Plastic Fiber Optics Technologies
Plastic Fiber Optic
Plastic Fiber OpticPlastic is the general common term for a wide range of synthetic or semi synthetic organic amorphous solid materials used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce costs.
There are two types of plastics: thermoplastics and thermosetting polymers. Thermoplastics will soften and melt if enough heat is applied; examples are polyethylene, polystyrene, polyvinyl chloride and polytetrafluoroethylene (PTFE) Thermo sets can melt and take shape once; after they have solidified, they stay solid.
Types of Plastic
Cellulose-based plastics Bois Durci is a plastic moulding material based on cellulose. It is made from finely ground wood flour mixed with a binder, either egg or blood albumen, or gelatine.
Bakelite Bakelite was the first true plastic. It was a purely synthetic material, not based on any material or even molecule found in nature. It was also the first thermosetting plastic.
Polystyrene and PVC Polystyrene is a rigid, brittle, inexpensive plastic that has been used to make plastic model kits and similar knick-knacks. PVC in its normal form is stiff, strong, heat and weather resistant, and is now used for making plumbing, gutters, house siding, enclosures for computers and other electronics gear
Nylon Nylons still remain important plastics, and not just for use in fabrics. In its bulk form it is very wear resistant, particularly if oil-impregnated, and so is used to build gears, plain bearings.
Rubber - Natural rubber is an elastomer (an elastic hydrocarbon polymer). This a form of natural rubber heated with, mostly, sulfur forming cross-links between polymer chains (vulcanization), improving elasticity and durability.
Light guides conduct the flow of light from a light source to a point of use. They are used to illuminate areas that are too small or too hazardous to permit the installation of a light bulb. There are two basic types of light guides: Plastic light guide and Glass light guide .Plastic light guides have a flexible outer sheath and a light-conducting core. Fiber optic light guides consist of a non-coherent bundles of optical fibers. The fibers at each end of the bundle are tightly compressed, cut perpendicular to the axis of the fibers, and polished to permit light to pass into and out of the bundle. Plastic or PMMA(Poly methyl methacrylate) F.O light guides are less flexible than flexible Glass F.O , but are well-suited for the transmission of light in the visible and near-infrared range .Plastic light guides have little luminous loss over distance and are better suited for the transmission of UV light. Most plastic and fiber optic light guides are rigid and straight, rigid and bent, or flexible. Multi-leg devices are split along the length of the light guide so that the ends of the fibers extend separately to illuminate different points from a single light source.
Selecting light guides requires an analysis of physical and performance specifications. Physical specifications include length, diameter, and termination method. Some light guides are terminated with a threaded or unthreaded ferrule, a tube-like mechanical fixture that confines the stripped end of a fiber bundle. Others are unterminated devices. Performance specifications for light guides include wavelength, acceptance angle, bend angle, and numerical aperture. Acceptance angle is the maximum angle measured from the axis within which light is accepted or emitted by the light guide and transmitted along its length. Bend radius is the smallest bend that fibers can withstand before fracture. Numerical aperture is a calculated, optical value that indicates a devices ability to collect light over a range of input angles. It is equal to the sine of the acceptance angle. For fiber optic light guides, numerical aperture depends upon the core and cladding indexes of refraction.
General Characteristics of Plastic Light guides & Fibers.
Fiber Diameter : 0.25, 0.50, 0.75, 1.0, 1.5, 2.0, and 3.0 millimeters
Numerical Aperture : 0.50 NA
Operating Temperature : Up to 70 C
LG Diameter : As required
LG Lengths : Standard 12 inches and 1 metre ( Max. up to 25 metres)
Types : Individual, Bifurcated, Multicoated, Ring and Line
End Coupling : Aluminium, Brass, Stainless Steel or Customized
Coupling Type : Straight-Unthreaded or Threaded, Angled-Unthreaded or Threaded or Customized
Sheathing : PVC, Silicone, SS Monocoil, SS Interlock, SS Interlocked with PVC or Silicone layer or Customized.
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