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An optical glass and borate technology, applied in the field of borate lanthanide optical glass, can solve problems such as the deterioration of glass crystallization performance, and achieve the effect of reducing production costs
Active Publication Date: 2013-01-02
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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[0009] The glass disclosed in patent CN 101367611A belongs to the same kind of glass as the present invention, but it contains 0-12% ZnO, which is significantly different from the range of 20-30% in the present invention. In addition, the patent also contains 2-15% ZnO Y 2 o 3 , and Y 2 o 3 The presence of will make the crystallization performance of the glass worse
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[0036] Examples 1 to 5 listed in the following table 1 are used to illustrate the borate lanthanide optics obtained with a refractive index (nd) between 1.82 and 1.84 and an Abbe number (υd) between 35 and 39 according to the present invention. Specific embodiments of glass. Comparative Examples A and B are comparative embodiments with a refractive index between 1.82-1.84 and an Abbe number between 35-39.
[0037] Calculate, weigh, and mix these raw materials according to the ratio provided in Table 1, 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 take After smelting with proper mixing, clarification and cooling process, it is poured or leaked into the forming mold. Finally, after post-processing such as annealing and processing, or directly pressing and forming through precision pressing technology, the borate lanthanide optical glass or op...
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Abstract
The invention relates to a borate lanthanide optical glass, belongs to the technical field of borate lanthanide optical glass, and provides a borate lanthanide optical glass which adopts B2O3, La2O3, Nb2O5 and ZnO as main components, does not contain harmful substances comprising Pb, Th, Cd, Hg, As, Cr or F, and does not contain a near-infrared absorption component Yb2O3 or an expensive raw material Ta2O5. The refractive index (nd) and the Abbe number (nud) of the optical glass are 1.82-18.4 and 35-39 respectively. Results of tests carried out according to a GB / T17129 method show that the grade of water durability (DW) of the optical glass is 1, and the grade of the acid durability (DA) of the optical glass is 3 or more. The optical glass comprises 3-6wt% of SiO2, 15-25wt% of B2O3, 20-40wt% of La2O3, 2-5wt% of ZrO2, 5-10wt% of Nb2O5, 20-30wt% of ZnO, 3-8wt% of WO3, 1-4wt% of TiO2, 0-5wt% of Gd2O3 and 0-1wt% of Sb2O3. The optical glass provided in the invention has the advantages of low costs of the above raw materials, good chemical stability, and low crystallization tendency, so batch production of the optical glass can be easily realized.
Description
technical field [0001] The present invention relates to a kind of B 2 o 3 , La 2 o 3 , Nb 2 o 5 , ZnO as the main component, does not contain harmful substances such as lead, thorium, cadmium, arsenic, mercury, chromium, fluorine and expensive Ta 2 o 5 The optical glass specifically relates to a borate lanthanide optical glass with a refractive index (nd) between 1.82-1.84 and an Abbe number (υd) between 35-39. Background technique [0002] With the fierce competition and development of the optoelectronic product market, manufacturing optical materials with high yield and low cost is the goal of every optical material manufacturer. On the other hand, in recent years, digital cameras, digital video cameras, camera phones, etc. have become increasingly popular, and the degree of integration and functions of mechanical devices used in optical systems have increased rapidly. In this case, the optical system is required to achieve higher accuracy and reduce the weight and...
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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 胡向平张卫梁立新
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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