Basic glass for gradient refractive index lens and gradient refractive index lens

Abstract

The invention discloses base glass for a gradient index lens and a gradient index lens. The base glass for the gradient index lens is prepared from the following components in parts by mass: 50-64 parts of SiO2, 1-15 parts of B2O3, 0-6 parts of Al2O3, 0-5 parts of MgO, 0-8 parts of ZnO, 0-6 parts of CaO, 0-3 parts of BaO, 8-13 parts of Tl2O, 0-8 parts of Na2O, 0-2 parts of K2O, 0-1 part of ZrO2 and 0.5-1 part of In2O3, wherein the preconditions are: 60-65 parts of SiO2 and B2O3, 10-14 parts of Al2O3, MgO and ZnO, and 21-24 parts of CaO, BaO, Tl2O, Na2O, K2O, ZrO2 and In2O3. According to the base glass for the gradient index lens, a large aperture is easy to achieve, and the base glass for the gradient index lens is high in transmittance, fast in ion exchange speed, high in thermal stability and chemical stability and low in volatilization during high-temperature refining.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a base glass for a gradient index lens and a gradient index lens. Background technique [0002] Gradient index lens utilizes the characteristic that the internal refractive index of the gradient index material changes according to a certain rule, and performs length interception and end face grinding according to different use requirements, so as to realize the transfer and imaging of the target image from end face to end face, such as for endoscopy Mirrors, imaging self-focusing lens arrays for fax machine scanners; and complete the transmission and coupling of light, such as collimators, optical couplers, attenuators, etc. used in optical communication. The ion exchange method is commonly used to make gradient index lenses. This method places the basic glass material in a high temperature molten salt, so that the monovalent cations (such as Ag + , Li + , Cs + etc.) and Na in m...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the object of the present invention is to provide a base glass for gradient index lenses and a gradient index lens, aiming at solving the problem of low transmittance and long ion exchange time of the existing base glass for gradient index lenses. Problems of too long, poor thermal and chemical stability

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