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Optical glass and preparation method thereof

A kind of optical glass and material technology, which is applied in the field of phosphate optical glass and its preparation, can solve problems such as complex production processes, and achieve the effects of good process performance and stability, and high visible light transmittance

Active Publication Date: 2013-05-08
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore using P 2 o 5 As a raw material, complex production processes are required to ensure

Method used

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  • Optical glass and preparation method thereof
  • Optical glass and preparation method thereof
  • Optical glass and preparation method thereof

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Embodiment

[0043] The glass components of the implementation composition examples (Examples 1-5) of the phosphate optical glass with high refractive index and low Abbe number of the present invention and the composition examples (comparative examples a and b) of the aforementioned phosphate optical glass The percentage content and the refractive index of the glass made (n d ), Abbe number (υ d ), transition temperature (Tg), linear expansion coefficient (α20~120) from 20 to 120°C, specific gravity (d), liquidus temperature (L T ), coloring degree (λ 70 / λ 5 ), water resistance (D w ) and the number of Pt-containing foreign substances in the glass are shown in Table 1 and Table 2.

[0044] Weigh KPO according to the given ratio 3 , Al(PO 3 ) 3 、Ba(PO 3 ) 2 、TiO 2 , Nb 2 o 5 、WO 3 、KHF 2 、 Ta 2 o 5 , ZrO 2 , La 2 o 3 , ZnO raw materials are mixed evenly, then added to the platinum crucible, the difficulty of melting varies with the components, generally at a temperature ...

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Abstract

The present invention relates to optical glass and a preparation method thereof. The optical glass comprises, by molar weight, 30-50% of KPO3, 1-10% of Al(PO3)3, 0-5% of Ba(PO3)2, 20-35% of TiO2, 20-40% of Nb2O5, 1-5% of WO3, 0-1% of KHF2, 0-2% of Ta2O5, 0-2% of ZrO2, 0-5% of La2O3 and 0-3% of ZnO, wherein the total amount of the Ta2O5, the ZrO2, the La2O3 and the ZnO is 0-3%. According to the present invention, the refractive index (nd) of the phosphate optical glass provided by the present invention is 1.93-1.96; the abbe number (upsilond) is in a range of 17.5-19.0; the wavelength lambda 70 is not more than 470 nm, wherein the external transmittance of the wavelength lambda 70 to the optical glass having a thickness of 10 nm is 70%; the optical glass provided by the present invention is mainly applicable for the sensing and projection lens in the digital camera, the video camera and the liquid crystal projector.

Description

technical field [0001] The invention relates to an optical glass and a preparation method thereof, in particular to a refractive index (n d ) between 1.93 and 1.96, the Abbe number (υ d ) between 17.5-19.0 phosphate optical glass and its preparation method. Background technique [0002] In recent years, in optical system design, people usually use high refractive index glass to promote the miniaturization, ultra-thin development and wide-angle realization of digital cameras, video cameras, and mobile phone cameras. When designing a special optical system, it is more desirable to minimize chromatic aberration. And this kind of glass with high refraction and low Abbe number can make up and correct the chromatic aberration, so that the chromatic aberration can be reduced to a lower range. [0003] Early production of high refractive index, high dispersion glass (such as H-ZF847 / 238) is based on SiO 2 As a glass former, a larger amount of TiO is introduced 2 , Nb 2 o 5 As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/21C03C3/247
Inventor 戎俊华张卫王拓唐雪琼胡向平
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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