Low-melting point optical glass

An optical glass with low melting point technology, which is applied in the field of low melting point optical glass of fluorine, does not contain lead, arsenic, and bismuth, and can solve the problems of sharp fluctuations in optical indicators such as refractive index, unsuitability for large-scale production, and poor chemical stability, etc., to achieve Ease of melting and processing, stable glass, and low transition temperature

Inactive Publication Date: 2008-07-09
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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Problems solved by technology

Although the glass containing F can lower the transition temperature, it volatilizes violently during the melting process, resulting in sharp fluctuations in optical indicators such as refractive index and poor chemical stability, which is not suitable for large-scale production; As 2 o 3 Used as a fining agent to produce homogeneous glass of intrinsically good quality, but is harmful to the environment

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Embodiment Construction

[0016] In the glass produced in the present invention, each component is selected in the above content for the reasons described below. In the following description, the content range of each component is represented by weight percentage.

[0017] P 2 o 5 It is a network generator of glass and an essential component to maintain the stability of glass. Compared with silicate and borate glasses, P 2 o 5 It can impart excellent melting performance and stability to glass. In order to satisfy the optical performance, the amount of this component should be 18% or more, and if the amount of this component exceeds 40%, the desired refractive index cannot be obtained.

[0018] Nb 2 o 5 It is a very important component used to obtain high refractive index and large dispersion, and has the effect of improving the chemical stability of glass. However, if its content exceeds 40%, the transition temperature of the glass will increase, the stability will also deteriorate, and the hig...

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PUM

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Abstract

The invention relates to low melting point optical glass, belonging to the low melting point optical glass without lead, arsenic, bismuth and fluorine, which resolves the problem that the existing optical glass has high transformation temperature, insufficient chemical stability, big glass specific weight and the like. the technical scheme of the invention is that the content of percentage by weight comprises: P2O5 holding 18-40%, Nb2O5 holding 20-40%, TiO2 holding 0-10%, WO3 holding 0-15%, B2O3 holding0-15%, R2O holding 10-45%, RO holding 0-20%, Sb2O3 holding 0-1% and total content holding 100%. The glass of the invention does not contain lead, arsenic, bismuth and fluorine, the transformation temperature of which is low (Tg < 500DEG C), the glass is adaptable to precise compression, the refractive index is 1.65-1.85, Abbe number is 20-35, chemical stability is good, bending and separation property is good, and the glass is easy in melting and processing, low in density and comparatively light in color.

Description

technical field [0001] The invention relates to low melting point optical glass, especially low melting point optical glass without lead, arsenic, bismuth and fluorine. Background technique [0002] In recent years, the market trend in optical and optoelectronic technologies, such as: imaging, projection, telecommunications, optical communication technology and laser technology, has been increasingly miniaturized. This trend is evident from the continuous decline in the size of the final product. Lightweight products are a popular trend today. Through precise molding, the glass blank is directly pressed into an aspheric lens, which reduces the number of lenses, reduces the number of optical components such as lenses, and reduces the weight. Aspherical lenses made of optical glass with a refractive index (nd) of 1.65 to 1.85 and an Abbe number (γd) of 20 to 35 through precision pressing are very effective in optical path design and are widely used in various optical products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/19C03C3/16
Inventor 沈义梅李克炎张卫黄少林邓和平
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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