Optical glass, glass preforms, optical elements and optical instruments having the same
A technology of optical glass and weight, which is applied in the field of glass preforms, optical components and optical instruments with it, and optical glass, and can solve the problems of difficulty in mass production and high cost of devitrification
Active Publication Date: 2022-07-05
CDGM OPTICAL GLASS
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Problems solved by technology
For this reason, an object of the present invention is to propose an optical glass, a glass preform, an optical element and an optical instrument having the same. High-refraction and low-dispersion optical glass is easy to devitrify in the existing technology, which is difficult and expensive in mass production
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[0022] The embodiments of the present invention are described in detail below, and the embodiments described below are exemplary and intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.
[0023] In one aspect of the present invention, the present invention provides an optical glass. According to an embodiment of the present invention, the optical glass includes: 5-25% by weight of B 2 O 3 , 25 to 45 wt% La 2 O 3 , 0 to 10% by weight of Y 2 O 3 , 10 to 35% by weight of Gd 2 O 3 , 0.5 to 15% by weight of SiO 2 , 1 to 15% by weight of ZrO 2 , 0-5 wt% TiO 2 , 0~7wt% WO 3 , 0~15wt% Ta 2 O 5 , 0-10 wt% ZnO and 0-8.5 wt% Nb 2 O 5 , where m (TiO2+WO3+La2O3) / m (B2O3+Nb2O5+SiO2+ZrO2+Gd2O3) not greater than 0.95.
[0024] Glass composition:
[0025] B 2 O 3 It is a skeleton component of glass, and in the present invention, it has the functions of improving glass meltability, devitrification resist...
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Abstract
The invention discloses an optical glass, a glass preform, an optical element and an optical instrument having the same. Wherein, the optical glass includes: 5-25% by weight of B 2 O 3 , 25 to 45 wt% La 2 O 3 , 0 to 10% by weight of Y 2 O 3 , 10 to 35% by weight of Gd 2 O 3 , 0.5 to 15% by weight of SiO 2 , 1 to 15% by weight of ZrO 2 , 0-5 wt% TiO 2 , 0-7 wt% WO 3 , 0~15wt% Ta 2 O 5 , 0-10 wt% ZnO and 0-8.5 wt% Nb 2 O 5 , where m (TiO2+WO3+La2O3) / m (B2O3+Nb2O5+SiO2+ZrO2+Gd2O3) not greater than 0.95. The refractive index nd of the optical glass is greater than 1.86, and the Abbe number vd is greater than 38.8 optical glass, thereby solving the technical problems that the high-refractive and low-dispersion optical glass is easy to devitrify in mass production, difficult to mass-produce, and high cost in the prior art.
Description
technical field [0001] The present invention belongs to the technical field of optical glass, and in particular, the present invention relates to optical glass, glass preforms, optical elements and optical instruments having the same. Background technique [0002] High-refractive and low-dispersion optical glass can simplify the optical system, eliminate spherical aberration, chromatic aberration and image quality distortion, and expand the field of view of the lens. Meet the high-quality requirements of new optoelectronic products for imaging quality, especially the high-refractive-index and low-dispersion optical glass with refractive index nd greater than 1.86 and Abbe number vd greater than 38.8, the market demand is large. [0003] Usually, more rare earth oxides need to be introduced into the formulation system of high-refractive and low-dispersion glass to increase the refractive index of the glass, but in different formulation systems, the more lanthanide oxides are ...
Claims
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IPC IPC(8): C03C3/068G02B1/00
CPCC03C3/068G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS