Optical fiber used in collimation aiming scheme & fluorescence optical fiber temperature measurement system

Introduction to Fluorescent Fibers

1. The fluorescent fiber can receive light incident in any direction, instead of only receiving light from a certain range of the end face into the fiber (that is, the so-called numerical aperture problem). After the fluorescent substance receives light of a certain wavelength (stimulated spectrum), it is stimulated to emit light energy. The excitation peak wavelength is different from the radiation peak wavelength, a phenomenon known as Stokes shift. For fluorescent molecules, the Stokes frequency shift is about 100~200 nm, but this value is affected by other dopants. After excitation disappears, the continuity of fluorescence emission depends on the lifetime of the excited state

2. This luminescence usually decays exponentially, and the time constant of decay is called fluorescence lifetime or fluorescence decay time. Polystyrene (PS) and PMMA doped with fluorescent substances are used as the core layer of the fiber, and the fluororesin as the cortex fluorescent fiber has a normal light transmission function. The biggest feature is that it absorbs light from the side and emits light from the end face. There are red, yellow, green, etc.

Fluorescent fiber features:

1. Fluorescence has high luminous efficiency, long service life, soft light and any radiation cold light source

2. Fluorescent fiber is composed of fluorescent substances and some rare elements doped in the core and cladding. Fluorescent substances can absorb light in a specific wavelength range, make themselves excited, and then emit fluorescence in all directions, wherein the fluorescence whose radiation direction satisfies the condition of total reflection at the core-cladding interface will be transmitted along the fiber axis.

Applications of fluorescent fibers:

1. Point sight 551 sight, thermal sight, collimator sight, weapon sight

2. Fiber Optic Scope, Aiming Point Scope, Safety Fiber Optic, Universal Fiber Optic Scope, Scope Sunglasses Fuel Scope

3. China Red Dot Sight, Green Laser Hunting Laser Sight, Universal Fiber Optic Sight, Front and Rear Sight, Fiber Gun Sight Fiber Optic Sight, etc.

Application of fluorescent fiber in temperature measurement system:

Because fluorescence probes have many advantages that other temperature sensing probes cannot match, fluorescence sensing probes have not only been developed and applied in industrial temperature measurement, but also have broad application prospects in many fields such as biology and medicine.      

It is mainly used for:

 ①Temperature measurement of high-voltage instruments of electrical equipment, temperature measurement of engine diagnostic systems and transformer windings.

 ②Chemical process such as temperature measurement in highly corrosive environment or electrochemical treatment process, safe temperature measurement in the case of microwave radiation heating.

 ③Biological and medical fields such as temperature measurement during surgery, research on physiological response under electromagnetic radiation, etc.

Characteristics of fluorescence temperature measurement system in temperature measurement application

1. The fluorescent optical fiber temperature sensor probe is embedded in the device under test, and the optical fiber is used as the temperature sensing signal transmission medium, which has good insulation performance, strong anti-electromagnetic interference ability and fast response speed;        

2. Under the conditions of high voltage and high magnetic field, the hot spot temperature of the winding can be accurately measured online and in real time, which effectively overcomes the inherent defects of the traditional temperature measurement method, such as the inability to directly measure the hot spot temperature, poor electromagnetic immunity, and poor accuracy. Provide effective and reliable operation status information and decision support in complex electromagnetic environment such as transformers for the operation department in time, and improve the operation reliability of the power system;

3. The fluorescent optical fiber temperature sensor can easily realize the integrated fusion structure design with the transformer body, simplify the secondary information transmission loop, and improve the integration degree of the intelligent component and the transformer body.

Specification Sheet for Fluorescent Fibers:

The diameter of fluorescent fiber products is 0.5/0.75/1.0/1.5/2.0/3.0mm, etc.

Color can be customized

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