Polarizing film. Where is it used?

Many people have heard of such a useful coating as a polarizing film. However, not everyone knows about its properties and scope. Today, thanks to the ability to make purchases through online services, to acquire polarized film in Moscow, and in Novosibirsk, Krasnoyarsk and other cities of Russia will not be difficult. The main thing is to learn all its properties before buying to be able to use it correctly for a variety of purposes.

Film properties

The concept of polarization implies the limitation of light waves by passing them through a special lattice. The distance between the filaments of such a lattice is equal to the length of the light rays. This allows you to skip one wave in a certain plane.

A polarizing film passes only that portion of the light flux that is parallel to its axis. This coating is created in two ways. The first implies the deposition of metal bands on the polymer base . The second method uses the technology of iodine-polyvinyl films. Both methods are widely used for a variety of purposes.

With the help of the presented product, you can limit the light flux, reduce brightness, scatter rays, darken mirror and screen surfaces, and protect yourself from direct sunlight.

Application

Many directions have the use of a coating such as a polarizing film. Novosibirsk, Ufa, Yekaterinburg and other cities of Russia use it for the same purposes.

Many drivers choose sunglasses, the lenses of which are covered with a polarizing film. Yes, and the usual consumer, such inventions were liked because of the comfort of viewing in sunny weather.

In the automotive sphere, polarizing films are used for toning of glasses, rear-view mirrors, windshields. This helps protect against glare of oncoming traffic or bright sun.

Polarization film for the monitor and other LCDs has long been loved by users. This allows you to increase the contrast of the image. For screens and monitors, a polarizing film in combination with special stereoscopes will create an effect of image volumetry.

For the lens filters, the technique is also applied. Even the windows of houses are protected with a polarized film to avoid blinding light in a room that comes from outside.

How to create a film

The product is made of polyvinylene. To do this, use polyvinyl alcohol (PVA).

The composition of the product can also be added with phosphoric-tungstic acid.

In the production process, the initial workpiece is stretched 5-7 times. The product is then burned at a temperature of about 140 degrees.

This technology gives the required qualities to a coating such as a polarizing film. What is the purpose of stretching? This makes it possible to arrange the molecular orientation of the components.

Heat treatment prolongs the durability of the product, making it resistant to heat and moisture. The equipment can have very different parameters, for which the polarization film is processed by the presented method.

Types of Films

Depending on the components used to produce PVA-film, there are 3 of its varieties. This may be an article containing dichroic rulers, polyvinylenic units or polyiodic complexes.

The method of polarization distinguishes between mechanical and electrical grids.

To increase or decrease the polarization mechanically, the grating threads are displaced relative to each other. Elements move mechanically, and the polarizing film moves. How to tint glass, calculate the manufacturers, applying the correct angle of displacement of surfaces.

Electrical polarization is considered a more promising method, since it does not require mechanical components. Light in such a product passes through a polarizer and liquid crystals. When the current is connected, they rotate in the direction of its flow. In this way, the filaments of the grating that transmit light are formed.

Polarization for car

Applying a polarizing film for cars, it is necessary to approach this question responsibly. Incorrect polarization can cause an accident because of insufficient visibility for the driver.

Polarizing film on the windshield is applied to eliminate the glare from the oncoming traffic in the eyes of the driver.

Very useful technology presented for the polarization of interior rear view mirrors. It happens that the headlights of the car driving behind the backlight flash them brightly. If the driver at this moment looks in the mirror, he can be blinded. It takes time until the owner of the car can see again perfectly. And these few seconds he will have to go almost blind. The film will help limit the flow of blinding rays from the headlights and keep the driver's ability to see the road clearly.

Polarizing film for auto is also used for window tinting on doors and rear.

Film for screens of electronic devices

To maximize the productivity of a person working on a computer, you should ensure the comfort of his work.

Work on any equipment with a display is convenient when the data on its screen is visible only to the user. It is very unpleasant when others are curious about the interface of the device.

To protect the information, a polarizing film is used. It is attached to the screen with a glue base. If desired, it can be removed or put on the screen of a tablet or smartphone, only while on a trip.

Polarization film for the monitor limits the passage of light rays that travel at an angle greater than 60 degrees.

The presented products have moisture resistance and withstand temperature changes. The film itself is able to protect the screen from mechanical damage and scratches, since polycarbonate is a fairly strong material.

For each device produce films of a certain format.

Polarized glasses

A polarizing film for glasses helps protect the eyes from blinding light, which radiate machines and equipment. Glare, coming from different surfaces, can not only worsen the visibility of details, but also dazzle, disrupt the health of the eyes.

Therefore, in various fields of activity, vision is protected by glasses with a polarizing film. It is inside the lens.

Normal sunglasses do not remove the glare coming from the surface of water, snow, mirrors. For this, they are combined with a coating such as a polarizing film. In Krasnoyarsk, Sochi, Moscow and other cities of our country, many drivers, workers of various professions and ordinary citizens use such glasses to preserve eye health.

Polarizing glasses reduce eye strain. Eyes less tired. The contrast and sharpness of the image are increased. And also such product raises safety of work of workers of the certain trades. Particularly fell in love polarizing glasses drivers.

Production of polarizing lenses

Among the existing technologies for manufacturing polarizing lenses, the oldest is the use of mineral glass.

Nowadays this method is used extremely rarely. More often, the technology of lamination with organic substances (CR-39). A polarizing film is inserted between two lens webs. This helps to avoid delamination.

However, the newest and most promising technique is the placement of film on the front glass. Polarizer is processed to improve its resistance to damage, abrasion. This allows the product to perform its polarization properties as high as possible. The protective coating of the film increases its resistance to shocks.

Film for windows

For the well-being of a person in the room, the level of illumination, its intensity and naturalness matters. Comfortable light is good for eye health and even for the nervous system.

The bright sun, bursting into the room, wakes up early in the morning, and in the daytime it becomes unbearably hot in such a room. In order not to hang windows with curtains or blinds, there is a special way. Tinting the glass solves the problem of very bright natural lighting.

Polarizing film for windows reduces solar energy by 65% without deterioration of light transmission. This coating creates a certain protection against the thermal conductivity of the glass, which helps maintain a comfortable indoor climate.

The polarizer enhances the resistance of the glass to mechanical damage, scratches.

How to make a film for a monitor

Usually LCD monitors are supplied by the manufacturer with a polarized film. It can be glued to the monitor or simply tightly pressed with straps.

If necessary, replace this product, you need to pay attention to the technology of such a process.

You need to purchase the film according to the size of the previous version. The old film is dismantled. If necessary, the adhesive is removed with a solvent. Changing the polarizing film with your own hands, you need to make sure that the solvent does not get on the plastic elements of the monitor.

Completely clean the base, you must mount a new coating.

The polarizing film must be properly positioned by the hands. It matters where the front and back are. As well as it is important to maintain the correct position of the parties. Then the parts of the monitor are put together.

Polarization check

To verify the correct operation of the polarizer, there are several ways.

You should take two films (or glasses lenses) and send them against each other. Visibility through two layers should be ideal. Then on the first lens you need to mentally draw a perpendicular axis. The second film (lens) should be rotated around an imaginary axis. When the angle of rotation reaches 90 degrees, visibility should become zero. If after these actions visibility has remained the same, the product does not have polarization properties.

Instead of the second film, you can use a monitor screen, a phone or a tablet. When you rotate the film 90 degrees, the image should become significantly darker.

Having considered the whole range of products in which a polarizing film is used, one can realize the importance of this product for human health, as well as its safety. Understanding the principle of its design and quality criteria, it will be easy to distinguish the polarizer from ordinary material.