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Lanthanum crown optical glass, preparation method thereof and optical element

A technology for optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems that are not conducive to the stable production and control of optical glass, high-definition vehicle lenses, glass coloring, etc., and achieve chemical stability and mechanical stability. Excellent performance, simple and easy preparation method, and easy raw materials

Active Publication Date: 2021-08-10
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

F is volatile, and its introduction is easy to cause optical fluctuations and surface volatile streaks, which is not conducive to the stable production and control of optical glass
[0012] The disclosed optical glass of patent application CN109071314A, CN107417095A etc. contains Ti 4+ , W 3+ Such as coloring ions, it is easy to color the glass, which is not conducive to the high-definition of the vehicle lens

Method used

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  • Lanthanum crown optical glass, preparation method thereof and optical element
  • Lanthanum crown optical glass, preparation method thereof and optical element
  • Lanthanum crown optical glass, preparation method thereof and optical element

Examples

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preparation example Construction

[0088] The present application also provides a method for preparing lanthanum crown optical glass with a negative refractive index temperature coefficient according to the present application, including: weighing each component according to the proportion, mixing them uniformly, and then melting them, and then casting or pouring them into a molding mold , or direct compression molding.

[0089] Specifically, each component is weighed and mixed uniformly according to the specified ratio to make a batch, and the prepared batch is put into a smelting device made of quartz, corundum or precious metal (Au, Pt, etc.), It is melted, stirred, and clarified at a temperature of 1200-1450°C, and poured or leaked into a molding mold for molding, or directly pressed for molding, and finally annealed and cooled to obtain the optical glass or optical element of the present application.

[0090] The present invention also provides an optical element comprising the lanthanum crown optical glas...

Embodiment 1-40

[0094] The components of Examples 1-40 in Tables 1-7 are weighed in proportion and mixed uniformly to make a batch, and the prepared batch is put into a crucible made of precious metal Pt, at a temperature of 1200-1450°C After 20 hours of melting, stirring, and clarification, the temperature was lowered to 1200°C for 1 hour, and then released from the furnace, leaked into the mold for molding, and the optical glass of the present application could be obtained after the glass was annealed and cooled.

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Abstract

The invention provides lanthanum crown optical glass, a preparation method thereof and an optical element. The lanthanum crown optical glass comprises the following components in percentage by cation mole: 15-52% of Si < 4 + >; 0-24.99% of B < 3 + >; 0-20% of La < 3 + >; 0-5% of Ca < 2 + >; 0-5% of Zn < 2 + >; 0-3% of Zr < 4 + >; 0-3% of Al < 3 + >; 0-3% of Nb < 5 + >; 5-40% of Ba < 2 + >; 0-30% of Sr < 2 + >; 0-0.07% of Sb < 3 + >; the refractive index of the lanthanum crown optical glass is 1.65-1.72; and the abbe number of the material is 50.1-55.0. The lanthanum crown optical glass is low in refractive index temperature coefficient, low in softening temperature, high in hardness, low in abrasion degree, low in density and coloring degree, and excellent in devitrification resistance, chemical stability and mechanical property.

Description

technical field [0001] The invention relates to a lanthanum crown optical glass, a preparation method thereof, and an optical element, in particular to a lanthanum crown optical glass with a negative refractive index temperature coefficient, a preparation method thereof, and an optical element, and belongs to the technical field of optical glass. Background technique [0002] In recent years, the demand for negative temperature coefficient of refraction index optical glass in the automotive market has been increasing, especially for automotive lenses that are suitable for use in harsher environments and have a negative temperature coefficient of refraction index. [0003] Optical glass with a refractive index of 1.65-1.73 and an Abbe number of 47-55 belongs to medium refractive index glass, and is currently mainly used in cameras, microscopes and other products. In recent years, with the development of autonomous driving, vehicle-mounted lens equipment has developed vigorous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068C03C3/095G02B1/00
CPCC03C3/068C03C3/095G02B1/00
Inventor 李建新陈超胡向平陈哲王尧宏
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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