A kind of multi-layer polishing glue and its preparation method and application

Abstract

The invention relates to a multilayer polishing glue and a preparation method and an application thereof. The multilayer polishing glue at least comprises a surface-layer polishing glue, a middle-layer polishing glue and an inner-layer polishing glue which are sequentially arranged, wherein the surface-layer polishing glue, the middle-layer polishing glue and the inner-layer polishing glue all comprise asphalt and polishing powder; and , from the surface-layer polishing glue to the inner-layer polishing glue, the penetration of the asphalt is kept unchanged or gradually increased, and the grain diameters of the polishing powder are sequentially reduced. According to the multilayer polishing glue, the technical difficulty that the surface roughness, surface defects and the surface precisionof soft and brittle infrared material, especially chalcogenide glass are difficult to converge at the same time in the precise polishing process is overcome, and accurate control of various machiningquality parameters in the batch precision polishing process is realized.

Description

technical field [0001] The invention belongs to the technical field of optical element manufacturing, and in particular relates to a multi-layer polishing glue for optical element processing, a preparation method and application thereof. Background technique [0002] With the continuous advancement of key technologies such as material preparation, precision machining and coating, and optical system calibration, soft and brittle infrared optical components, especially high-precision polished chalcogenide glass optical components, have become the core components of a new generation of infrared optical systems. It has broad market prospects and application requirements. Compared with ordinary hard optical glass, chalcogenide glass has higher requirements on the mechanical properties of asphalt polishing compound. It is required that the asphalt polishing compound has appropriate stability, shape retention and penetration, otherwise, it is easy to cause chalcogenide glass optica...

AI Technical Summary

Problems solved by technology

The deficiencies in the prior art are as follows: the asphalt polishing glue and the polishing powder are not a combination. In the polishing process, the polishing liquid mixed with the polishing powder and water needs to be continuously poured into the surface of the processed component, and the polishing liquid is in the polishing glue and the optical fiber. The residence time of the contact surface of the component is very short, and it does not play a good role as a polishing medium, resulting in a great waste of polishing liquid and low polishing efficiency

In addition, the penetration of single-layer asphalt polishing glue is fixed. With the reduction of defects and scratches on the surface of chalcogenide glass lenses and the disappearance of pits, an asphalt polishing disc with different penetration should be replaced for polishing, resulting in polishing. Production discontinuities and high costs

Therefore, the existing polishing technology easily leads to many problems such as difficulty in controlling the surface shape accuracy of chalcogenide glass lenses, stress concentration or bursting, difficulty in controlling surface roughness and surface defects, and high processing costs.

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