Optical glass

An optical glass and necessary technology, applied in the field of optical glass, can solve the problems of damage to the glass network structure, erosion of melting equipment, deterioration of glass crystallization performance, etc., and achieve the effect of good crystallization performance and low glass price

Active Publication Date: 2012-09-19
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] patent CN100352781C belongs to the same type of glass as the present invention, but it contains Li2O as an essential component, Li2O will corrode the smelting device and

Method used

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Examples

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Embodiment

[0037] Examples 1 to 16 in Table 1 and Table 2 are typical experiments for obtaining lanthanide optical glasses with a refractive index (nd) between 1.90 and 1.92 and an Abbe number (vd) between 33 and 36 according to the present invention .

[0038] Calculate, weigh, and mix these raw materials according to the ratios provided in Tables 1-2 below, and put the prepared batch into the smelting device (in view of the application requirements of the present invention, the smelting device needs to use a platinum crucible), and then After smelting at 1420°C with appropriate stirring, clarification, and cooling processes, it is poured or leaked into the forming mold. Finally, after post-processing such as annealing and processing, or pressing and forming by secondary pressing technology, the environmentally friendly lanthanide optical glass or optical type can be obtained.

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Abstract

The invention provides high refractive index and low dispersion lanthanide-series optical glass which is suitable for production and secondary compression. The high refractive index and low dispersion lanthanide-series optical glass comprises SiO2, B2O3, La2O3, ZrO2, Nb2O5, ZnO, Y2O3 and TiO2 which are taken as necessary components, and 0-1wt% of Sb2O3 taken as optional component; the optical glass does not contain Th, Cd or As; the content of SiO2 is more than that of B2O3; the refractive index (nd) is between 1.90 and 1.92; and the Abbe number (vd) is between 33 and 36.

Description

technical field [0001] The invention relates to an optical glass, in particular to a lanthanide optical glass with a refractive index (nd) between 1.90-1.92 and an Abbe number (vd) between 33-36. 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 lanthanide optical glass with advantages such as high refraction and low dispersion is increasing. When a lens made of glass with high refractive index and low dispersion is combined with a lens made of glass with high refractive index and high dispersion, the size of the optical system can be reduced, and chromatic aberration can be reduced at the same time. The optical elements of the system or projection optical system such as a projector occupy an important place. [0003] The glass disclosed in the patent CN101337768A belongs to the same kind of glass as the present invention, but its components contain more than 6% Gd 2 o ...

Claims

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Application Information

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IPC IPC(8): C03C4/00C03C3/068
Inventor 赵仲勋
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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