Polarizing film. Where is it used?

2024 Author: Priscilla Miln | [email protected]. Last modified: 2023-12-16 00:21

Many people have heard of such a useful coating as polarizing film. However, not everyone knows about its properties and scope. Today, thanks to the ability to make purchases through online services, it is not difficult to purchase a polarizing film both in Moscow and in Novosibirsk, Krasnoyarsk and other cities of Russia. The main thing is to find out all its properties before buying in order 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 threads of such a grating is equal to the length of the light rays. This allows one wave to pass in a certain plane.

Polarizing film transmits only that part of the light flux, which is parallel to its axis. This coating is created in two ways. The first involves spraying metal strips onto 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 presentedproducts can limit light output, reduce brightness, scatter rays, darken mirror and screen surfaces, as well as protect against direct sunlight.

Application

The use of such a coating as a polarizing film has many directions. Novosibirsk, Ufa, Yekaterinburg and other Russian cities use it for the same purposes.

Many drivers opt for sunglasses with lenses coated with polarizing film. And the ordinary consumer liked such inventions because of the comfort of viewing in sunny weather.

In the automotive industry, polarizing films are used to tint windows, rear-view mirrors, and windshields. This helps to protect against the glare of oncoming traffic or the bright sun.

Polarizing film for the monitor and other LCD displays has long been loved by users. This allows you to increase the contrast of the image. For screens and monitors, polarizing film in combination with special stereo glasses will create the effect of three-dimensional images.

For lens filters, the presented technique is also used. Even the windows of houses are protected with polarizing film to prevent blinding light from entering the room.

How film is made

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

Phosphotungstic acid may also be added to the product.

During the production process, the initial workpiece is stretched 5-7 times. Then the product is fired at a temperature of about 140 degrees.

This technology gives the required qualities to such a coating as a polarizing film. What is stretching for? This allows you to build the molecular orientation of the components.

The heat treatment prolongs the life of the product, making it resistant to heat and moisture. The equipment can have a variety of indicators, for which the polarizing film is processed by the presented method.

Types of films

Depending on the components used for the production of PVA film, there are 3 types of it. It can be a product containing dichroic rulers, polyvinylene units or polyiodine complexes.

According to the method of polarization, mechanical and electrical gratings are distinguished.

To increase or decrease the polarization mechanically, the grating strands are shifted relative to each other. The elements move mechanically, and the polarizing film moves. Manufacturers calculate how to tint glass by applying the correct angle of displacement of surfaces.

Electric polarization is considered a more promising method, as it does not require mechanical components. Light in such a product passes through a polarizer and liquid crystals. When current is connected, they turn in the direction of its flow. This is how the strands of the lattice are formed, which transmit the light flux.

Car polarization

When using a polarizing film for cars, you should approach this issue responsibly. Incorrect polarization can cause accidentsdue to insufficient visibility for the driver.

Polarizing film is applied to the windshield to prevent glare from oncoming traffic from entering the driver's eyes.

Very useful presented technology for the polarization of interior rear-view mirrors. It happens that the headlights of the car behind them illuminate them with a bright flash. If the driver at this moment looks in the mirror, he may be blinded. It will take time until the owner of the car can see perfectly again. And these few seconds he will have to go almost blindly. The film will help limit the glare from the headlights and maintain the driver's ability to see the road clearly.

Polarizing film for cars 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 activities.

It is convenient to work on any equipment with a display when only the user sees the data on its screen. It is very unpleasant when people around look curiously at the device interface.

Polarizing film is used to protect information. It is attached to the screen with an adhesive backing. If desired, it can be removed or put on the screen of a tablet or smartphone, only while on a trip.

The polarizing film for the monitor limits the passage of light rays that pass at an angle greater than 60degrees.

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

For each device, films of a certain format are produced.

Polarized glasses

Polarizing film for glasses helps protect your eyes from the blinding light emitted by machines and equipment. Glare emanating from various surfaces can not only impair the visibility of details, but also dazzle and impair eye he alth.

Therefore, in a variety of fields of activity, glasses with polarizing film protect vision. It is inside the lens.

Ordinary sunglasses do not remove glare from the surface of the water, snow, mirrors. To do 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 maintain eye he alth.

Polarized glasses reduce eye strain. The eyes are less tired. The contrast and clarity of the image are increased. And also such a product increases the safety of workers of certain professions. Drivers especially liked the polarized glasses.

Production of polarized lenses

Among the existing technologies for the manufacture of polarized lenses, the oldest is the use of mineral glass.

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

However, the newest and most promising technique is to place the film on the front glass. The polarizer is processed to improve its resistance to damage, abrasion. This allows the product to perform its polarization properties with the highest quality. Protective film coating increases its impact resistance.

Window film

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

The bright sun breaking into the room wakes you up early in the morning, and during the day it becomes unbearably hot in such a room. In order not to hang curtains or blinds on windows, there is a special way. Window tinting solves the problem of very bright natural light.

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

Polarizer enhances the resistance of glass to mechanical damage, scratches.

How to make a monitor film

Usually, the manufacturer supplies LCD monitors with a polarizing film. It can be glued to the monitor orjust tightly pressed with slats.

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

You need to purchase a film according to the size of the previous version. The old film is dismantled. If necessary, the adhesive is removed with a solvent. When 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.

Having completely cleaned the base, a new coating should be mounted.

DIY polarizing film must be positioned correctly. It matters where the front and back are. It is also important to keep the correct position of the sides. Next, parts of the monitor are assembled together.

Check polarization

There are several ways to make sure the polarizer is working properly.

You should take two films (or glasses lenses) and direct them against each other. Visibility through two coats should be perfect. 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 steering angle reaches 90 degrees, visibility should be zero. If after these actions the visibility remains the same, the product does not have polarization properties.

You can use the screen of a monitor, phone or tablet instead of the second film. When the film is rotated 90 degrees, the image should become significantlydarker.

Having considered the whole range of products that use polarizing film, one can realize the importance of this product for human he alth, as well as its safety. Understanding the principle of its structure and quality criteria, it will be easy to distinguish a polarizer from ordinary material.