I want to know the grade and model of electric welding eye protection filter.

Color filter: It can adjust various colors in the spectrum.

Polarizer: Eliminate the shining reflection of light on the surface of an object.

Soft mirror: Soften light.

Special effect mirror: starlight, multi-shadow, medium gray, ultraviolet ray, infrared ray, etc.

2, according to the material

Color film filter: high transparency, many colors, low cost, but fragile and easy to fade.

Glass coated color filter: high transparency and many pigment grades, but the increase of thickness changes the focus and affects the clarity.

Colored glass filter: high transparency, light texture, will not change the focus of the lens, and is resistant to damp heat. But the pigment grade is slightly worse.

Liquid color filter: inject colored liquid into transparent container, change color at will, and put it in front of the camera, which is mostly used for scientific photography.

3, according to the pigment

Weak color filters: such as No.0 light yellow color filter and No.0 1 light yellow color filter.

Neutral filters: such as No.2 and No.3 yellow and No.65438 +0 orange, yellow-green and light green filters. It is essential to shoot scenery, flowers, bonsai and still life.

Strong color filters: such as No.2 and No.3 orange, No.4 yellow, deep red and No.2 red color filters. Taking landscape photos can eliminate the mist in the air perspective and make the field of vision particularly clear.

4. Special classes

Ultraviolet filter (UV mirror): It has little influence on image clarity, so it must be used in mountain photography, and the influence of blue and purple light can be eliminated in color photography.

Polarizing filter: the upper part is colored and the lower part is colorless, which is used to adjust the contrast between the brightness of the sky and the scene. It is best to use it to take photos of backlit scenery.

Infrared color filter: Absorbs all visible light in the spectrum and only allows invisible infrared light to pass through, which is used for infrared photography.

Fog mirror: used in landscape photography to increase the sense of space depth and aerial perspective and enhance the effect of fog. Backlight and side light have good high beam effect, while front light has little effect.

Medium gray filter: It can absorb various wavelengths of light and reduce the brightness of the scene without affecting the color contrast. It is used when shooting in extremely bright beaches, deserts and snow.

Change color filter: daylight film is shot in light, blue film such as Leiden 80 is used, light film is shot in sunlight, and Leiden 85 filter is used.

Extended data

Manufacturing material

In the process of manufacturing this kind of lens, some metal oxides, such as iron, diamond, chromium, strontium, nickel, manganese and some rare earth metal oxides, such as neodymium, are added to the formula of ordinary optical glass. These metal oxides can make glass selectively absorb electromagnetic waves in a certain band, such as cerium and iron oxides can absorb ultraviolet rays in large quantities.

Using this kind of glass lens can reduce the amount of some wavelengths passing through the lens and reduce or prevent the damage to the eyes. Protective lenses of different colors mainly absorb light of different colors. This kind of glasses is divided into two types, one is absorption type, the other is reflection type, the former is used most.

Generally, the lens is round, and the specifications are expressed by its diameter in mm, including φ48, φ50, φ52, φ56, φ60, φ65, φ70, etc. The most commonly used specifications are φ56, φ60 and φ65. Due to the popularity of large format, the use of large-size lenses such as φ70 is increasing.

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