The term "reflector" has several meanings. In this article, we will consider the concept, device and principle of operation, scope and types. We will also take a closer look at the most common types of reflectors.
What is it?
Firstly, this 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.
Why do we need a reflector - a reflector
Reflectors are of 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 the LED reflector is designed to enhance light illumination. It works like this: the emitted light is reflected from the reflector andconcentrates on glass. It could be a headlight, a lens, or polarized glass.
Scope of application
LED reflectors are used in many areas:
- Like lighting in commercial establishments, restaurants in the form of decorative and special lighting.
- In galleries, libraries for highlighting objects that are sensitive to UV radiation and heat.
- Lighting of streets, buildings and overpass bridges.
- Other minimum settings.
Blue Minin 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 medical and psychosedative device. The design of the lamp is simple, it consists of an ordinary blue incandescent lamp, a reflective hemispherical lampshade and a cord with a plug. Blue infrared light is preferred because it warms the superficial layers of the skin. Rays are reflected and absorbed by tissues. Microcirculation is activated there, vascular permeability increases and metabolism improves, which achieves a therapeutic effect. Slags and other products of organic decay are excreted from the body. Typically, a reflector is used to warm the bridge of the nose, ears and heels. They can be treated for all inflammatory processes, bruises, sciatica and osteochondrosis, skin diseases and more.
During the blue lamp treatment, the patient should not feel pain and excessive heat. The lamp must be pointed straight atarea of the diseased area. The radiation site must be clean and free of grease. If the eyes or the bridge of the nose are irradiated, then the eyes should be closed, and it is better to remove contact lenses. Duration of treatment 20 minutes.
Reflectors. Device types
Recall what a reflector is - it is a reflector of light and radio and television waves in the form of a curved mirror (paraboloid of revolution) that focuses the rays in the desired area. They come in different 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 reflect electromagnetic (light) or sound waves. The reflective surface of reflectors is usually mirrored. The application is the development of radars, the use of phased array antennas and specialized tracking antenna systems. That is, it mainly concerns the military area.
Antenna reflector is a secondary radiator. In relation to the primary (that is, to the paraboloid), it is located opposite the main diagram (lobe of the radiation pattern of the receiving side) in order to increase the received signal. The direct-focus parabolic reflector antenna has long been effectively used in long-range satellite and space communications, measurements and recognition of quasars, neutron stars and other exotic objects.
The main lobe of the receiving signal is considered to be the area in the field of the radiation pattern, where the signal level and saturation of the EM field are maximumincreased.
Headlight reflector. Whereis used
For a clear and clear understanding of the design of the reflector device, let us explain: the headlight reflector consists of a smooth polished and concave surface, copper or glass, on which a layer of silver, a layer of chromium or aluminum is deposited by vacuum technology. It is designed to form a luminous flux of the required shape. Light is emitted by automotive lamps, which are divided into simple incandescent lamps, halogen lamps, xenon HID - lamps, LED lamps (LED - technology) and a new generation of optics - laser. 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 a directed stream.
Types of headlights
Depending on the design, car headlights are divided into several types:
- crystal headlights, i.e. headlights with segmented reflectors and clear glass or special plastic material;
- grooved headlights, that is, it is a type of headlight with a corrugated glass, a diffuser that directs and diffuses light;
- modular optics, which are sealed and independent optical (lens) elements;
- lens headlights or projector headlights. Their design uses a crystal lens with a converging effect.
All types of headlights listed are used in the automotive industry.
Reflector design:what is
Reflectors are mesh, mesh-parabolic, parabolic, rectangular concave, elliptical, corner and other developed forms. In the process of development, construction and design of technical devices, such a concept as reflector design is also used, which means a technical solution, design and construction of various types of functional reflectors. Standard designs are usually done on round or rectangular shapes. However, such forms can be replaced by other general devices that provide better reflection of electromagnetic light, sound, heat 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 also use special plastic analogues deposited with a shiny layer in vacuum installations. The 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 illumination area, you can use spherical or parabolic reflectors, or other reflector shapes may be preferred.
Conclusion
Once again, let's clarify what a reflector is: in the household, this is the name of the simplest infrared observer, consisting of a red bulb and a metal lampshade. To date, reflectors are widely used in various fields: in the field of satellite television and radio communications, astronomy, biology andmedicine, in the areas of agricultural and household purposes, as street lighting, hotels and other types of human activity. The use of composite materials in new antennas makes it possible to create optimal broadband receivers. Their disadvantage is that the level of the received signal is low, but this can be compensated by the built-in amplifier. Such antenna systems can completely replace traditional aerial ones.
