Dense lanthanum flint optical glass as well as preparation method and optical element thereof

An optical glass, flint technology, applied in optical components, glass manufacturing equipment, glass pressing, etc., can solve the problem of glass devitrification resistance and chemical stability deterioration, glass crystallization performance deterioration, damage to glass network structure, etc. problems, to achieve the effects of low cost, weight reduction, and low crystallization temperature

Active Publication Date: 2017-10-13
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, it contains the expensive Ta2O5 component as an essential component and Li which will destroy the glass network structure and deteriorate the crystallization performance of the glass. 2O component
[0010] patent application CN1510002A discloses that the refractive index nd is 1.75~1

Method used

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  • Dense lanthanum flint optical glass as well as preparation method and optical element thereof
  • Dense lanthanum flint optical glass as well as preparation method and optical element thereof

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preparation example Construction

[0060] The present invention also provides a method for preparing the optical glass according to the present invention, which includes: weighing each component according to the proportion, mixing them uniformly, melting them, and then pouring or slipping them into a molding mold, or directly pressing them into shape.

[0061] Specifically, they are weighed according to the specified ratio, mixed into batch materials, and melted in a crucible made of platinum at a temperature of 1230-1280 ° C. After the raw materials are melted into glass liquid, the temperature is raised to 1280-1330 ° C. ℃ and turn on the stirrer made of platinum to stir and homogenize, and the stirring time is controlled at 5-10h. After the stirring is completed, raise the temperature to 1320-1370°C and keep it warm for 5-10 hours to clarify and make the bubbles fully float up, then lower the temperature to 1180-1230°C and pour or leak into the molding mold or press molding, and finally anneal After processi...

Embodiment 1～10

[0066] The raw materials corresponding to the components in Table 1 and Table 2 below are weighed and mixed according to the specified ratio to form batch materials, and then melted in a crucible made of platinum at a temperature of 1250°C. After the raw materials are melted into molten glass , raise the temperature to 1310°C and turn on the stirrer made of platinum to stir and homogenize, and the stirring time is controlled at 8h. After the stirring is completed, raise the temperature to 1350°C and keep it warm for 8 hours to clarify, so that the bubbles fully float up, then lower the temperature to 1210°C and pour or leak into the molding mold or press molding, and finally process after annealing to obtain Example 1 ~10 optical glass.

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Abstract

The invention relates to a dense lanthanum flint optical glass as well as a preparation method and an optical element thereof. The dense lanthanum flint optical glass is prepared from the following components in percentage by weight: 5.5 to 8% of SiO2 (silicon dioxide), 22 to 27% of B2O3 (boric oxide), 42 to 49% of La2O3 (lanthanum oxide), 0.1 to 2.9% of ZnO (zinc oxide), 7 to 9% of ZrO2 (zirconium dioxide), 3.1 to 6% of Nb2O3 (niobium oxide), 6 to 8% of Y2O3 (yttrium oxide), 1 to 8% of Gd2O3 (gadolinium oxide), and 0.01 to 0.1% of Sb2O3 (antimonous oxide). The dense lanthanum flint optical glass has the advantages that the reflectivity nd is between 1.801 and 1.821, and the abbe number upsilond is between 46 and 49; the chemical stability and coloring degree are good; the specific weight is lower, and the weights of a glass element and an optical system are reduced; the crystallizing temperature is lower, and the batched production is easily realized.

Description

technical field [0001] The invention relates to a heavy lanthanum flint optical glass, a preparation method thereof and an optical element, belonging 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, there is an increasing demand for heavy lanthanum flint optical glass with advantages such as high refraction, medium dispersion, and small specific gravity. In order to make the glass have the above properties, the La in the glass 2 o 3 、Gd 2 o 3 , Nb 2 o 5 、TiO 2 、 Ta 2 o 5 , ZnO, ZrO 2 The content of components is also gradually increasing, but too much of these components will lead to low viscosity of the glass, difficulty in molding, difficulty in obtaining high-quality stripes, and serious crystallization and other defects. At the same time, in today's increasingly fierce market competition, the addition of certain ingredients will undoubtedly i...

Claims

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Application Information

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IPC IPC(8): C03C3/068C03C4/00C03B11/00C03B19/02G02B1/00
CPCG02B1/00C03B11/00C03B19/02C03C3/068C03C4/00
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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