Safety glasses are a kind of glasses that play a special role, and the glasses with different needs in different occasions are used. Such as surgical glasses for hospitals, welding glasses for electric welding, laser protective glasses for laser engraving, etc. Protective glasses are also called labor protection glasses in industrial production. They are divided into two categories: safety glasses and protective masks. Their function is to protect the eyes and face from electromagnetic radiation such as ultraviolet rays, infrared rays and microwaves, dust, smoke, metal and sand. Damage from stone debris and chemical solution sputtering.
Safety glasses classification
1. Protective glasses against solid debris, mainly used to prevent mechanical damage to eyes caused by metal or sand debris. The spectacle lens and spectacle frame should be strong and resistant to shock. There are edging around the frame, and there should be ventilation holes on it. The protective lens can be toughened glass, colloidal bonded glass or copper mesh protective glasses.
2. Protective glasses against chemical solutions are mainly used to prevent chemical damage to eyes caused by irritating or corrosive solutions. Ordinary flat lenses can be used, and the frame should be covered to prevent splashing of the solution. Usually used in laboratories, hospitals and other places, general medical glasses can be used universally.
3. Anti-radiation protective glasses, used to protect the eyes from excessive ultraviolet rays and other radiation. The lens is made of special glass that can reflect or absorb radiation, but can transmit certain visible light. The lenses are coated with bright chromium, nickel, mercury or silver metal films, which can reflect radiation; blue lenses absorb infrared rays, yellow-green lenses absorb both ultraviolet and infrared rays, and colorless leaded lenses absorb X-rays and gamma rays. For example, common welding glasses require relatively low transmittance of the lens, so the color of the lens is mostly ink; laser protective glasses, as the name suggests, can prevent the radiation of laser to the glasses, so the requirements on the lens are very high, such as The choice of light source, attenuation rate, light reaction time, optical density, light transmission effect, etc., different nanometer (nm) lasers need to use different wavelength lenses.
Application:
Surgical glasses for hospitals, welding glasses for electric welding, laser protective glasses for laser engraving, etc.
How to Choose
There are many types of safety glasses, including dust-proof glasses, impact-proof glasses, chemical-resistant glasses, and anti-light radiation glasses. The first three glasses look like the lenses are colorless glass, but in fact, due to the different protection, the characteristics of the lenses are obviously different.
Some workers engaged in industrial production need to wear glasses for operation. These glasses are not for decoration and fashion, but for protecting eyes from harmful factors. Therefore, such glasses are called safety glasses.
Workers engaged in electric welding, gas welding, steel making, and glass blowing should wear anti-arc radiation glasses. However, the lenses of arc-proof radiation glasses have dark and light colors, which are designed according to different requirements. The selection should be based on the strength of the arc during operation. The intensity of the arc and the color should be deep; otherwise, light-colored lenses should be selected. If the arc light is strongly worn with light-colored goggles, some infrared rays will stimulate and damage the eyes through the lens, and occupational cataracts will occur in the long term; otherwise, the arc light is weak and wearing dark safety glasses for a long time will greatly reduce vision.
Therefore, every worker who needs to wear protective glasses should understand the harmful factors of his working environment, wear appropriate safety protective glasses, and should not wear a pass.
Dustproof glasses are used in environments with a lot of dust, and the general lens fastness requirements are not high. No matter the eye mask type or the flat mirror type, they are made of general flat glass lenses. The anti-impact glasses are used to prevent the small particles from flying out from piercing the eyes. The lenses require impact resistance. For example, the lathes, sanders, and stone workers should wear anti-impact glasses. If these workers wear general dust-proof glasses, then The iron sand and crushed stone are smashed when they strike the glasses, and the eyes will be more damaged. The lenses of chemical-resistant glasses are resistant to acids and alkalis and corrode, which is not available in other glasses.
Notice:
1. The selected goggles should use products qualified by the product inspection agency;
2. The width and size of the goggles should be suitable for the user's face shape;
3. Roughly worn lenses and damaged frames will affect the eyesight of the operator and should be replaced in time;
4. The goggles should be used by someone to prevent infectious eye diseases;
5. The filter and protective sheet of the welding goggles should be selected and replaced according to the required operation;
6. Prevent heavy falls and pressure, and prevent hard objects from rubbing lenses and masks.
