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Optical glass, optical prefabricated member and optical element

A technology for optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of low production yield, white turbidity and fogging on the glass surface, and achieve the effect of improving molding performance and improving yield.

Active Publication Date: 2016-11-09
CDGM OPTICAL GLASS
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  • Abstract
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Problems solved by technology

[0003] In the prior art, fluorophosphate optical glass with a refractive index of 1.46-1.53 ​​and an Abbe number in the range of 77-84 is prone to breakage or cracks during the precision molding process, and often accompanied by white turbidity and Fogging, unable to make effective optical components, low production yield

Method used

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  • Optical glass, optical prefabricated member and optical element
  • Optical glass, optical prefabricated member and optical element
  • Optical glass, optical prefabricated member and optical element

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Embodiment Construction

[0020] The present invention is not limited to the following aspects, and can be implemented with appropriate changes within the scope of the purpose of the present invention. It should be noted that, for overlapping descriptions, sometimes omitted descriptions are used.

[0021] Ⅰ. Optical glass

[0022] Each component constituting the optical glass of the present invention will be described below. In the description of the present invention, each component and its content, unless otherwise specified, each component represents the sum of the elements including all possible ion valence states, and its content is represented by the weight percentage of the component in all components express. In addition, in the following description, when referring to a predetermined value or less or a predetermined value or more, the predetermined value is also included.

[0023] P is an important cationic component as a glass network former, and when its content is less than 10%, the stab...

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Abstract

The invention provides optical glass with excellent precision molding performance, refractive index being 1.46-1.53 and abbe number being 77-84. The optical glass comprises, by weight percentage, 2-15% of P, 1-13% of Al, 10-22% of Ba, 15-30% of Sr, 0.1-8% of Ca, 0-5% of Mg, larger than 0 but not larger than 10% of Gd, 20-35% of F and 5-16% of O. The optical glass has the advantages that the molding performance of the optical glass is improved fundamentally by reasonably regulating the proportion of the components, the problems of damage and fogging of the optical glass with the refractive index being 1.46-1.53 and the abbe number being 77-84 during the molding of the optical glass are solved effectively, and the yield of optical element production is increased greatly.

Description

technical field [0001] The invention relates to a low-refraction and low-dispersion optical glass, in particular to a low-refraction and low-dispersion fluorophosphate optical glass, an optical prefabricated part and an optical element. Background technique [0002] In recent years, with the rapid popularization of digital cameras, video cameras and camera phones, optical materials have also developed rapidly in the direction of high precision and miniaturization. In order to meet the above requirements, the use of aspheric lenses for optical design has become the mainstream; At the same time, more and more attention has been paid to the precision molding technology with low cost and high yield in the manufacture of optical components. As a new type of glass material widely used, fluorophosphate optical glass has the characteristics of low dispersion and low refractive index. In the optical system, it can eliminate the special dispersion of the secondary spectrum, improve th...

Claims

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Application Information

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IPC IPC(8): C03C4/00C03C3/247G02B1/00
CPCC03C3/247C03C4/00G02B1/002
Inventor 匡波
Owner CDGM OPTICAL GLASS
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