Composite polishing solution for blue glass optical filter, and preparation method thereof

Abstract

The invention discloses a composite polishing solution for a blue glass optical filter, and a preparation method thereof. The composite polishing solution comprises aluminum hydroxide, zirconium hydroxide, silica sol, caustic soda liquid, a surfactant, a defoaming agent and water. The preparation method comprises the following steps: carrying out high-energy ball milling, drying granulation, calcination, high-energy ball milling and high-energy dispersion on aluminum hydroxide, zirconium hydroxide and silica sol to form a well dispersed material, and adding the caustic soda liquid, the surfactant, the antifoaming agent and water to prepare the stable composite polishing solution system. According to the composite polishing solution disclosed by the invention, the cutting rate of rough polishing and the surface quality of fine polishing are realized while one-step polishing is carried out, the process is simple, the cost is saved, the sewage discharge of a cleaning agent can be reduced,and the composite polishing solution has very good environmental benefits.

Description

technical field [0001] The invention relates to a glass polishing fluid, in particular to a composite polishing fluid for blue glass filters and a preparation method thereof. Background technique [0002] Blue glass infrared cut filter is widely used in digital imaging fields such as high-resolution mobile phone camera modules and surveillance lenses to block the influence of infrared light on CCS / CMOS imaging and eliminate ghosts and spots. Compared with the ordinary white glass infrared cut filter, the blue glass filter has a clearer image, and the effective angle of photosensitivity can reach 30°. [0003] Blue glass is made of blue glass material (ordinary optical filters are ordinary optical glass), and its function is to filter infrared light by "absorption". Due to the higher transmittance of blue wavelengths, it has better penetration than red-orange glass filters, which can filter infrared light above 630nm (but allow the rest of the light from ultraviolet to infra...

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Problems solved by technology

Generally, a flat double-sided polishing machine is used for polishing. Since the Mohs hardness of rare earth oxides is usually between 4-6, and the hardness of blue glass is between 5-7, the processing is time-consuming and material-intensive, and because it is a two-step method, It needs to be fully cleaned in the middle, resulting in a very low pass rate of blue glass processing, and the investment in the machine is also expensive.

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