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Optical glass, preparation method thereof and optical element

A technology of optical glass and optical components, applied in the direction of optical components, glass manufacturing equipment, glass pressing, etc., can solve the problems of unfavorable optical terminal products such as miniaturization, light weight, unfavorable transition temperature, high glass density, etc., and achieve chemical stability Excellent, simple preparation method, low dispersion effect

Active Publication Date: 2021-03-26
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Na 2 The introduction of O and MgO will make the R of the glass OH (S) becomes worse, and too high BaO will lead to higher glass density, which is not conducive to the miniaturization and light weight of optical terminal products, and higher CaO content will also make R P (S), R OH (S) worse, too much SiO 2 and too little B 2 o 3 Content is not conducive to the appropriate transition temperature T g and the relaxation temperature T s

Method used

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  • Optical glass, preparation method thereof and optical element
  • Optical glass, preparation method thereof and optical element
  • Optical glass, preparation method thereof and optical element

Examples

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preparation example Construction

[0066] The present invention also provides a method for preparing the optical glass according to the present invention, which includes the step of mixing the components of the optical glass.

[0067] Specifically, the preparation method of the optical glass according to the present invention includes the following steps: weighing them according to the specified ratio, mixing them into batch materials, melting them in a crucible made of platinum at a temperature of 1220°C to 1270°C, and waiting After the raw materials are melted into molten glass, the temperature is raised to 1290°C-1340°C and a stirrer made of platinum material is turned on for stirring and homogenization, and the stirring time is controlled at 5-10 hours. After the stirring is completed, raise the temperature to 1340°C-1380°C and keep it warm for 5-10 hours to clarify and make the bubbles fully float up, then lower the temperature to 1050°C-1150°C to pour or leak into the molding mold or molded, and finally th...

Embodiment 1-14

[0085] Embodiment 1~14 among the table 1-3 is that the present invention is used for illustrating and obtains refractive index (nd) and Abbe's number (υd) in the υd-nd coordinate system by A (1.80,54), B (1.80, 50 ), C (1.63, 61), D (1.63, 65) the embodiment of the lanthanum crown optical glass in the region formed by four points.

[0086] The preparation methods of the optical glasses of Examples 1-14 and Comparative Examples 1-3 of the present invention are as follows: Weigh them according to the specified ratio, mix them into batch materials, and melt them in a crucible made of platinum at a temperature of 1250°C After the raw materials are melted into molten glass, the temperature is raised to 1320°C and the stirrer made of platinum material is turned on to stir and homogenize, and the stirring time is controlled at 8h. After the stirring is completed, raise the temperature to 1360°C and hold it for 7 hours for clarification, so that the bubbles fully float up, then lower ...

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Abstract

The invention provides optical glass, a preparation method thereof and an optical element. Based on 100% of the total mass of the optical glass, the optical glass comprises the following components: 5-25% of SiO2; 15%-30% of B2O3; 16%-45% of La2O3; 1%-6% of Gd2O3; 1%-6% of Y2O3; 1%-15% of ZnO; 1%-4% of ZrO2; 2%-5% of Li2O; 0%-2% of Al2O3; 4%-24% of BaO; 0%-6% of SrO; 0%-9% of CaO; 0%-9% of LiF; 3-18% of BaF2; and 1-15% of AlF3; the refractive index nd of the optical glass ranges from 1.63 to 1.80, and the Abbe upsilon d of the optical glass ranges from 50 to 64. The optical glass disclosed bythe invention has the characteristics of low dispersion, easiness in softening, excellent chemical stability and suitability for production.

Description

technical field [0001] The invention relates to an optical glass, a preparation method thereof, and an optical element, in particular to a lanthanum crown optical glass, a preparation method thereof, and an optical element, and belongs to the field of optical glass. Background technique [0002] In recent years, in order to meet the high-pixel, small and light requirements of high-end digital products, the demand for lanthanum crown optical glass with the advantages of medium reflectivity, low dispersion, and low density is increasing. The reason is that such products are used in optical systems and When the high-dispersion glass is used in combination, it is beneficial to offset the special dispersion of part of the secondary spectrum, improve the resolution of the optical system, and improve the imaging quality. However, in recent years, in order to make the glass have the above properties, the Gd in the glass 2 o 3 , Y 2 o 3 , Nb 2 o 5 , ZnO component content is als...

Claims

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Application Information

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IPC IPC(8): C03C3/068C03B11/00G02B1/00
CPCC03C3/068C03B11/00G02B1/00
Inventor 霍金龙刘向东徐华峰杨爱清胡向平
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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