阅读说明：本技术 一种光学玻璃 (Optical glass ) 是由 丁斐 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种光学玻璃,其特征在于：其组成按重量百分比表示,包括：10-30％的SiO-2、3-18％的B-2O-3、20-40％的La-3O-2、5-10％的TiO-2、5-20％的ZrO-2、5-8％的Y-2O-3、1-5％的Li-2O、10-20％的Nb-2O-3、5-10％的WO-3,其余为杂质。本发明具有稳定性好,使用寿命长的特点。(The invention relates to an optical glass, which is characterized in that: the composition is expressed by weight percentage and comprises: 10-30% of SiO 2 3-18% of B 2 O 3 20-40% of La 3 O 2 5-10% of TiO 2 5-20% of ZrO 2 5-8% of Y 2 O 3 1-5% of Li 2 O, 10-20% of Nb 2 O 3 5-10% of WO 3 And the balance impurities. The invention has the characteristics of good stability and long service life.)

1. An optical glass characterized in that: the composition is expressed by weight percentage and comprises: 10-30% of SiO₂3-18% of B₂O₃20-40% of La₃O₂5-10% of TiO₂5-20% of ZrO₂5-8% of Y₂O₃1-5% of Li₂O, 10-20% of Nb₂O₃5-10% of WO₃And the balance impurities.

2. An optical glass according to claim 1, wherein: the impurity is Na₂O、CaO、ZnO、Gd₂O₃And Ta₂O₅。

3. An optical glass according to claim 2, wherein: the Gd₂O₃And Ta₂O₅The content of (A) is less than 2%.

4. An optical glass according to claim 1, wherein: the refractive index of the optical glass is 1.77-1.78, and the Abbe number is 38-39.

5. An optical glass according to claim 1, wherein: the density of the optical glass is less than 3.0g/cm³The glass transition temperature is 600 ℃ or lower.

6. An optical glass according to claim 1, wherein: the crystallization temperature of the optical glass is below 1000 ℃.

Technical Field

The invention relates to the technical field of glass, in particular to optical glass.

Background

Optical glass is a glass material used for manufacturing lenses, prisms, mirrors, etc. in optical instruments or mechanical systems. In recent years, with the increasing popularity of digital cameras, digital video cameras, camera phones, and the like, the demand for optical glass has increased, and higher requirements have been placed on the performance of optical glass.

The prior art can not obtain ideal optical constants by improving the refractive index difference of the glass; on the other hand, the glass has poor chemical stability, and is easily affected by moisture or corrosion in subsequent processing or use environments, so that the use is affected.

Disclosure of Invention

The invention aims to solve the technical problem of providing the optical glass which has good stability and long service life.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an optical glass having a composition, expressed in weight percent, comprising: 10-30% of SiO₂3-18% of B₂O₃20-40% of La₃O₂5-10% of TiO₂、5-20% of ZrO₂5-8% of Y₂O₃1-5% of Li₂O, 10-20% of Nb₂O₃5-10% of WO₃And the balance impurities.

Further, the impurity is Na₂O、CaO、ZnO、Gd₂O₃And Ta₂O₅。

Further, the Gd₂O₃And Ta₂O₅The content of (A) is less than 2%.

Further, the refractive index of the optical glass is 1.77-1.78, and the Abbe number is 38-39.

Further, the density of the optical glass is lower than 3.0g/cm³The glass transition temperature is 600 ℃ or lower.

Further, the crystallization temperature of the optical glass is below 1000 ℃.

The invention has the beneficial effects that: the invention has low cost and good product quality, does not contain harmful substances, and has the effect of protecting the environment; and the glass has good chemical stability, and cannot be affected with damp or corroded in subsequent processing or use environments, so that the service life is prolonged.

Detailed Description

An optical glass having a composition, expressed in weight percent, comprising: 10-30% of SiO₂3-18% of B₂O₃20-40% of La₃O₂5-10% of TiO₂5-20% of ZrO₂5-8% of Y₂O₃1-5% of Li₂O, 10-20% of Nb₂O₃5-10% of WO₃The balance of impurities, wherein the impurities are Na₂O、CaO、ZnO、Gd₂O₃And Ta₂O₅. Wherein Gd₂O₃And Ta₂O₅The content of (A) is less than 2%, the cost is moderate, the cost is low, and the refractive index difference of the glass can be improved so as to obtain an ideal optical constant. The refractive index of the optical glass is 1.77-1.78, Abbe number is 38-39, and the density of the optical glass is less than 3.0g/cm³Glass transition temperature of 600 ℃ or lower, and crystallization temperature of optical glassBelow 1000 ℃.

3 groups of optical glass are prepared according to the following components by mass percent, 3 groups of optical glass correspond to the examples 1-3,

the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment according to the present invention are within the scope of the present invention.