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Dense flint optical glass and preparation method thereof

A technology of optical glass and heavy flint, which is applied in the field of heavy flint optical glass and its preparation, can solve the problems of unfavorable promotion and achieve good transmission performance

Inactive Publication Date: 2016-02-24
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

[0011] The competition in the optical glass market is becoming increasingly fierce, and optical glass with excellent performance and low price is more attractive, but the above-mentioned optical glasses have certain shortcomings in terms of cost or performance, which is not conducive to the promotion of products in the market

Method used

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  • Dense flint optical glass and preparation method thereof
  • Dense flint optical glass and preparation method thereof
  • Dense flint optical glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Table 1: Glass components and performance parameters of Examples 1-10

[0074]

[0075] Table 2: Glass components and performance parameters of Examples 11-20

[0076]

[0077] Table 3: Glass composition and performance parameters of Comparative Examples A-E

[0078]

[0079] Table 4: Optical difference table of Example 5

[0080]

1st pot

2nd pot

3rd pot

Pot 4

5th pot

nd

1.95590

1.95595

1.95574

1.95585

1.95599

υ d

17.85

17.88

17.84

17.86

17.87

[0081] Remarks: n in Table 1-4 d , Υ d All are the values ​​after annealing at -25°C.

[0082] The raw materials corresponding to the components of the 20 examples listed in Table 1 and Table 2, such as oxides, carbonates, nitrates, fluorides, metaphosphates, etc., are weighed according to the specified ratios, and the temperature is at 1250°C. It is added to the platinum crucible at temperature, after melting, ventilating (1270°C nitrogen gas for 5 hours), stirring, clarification, and homogenization process, after cooling to...

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Abstract

The invention discloses a dense flint optical glass and a preparation method thereof. The dense flint optical glass contains the following ingredients, calculated by the weight of compounds: 1.01-3% of SiO2, 0-3% of B2O3, 6.01-12.1% of K2O, 0-4% of Na2O, 13-20% of TiO2, 43-52% of Nb2O5 and 19-24.9% of P2O5; the total amount of SiO2 and B2O3 is 1.01-4.2%; the total amount of Na2O and K2O is 6.01-12.1%; and the optical glass does not contain the components of Li2O, Bi2O3, WO3, La2O3, Sb2O3, Gd2O3, Y2O3 or Ta2O5. The optical glass of the invention has good permeation performance, chemical stability and moisture stability, and transition temperature Tg of no more than 685 DEG C, and is suitable for compression molding and mass production.

Description

Technical field [0001] The invention relates to a heavy flint optical glass and a preparation method thereof, and belongs to the technical field of optical glass. Background technique [0002] With the development of society, lenses with a refractive index in the range of 1.93 to 1.99 and an Abbe number in the range of 15.5 to 19.0 have become more widely used in cameras, video cameras, and mobile phones. With the increase of camera pixels, the requirements for high precision and light weight of optical glass lenses have become stronger. Traditional optical glasses that contain harmful substances, high density, poor transmission performance and poor chemical stability are gradually being eliminated. [0003] The optical glass disclosed in the patent application CN101941797A has a wavelength of less than 470nm when the transmittance reaches 70%, and its fringe level is B-C level, which can no longer meet the requirements of modern high-end equipment. [0004] Patent application JP201...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/062C03C3/064C03C4/20
CPCC03C3/062C03C3/064C03C4/20
Inventor 李建新陈超赵仲勋胡向平梁立新
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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