleeves, bulkhead adapters and receptacles.
5.In-situ cleaning. This semi-automated fiber optic cleaning method is specially designed for fiber optic connectors plugged in patch panels and hardware devices.
6.Pre-saturated or soaked wipes. Pre-saturated wipes are good for cleaning glass fiber or connector end faces. They are available in a convenient pre-saturated towelette. The towels are durable and non-linting. Pre-saturated wipes are a convenient option for field use.
Fiber Optics For Sale Co. offers all types of fiber optic supplies for fiber optic cleaning. Check it out by yourself at http://www.fiberoptics4sale.com
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