Material for passing by ultraviolet or near-ultraviolet and use thereof

Abstract

The invention relates to a material for ultraviolet rays or near ultraviolet rays to pass through and application thereof. The material is suitable for most or part of 200 nanometer light rays to pass through with a high and stable light penetration rate and comprises silicon dioxide, oxyhydrogen radicals, ferrum, sodium and other contents, the weight proportion of the silicon dioxide is from 95 percent to 99.9 percent, the proportion of the oxyhydrogen proportion is higher than 0 ppm and lower than 7 ppm, the proportion of the ferrum is higher than 0 ppm and lower than 1.7 ppm, and the proportion of the sodium is higher than 0 ppm and lower than 4.4 ppm. The other light permeable material is suitable for most or part of light rays of at least 200 nanometers to 400 nanometers to pass through with a high and stable light penetration rate, and comprises silicon dioxide, oxyhydrogen radicals, ferrum, sodium and other contents, the weight proportion of the silicon dioxide is from 95 percent to 99.9 percent, the weight proportion of the oxyhydrogen radicals is higher than 0 ppm and lower than 10 ppm, the weight proportion of the ferrum is higher than 0 ppm and lower than 1.5 ppm, and the weight proportion of the sodium is higher than 0 ppm and lower than 2.5 ppm.

Description

technical field [0001] The invention relates to a light-permeable material, especially a material through which ultraviolet or near ultraviolet light beams can pass. Background technique [0002] It is known that when optical glass (optical glass) allows ultraviolet light to pass through, its light transmittance (lighttransmittance) will decrease rapidly for certain light wavelengths (such as 365nm), which is not conducive to the application of ultraviolet light. Absorption (light absorption) and heat generation are considerable, which will cause changes in physical properties and affect other applications. In order to avoid the above problems, silica glass is used to replace the known optical glass, but when ultraviolet light passes through the silica glass, chromatic aberration occurs. Although ultraviolet laser beams with a narrower spectral width (spectrum width) have been proposed to overcome the above problems, ultraviolet laser beams (such as wavelengths of 360-150nm...

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Problems solved by technology

[0004] There is another material commonly known as "iron-free glass", which claims to provide better light transmittance, but to achieve iron-free conditions, the process is more complicated, the cost is higher, and yellowing and ozone are unavoidable ( ozone) may not be suitable for all applications

[0005] Other known technologies have also been proposed to overcome the above-mentioned difficulties, but either the process uses a temperature above 1000°C, the cost is too high, or the product cannot avoid the gradual degradation of optical properties (caused by the passage of ultraviolet light beams), and the light transmittance is not enough Solid issues with great room for improvement

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