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High-refractive-index and low-dispersion optical glass and preparation method thereof

A technology of optical glass and high refractive index, applied in the field of optical glass, can solve the problems of high price, high cost and high content, achieve the effect of reasonable distribution and lower production cost

Inactive Publication Date: 2014-04-30
SICHUAN RUITIAN OPTICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are many deficiencies or defects in the high refractive index and low dispersion optical glasses disclosed in the prior art, Ta 2 o 5 The content is 5wt%-12.9wt%, the reason why this kind of high refractive index low dispersion glass contains a large amount of Ta 2 o 5 , because for optical glass with high refractive index and low dispersion whose refractive index nd is greater than or equal to 1.75, it is necessary to maintain a relatively high refractive index, but Ta 2 o 5 Is an expensive rare earth element, so the above optical glass because Ta 2 o 5 The content is higher, its cost is higher, and at the same time Gd 2 o 3 As an important component to increase the refractive index, it also leads to an increase in the cost of high refractive index and low dispersion optical glass with a refractive index nd of 1.86-1.89 and an Abbe number νd of 38.5-42

Method used

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  • High-refractive-index and low-dispersion optical glass and preparation method thereof
  • High-refractive-index and low-dispersion optical glass and preparation method thereof
  • High-refractive-index and low-dispersion optical glass and preparation method thereof

Examples

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Effect test

Embodiment 1

[0082] 1.1 An optical glass with high refractive index and low dispersion, whose refractive index is 1.87≤nd≤1.89, Abbe number is 38.5≤νd≤42, and glass coloring degree is λ70≤390nm. The optical glass is listed in Table 1 below The raw material composition that shows weight percent produces 1000kg high refractive index of the present invention, the concrete consumption of each raw material of low dispersion optical glass is also as shown in table 1 respectively:

[0083] Table 1 Example 1

[0084]

[0085] 1.2 Preparation method:

[0086] After weighing all the raw materials according to the proportion, mix them thoroughly and evenly, then put them into a platinum crucible, melt and clarify at 1400°C, cool down to 1320°C after homogenization, pour them into preheated molds, and heat them at 500°C The glass is annealed at ℃ to obtain finished optical glass.

Embodiment 2

[0088] 2.1 An optical glass with high refractive index and low dispersion, whose refractive index is 1.87≤nd≤1.89, Abbe number is 38.5≤νd≤42, and glass coloring degree is λ70≤390nm. The optical glass is listed in Table 2 below Show the raw material composition of weight percentage, produce 1000kg high refractive index of the present invention, the concrete consumption of each raw material of low dispersion optical glass is also shown in following table 2 respectively:

[0089] Table 2 Example 2

[0090]

[0091]

[0092] 2.2 Preparation method:

[0093] After weighing all the raw materials according to the proportion, mix them thoroughly and evenly, then add them into a platinum crucible, melt and clarify them at 1450°C, cool down to 1300°C after being homogenized, pour them into preheated molds, and heat them at 60°C The glass is annealed at ℃ to obtain finished optical glass.

Embodiment 3

[0095] An optical glass with a high refractive index and low dispersion, the refractive index is 1.87≤nd≤1.89, the Abbe number is 38.5≤νd≤42, and the glass coloring degree is λ70≤390nm. The optical glass is shown in Table 3 below Composition of raw materials in weight percent, production of 1000kg high refractive index of the present invention, the specific consumption of each raw material of low dispersion optical glass is also shown in table 3 below:

[0096] Table 3 Example 3

[0097]

[0098]

[0099] 3.2 Preparation method:

[0100] After weighing all the raw materials according to the proportion, mix them well, then put them into a platinum crucible, melt and clarify them at 1420°C, cool down to 1350°C after homogenization, pour them into preheated molds, and heat them at 700°C The glass is annealed at ℃ to obtain finished optical glass.

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Abstract

The invention provides high-refractive-index and low-dispersion optical glass. The optical glass consists of the following raw materials in percentage by weight: 5-32 percent of SiO2 and B2O3, 45-65 percent of La2O3, Gd2O3 and Y2O3, 0.5-10 percent of ZnO, 1-20 percent of TiO2 and Nb2O5, 0-15 percent of ZrO2, 0-2 percent of WO3, 0-10 percent of Li2O, Na2O and K2O, 0-10 percent of MgO, CaO, SrO and BaO, 0-12 percent of Ta2O5 and 0-1 percent of Sb2O3. Compared with the prior art, the high-refractive-index and low-dispersion optical glass has the beneficial effects of higher internal color penetration degree, small specific weight, low smelting process temperature, smaller adding amounts of Ta2O5 and Gd2O3 and lowered cost.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with high refractive index and low dispersion and a preparation method thereof. Background technique [0002] Optical glass is a glass material used to manufacture lenses, prisms, mirrors and windows in optical instruments or mechanical systems. Optical glass has good light transmission performance. It has a high refractive index and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, telescopes, microscopes and lenses. With the advancement of technology and the upgrading of digital products, the demand for optical glass is also increasing, and higher requirements are placed on the performance of optical glass. [0003] Optical glasses with high refractive index and low dispersion are widely used in current imaging devices, for example: lenses formed of high refractive index and low dispersion glass in pairs can correct chromatic aberr...

Claims

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Application Information

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IPC IPC(8): C03C3/095
Inventor 徐鹏鸟
Owner SICHUAN RUITIAN OPTICAL
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