Goggles, to avoid radiation damage to the eyes. This kind of glasses is divided into two categories, one for the absorption type, one for the reflective type, the former used most.
The so-called goggles are a kind of filter that can be changed through light intensity and spectrum. To avoid radiation damage to the eyes, the most effective and most commonly used method is to wear protective glasses. This kind of glasses can absorb some wavelengths of light, and let other wavelengths of light through, Safety Glasses so have a certain color, the color is through the light color. One for the absorption type, one for the reflective type, the former used the most.
Goggles manufacturing materials
This lens is made in the general optical glass formula and then add part of the metal oxides, such as iron, drilling, chromium, strontium, nickel, manganese and some rare earth metal oxides such as neodymium and so on. These metal oxides allow the glass to selectively absorb electromagnetic waves in a certain band of light, Safety Glasses such as cerium and iron oxides, which absorb large amounts of ultraviolet light. The use of this glass lens can reduce the amount of certain wavelengths through the lens to reduce or prevent damage to the eye. Different colors of protective lenses can absorb different colors of light. Safety Glasses This kind of glasses is divided into two categories, one for the absorption type, one for the reflective type, the former used most.
The lens is generally round, the specifications of its diameter, the unit is mm, φ48, φ50, φ52, φ56, φ60, φ65, φ70 and so on. The most commonly used for the φ56, φ60, φ65 three specifications. Due to the popularity of large frames, Safety Glasses so that the use of large lenses such as φ70 increased.
Goggles Lens size
Wool processing after the shape of the glasses in line with the lens, the size and shape of the natural curve according to the curve of the curve. The lens should indicate the horizontal direction and the nasal side, Safety Glasses otherwise the asymmetric shape of the lens after rotation will become completely different shape of the other. The lens size is represented by both the reference line length and the reference line height (reference line method), ie AA '× B'B, in mm (for example, 46 × 40); or with an external rectangle horizontal and vertical dimensions Box method).
Absorbent goggles are used to absorb light from certain wavelengths of light to reduce the intensity of light entering the eye.
Shade glasses goggles, also known as sunglasses, visible light transmission rate of about 20%, the absorption of ultraviolet and infrared better. There are light green, light gray, Safety Glasses light tea and other colors, used to create shade and snow work protective glasses. Which light gray lenses on the color of the smallest impact; light tea glasses so that the blue sky looks darker, so that the green light through the reduction; light green lenses to reduce the red light.
Gas welding with eye protection glasses
The colorants used in this lens are mainly iron oxide, cobalt oxide, etc., yellow-green, can absorb all the wavelength of 500urn light waves, visible light transmittance of 1% or less, only a small amount of infrared through. Safety Glasses This kind of glasses is specially designed for gas welding operation.
Welding of ultraviolet light, the short-term exposure to the eye can cause corneal and conjunctival tissue damage (28nm light the most serious). Resulting in strong infrared rays can easily cause eye crystal opacity. Welding goggles can be very good to block the above infrared and ultraviolet. This lens is based on optical glass, Safety Glasses the use of iron oxide, cobalt oxide and chromium oxide and other colorants, in addition to adding a certain amount of cerium oxide to increase the absorption of ultraviolet light. Appearance is green or yellow-green. Can all block ultraviolet, infrared transmittance <5%, visible light transmittance of about 0.1%.
There are two kinds of glasses, one for the iron oxide and cobalt oxide coloring, use it to see the filament for the purple, the other is copper oxide, manganese oxide coloring, use it to see the filament is white. They can all absorb 500-600nm (human eye visible light sensitive area) band dazzling glare, the light transmittance at 400nm below 12%, also have some absorption of ultraviolet light for a variety of industrial high-temperature furnace before the operation Personnel wear.
5, dark red glass glasses This lens is a cadmium sulfide, Safety Glasses sulfur selenium cadmium coloring of the deep red glass, it can absorb the wavelength of 600nm below the band of all the light. It can be used as a goggles for medical or industrial personnel operating X-ray fluoroscopy equipment.
Laser protection glasses
There are two forms of this kind of glasses, namely, reflective and absorption, the former surface of the vacuum coating method using a layer of metal film, the wavelength of 532nm, 694nm and 1060nm laser band reflectivity greater than 99.5%; the latter lens 1060nm laser band can be fully absorbed. The lens must be enclosed with a closed or semi-enclosed frame to prevent the laser from penetrating the lens into the eye. Can be used as a laser operator's protective glasses.
Microwave protection eyepiece
Microwave is a wavelength of about 1nm-lM electromagnetic waves, it can also cause harm to people, especially the eyes.
If the role of strong microwave, can cause eye fatigue, dry eyes and dizziness, and even lead to crystal opacity, cataract and retinal damage. Its protection is the use of the lens surface spray tin tetrachloride and can improve the conductivity of the metal compounds in the lens surface to form a multi-layer conductive film, played a role in shielding the microwave. Due to microwave can bypass the lens into the eye, the frame should also be shielded, in order to prevent microwave damage to the eyes.