The concept of “reflector” has several meanings. In this article we will consider the concept, device and principle of operation, scope and types. And also in more detail we will analyze the most common types of reflectors.
What?
Firstly, it is a device for directional direct radiation and reflection of radio waves, located next to the antenna. Secondly, a reflector of infrared and light rays in the form of a parabolic polished surface. Irradiation with infrared and other radiation is used not only in medicine, but also as a means of hardening the body, as well as in other technical devices.
What is a reflector for?
Reflectors come in different types: Minin reflector; LED parabolic reflector and others. In the case of the LED type, diodes are placed in this device depending on its application. It is known that LED reflector is designed to enhance light illumination. It works like this: the emitted light is reflected from the reflector and concentrated on the glass. It can be a headlight, a lens or polarized glass.
Scope of application
LED reflectors are used in many areas:
- As a highlight in trading establishments, restaurants in the form of decorative and special lighting.
- In galleries, libraries for illuminating objects that are sensitive to UV radiation and heat.
- Lighting of streets, buildings and overpass bridges.
- Other minimal installation.
Blue Minin's Lamp
The "blue lamp" is known to many people. But few people know her second name. Minin's blue reflector is a device used in physiotherapy as an auxiliary therapeutic and psycho-sedative device. The design of the lamp is simple, it consists of a conventional blue incandescent lamp, reflecting a hemispherical lampshade and a cord with a plug. Blue infrared light is preferred because it warms up the surface layers of the skin. Rays are reflected and absorbed by tissues. It activates microcirculation, increases vascular permeability and improves metabolism, thereby achieving a therapeutic effect. Slag and other products of organic decay are released from the body. Typically, the reflector is used to warm the nose, ears and heels. They can be treated for all inflammatory processes, bruises, radiculitis and osteochondrosis, skin diseases and more.
When treating with a blue lamp, the patient should not feel pain and excessive heat. The lamp should be aimed strictly at the area of the sore spot. The irradiation site should be clean and degreased. If the eyes or nose bridge are irradiated, then the eyes should be closed and contact lenses should be removed. The duration of treatment is 20 minutes.
Reflectors Device types
Recall that such a reflector is a reflector of light and radio and television waves in the form of a curved mirror (rotation paraboloid), focusing the rays in the desired area. They are of various types and are used in various fields of technology: television and radio communications, space and astronomical radio antennas, satellite communications and more. They consist of one or more mirrors that provide reflection of electromagnetic (light) or sound waves. The reflective surface of the reflectors is usually mirrored. Application is the development of radars, the use of phased array antennas and specialized tracking antenna systems. That is, this mainly concerns the military field.
An antenna reflector is a secondary emitter. In relation to the primary (i.e., to the paraboloid), it is opposite the main diagram (the lobe of the receiving side radiation pattern) in order to increase the received signal. The direct focus parabolic reflector antenna has long and effectively been used in long-distance satellite and space communications, measuring and recognizing quasars, neutron stars and other exotic objects.
The main lobe of the receiving signal is considered to be the portion in the field of the radiation pattern, where the signal level and the saturation of the EM field are maximized.
Headlight reflector. Where is used
For a clear and clear understanding of the design of the reflector device, we explain: the headlight reflector consists of a smooth polished and concave surface, copper or glass, on which a silver layer, a layer of chromium or aluminum are deposited by vacuum technology. It is designed to form the luminous flux of the required shape. Automobile lamps emit light, which are divided into simple incandescent lamps, halogen lamps, xenon HID lamps, LED lamps (LED - technology) and a new generation of laser optics. On modern cars, reflectors have a structure similar to a cylindrical glass, where each segment illuminates its own section of the road. The purpose of the headlight reflectors is to concentrate the light emitted in all directions into the directional stream.
Headlights
Depending on the design, car headlights are divided into several types:
- crystal headlights, that is, headlights with segment reflectors and transparent glass or special plastic material;
- corrugated headlights, that is, it is a type of headlights with corrugated glass, a diffuser that directs and scatters the light;
- modular optics, which is a sealed and independent optical (lens) elements;
- lens headlights or headlights of a searchlight type. A crystalline lens with a collecting effect is used in their design.
All types of headlights listed are used in automobile manufacturing.
Design reflectors: what is
Reflectors are mesh, mesh-parabolic, parabolic, rectangular concave, elliptical, angular and other developed forms. In the process of development, construction and design of technical devices, the concept of reflector design is also used, which means technical solution, design and construction of various types of functional reflectors. Standard designs are usually carried out on round or rectangular shapes. However, such forms can be replaced by other general devices that provide better reflection of electromagnetic light, sound, thermal and other types of radiation.
To reflect and direct all types of waves incident on the active surface of the reflector, it is not necessary to use only mirrors. You can use special plastic counterparts deposited with a shiny layer in vacuum installations. Color and protective coating of devices is also of no small importance. Typically, modifications to the tuning and design of these devices use LED and laser technologies. In the field of lighting, spherical or parabolic reflectors can be used or other forms of reflectors may be preferred.
Conclusion
Let us once again clarify what a reflector is: the simplest infrared observer, which consists of a red bulb and a metal lampshade, is so called on the farm. To date, reflectors are widely used in various fields: in the field of satellite television and radio communications, astronomy, biology and medicine, in the fields of agricultural and household purposes, as street lighting, hotels and other human activities. The use of composite materials in the new antennas makes it possible to create optimal broadband receivers. Their disadvantage is that the level of the received signal is small, however, this can be compensated by the built-in amplifier. Such antenna systems can completely replace traditional aerial systems.