Fluorophosphate optical glass, optical prefabricated component, optical element and optical apparatus
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A fluorophosphate, optical glass technology, used in optical components, optics, instruments, etc., can solve the problems of chemical stability, poor anti-devitrification, high thermal expansion coefficient, and low bubble degree, and achieve excellent anti-devitrification. crystal properties, improving the level of bubbles, and reducing the thermal expansion coefficient
Inactive Publication Date: 2019-01-08
CDGM OPTICAL GLASS
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Specific applications in these fields have put forward higher requirements on the performance of fluorophosphate optical glass. In the existing published literature, there have been reports on fluorophosphate optical glass with an Abbe number of 80 or greater, but these fluorophosphate optical glasses Salt optical glass has high density, poor chemical stability and devitrification resistance, high coefficient of thermal expansion, low bubble degree, and easy to cause damage during molding and heating
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[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0023] The functions and limited ranges of the components contained in the fluorophosphate optical glass of the present invention will be explained in detail below in combination with specific principles.
[0024] It should be noted that, in this specification, each cationic component and the total content of cationic components are expressed as “cation mole percent”, and each anion component and the total content of anion components are expressed as “anion mole percent”. "Cation molar percentage" refers to the percentage of a certain cationic component in the molar content of all cationic species, and "anion molar percenta...
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Abstract
The invention provides fluorophosphate optical glass, an optical prefabricated component, an optical element and an optical apparatus, and belongs to the technical field of optical glass. The opticalglass contains the following components in percentage by mol based on cations: 2-20% of P<5+>, 20-40% of Al<3+>, 0.5-10% of Ba<2+>, 5-25% of Sr<2+>, 15-35% of Ca<2+> and 1-15% of Mg<2+>, wherein Ba<2+> / Ca<2+> is 0.01-0.155; anions contain the following components in percentage by mol based on anions: F<-> and O<2->, wherein O<2-> / F<-> is 0.105-0.2. According to the fluorophosphate optical glass, the optical prefabricated component, the optical element and the optical apparatus disclosed by the invention, the Ba<2+> / Ca<2+> content proportion is adjusted, so that the density of the optical glassis reduced, and the bubble degree grade and the crystallization resistance performance of the optical glass are improved; the O<2-> / F<-> content proportion is adjusted, so that the thermal expansioncoefficient of the optical glass is reduced, the optical glass is unlikely to be damaged in the die pressing course and the hot processing course, and the glass formation stability is improved. The refractive index (nd) of the fluorophosphate optical glass is 1.42-1.45, the Abbe number (vd) is 93-96, the density (rho) is 3.55 g / cm<3> or below, the bubble degree is B level or above, the thermal expansion coefficient is 160*10<-7> / K or below, the water resistant effect stability (Dw) is 2 type or above, and the crystallization resistance performance is excellent.
Description
technical field [0001] The invention belongs to the technical field of optical glass, in particular to a fluorophosphate optical glass, an optical prefabricated part, a component and an instrument. Background technique [0002] Fluorophosphate optical glass is a new type of glass material with low refractive index and low dispersion. In the optical system, it can eliminate the special dispersion of the secondary spectrum, improve the resolution, improve the imaging quality of the optical system, and has low softening characteristics. , can be directly precision molded into an aspheric lens, which can better eliminate chromatic aberration, spherical aberration, aberration, and reduce system volume and weight. [0003] At present, fluorophosphate optical glass has been widely used in high-precision and high-resolution optical instrument combination lenses such as digital cameras, high-definition monitors, and astronomical telescopes, and has become a new type of optoelectronic...
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