The lenses used in glasses can be of almost any color. Many people, when they see a person wearing glasses with colored lenses, probably think: is it just fashionable or do colored lenses perform any additional functions? For example, what are yellow glasses for? Let's look at the types and properties of these glasses.
Why special yellow glasses for drivers?
A sudden flash of oncoming headlights may well disorient the driver, causing temporary blindness. This significantly increases the likelihood of an emergency occurring on the route.
Glasses with yellow lenses Excellent blocking of light from any headlights (halogen, xenon and ordinary incandescent lamps).
Types of yellow glasses
Glasses with yellow lenses come in different types depending on their functional purpose.
The following models of similar products are produced:
- anti-glare;
- polarizing;
- photochromic;
- for night driving.
Each type of such glasses has its own distinctive features and characteristics.
How polarized yellow glasses work
These products are intended for daytime use and are usually used when driving in sunny weather.
Functioning of glasses with a similar effect is based on cutting off mainly polarized reflected radiation, which prevents the retina from perceiving the image. In addition to the usual bright light, drivers are very annoyed by glare, which is light reflected from the road surface, snow, water, windows and roofs.
Polarized glasses This color helps to effectively eliminate these unpleasant moments. The principle of operation of such products is that they do not transmit reflected rays with horizontal polarization. Thanks to this effect, the image is perceived more clearly than without the use of such glasses.
Protective properties of glasses with yellow lenses
Similar products have such protective properties:
Every filter that reduces background light, increases the contrast of the visible image and increases its clarity. For human eyes, it is very important to preserve or restore (fog, darkness) the yellow component of light, since in the daytime the maximum spectral visibility (perception by the eye) is equal to the wavelength of 555 nm. The main wavelength band of spectral visibility is 500-600 nm, therefore, it fully includes the yellow component of 570-590 nm.
Bad weather conditions with poor visibility (rain, dusk and fog). Nature provides for a maximum shift in spectral visibility to the blue-green region. It is required to deceive the human eyes and brain - to direct color perception to the yellow (daytime) region.Based on the spectral transmittance of coatings for glass and plastic lenses, part of the blue-green region of the spectrum is not suppressed. Color loss are observed only in small quantities, despite the fact that there is a significant suppression of blue-white background illumination. When using such glasses, comfort significantly improves and image sharpness increases.
Halogen lamps have an impressive blue component of the emitted light. Yellow lenses simply filter out a significant part of the blue component.
Incandescent lamps. Yellow glass not only transmits, but also largely reflects the yellow component, absorbing the blue. This is exactly how the effect of neutralizing the headlights of oncoming vehicles manifests itself.
Purpose of yellow glasses for driving at night
Drivers of various vehicles do not always have to drive exclusively during the day or in clear weather. Glasses with yellow lenses are simply irreplaceable on the night track. They help you see the road clearly in bad weather (rain, snow or fog), as well as when visibility is not clear enough at dawn or dusk.
Such glasses help drivers better navigate the road because:
- allow you to improve the difference in colors due to the fact that they perfectly transmit light in the yellow-green part of the spectrum;
- help optimize the perception of the environment in the yellow part of the spectrum;
- increase contrast due to partial absorption of the violet-blue part of the radiation spectrum;
- reduce drowsiness and reduce eye fatigue (you don’t have to squint and strain your eyes once again), protecting the driver from falling asleep prematurely.
Tips for choosing the right yellow glasses for night driving
When choosing products of this kind, it is necessary to pay attention to the quality of the glass. Yellow lenses should perfectly emphasize the contrast of objects.
As for the material from which the lenses are made, it is recommended to give preference to plastic or polymer options.
Important! Lenses made of glass are contraindicated for drivers. Upon impact, they can break into many pieces and seriously damage the driver's face.
Certain models of such glasses provide for changing lenses.
The convenience of such an accessory also plays an important role. The bow should be narrow and fit snugly on the bridge of the nose, but not put pressure. There should be no feeling of discomfort when using such glasses. But such products should not be too loose either. If the glasses keep falling off, the driver will regularly take time off the road to put them back in place. This is especially undesirable at night in conditions of rather limited visibility.
0
