Method for glass micro-crack detection by molecule stainer

Abstract

The invention provides a method used for detecting microcracks of glass by a molecule colorant, belonging to a real-time detection method in the technical field of optical cold working; the method comprises the steps as follows: after chunk glass is roughly machined, the chunk glass is arranged statically for several tens of hours so as to release the stress; subsequently, the surface of the chunk glass is corroded by acid, coated by the molecule colorant and arranged statically for several minutes; the colorant molecules infiltrate the interior of the microcrack passage till the bottom end by the compatibility of the glass on the aqueous solution and the scattering nature of the colorant; and the floating color on the surface of the chunk glass is washed away by water and the shape and depth of the microcrack can be clearly displayed, thus providing reliable basis for removing the microcrack. The method has the active effects that HF corrosion is used for reinforcing the chemical and mechanic performance of the glass surface, natural high-strength characteristic of the glass is partly recovered, the limits of microcrack theory detection method are overcome, the process flow is simplified, the processing time is saved, the processing cost is reduced, and the working efficiency and process quality are improved.

Description

technical field [0001] The invention belongs to the technical field of optical cold processing and relates to a method for detecting micro-cracks in real time in a process, which is ready-to-use. Background technique [0002] With the rapid development of my country's national defense construction and aerospace and aviation industries, higher processing and use requirements are put forward for optical components, which also increases the difficulty of the process. Rough grinding, fine grinding and polishing are the three basic processes in the processing of optical components. In the process of optical surface formation, each process has its own role. The purpose of rough grinding is to remove most of the margin of the blank, and to ensure a certain geometric shape accuracy and surface roughness. This process is completed by milling with a fixed diamond abrasive tool; fine grinding is to prepare for polishing and requires a more accurate The geometric shape and have a smal...

AI Technical Summary

Problems solved by technology

However, since its test range is only 40nm, it still has certain value for the processing of small-caliber optical components, and for slightly larger-caliber optical components, it is necessary to use SEM to observe surface microcracks in real time during processing. The distribution and control of the surface grinding amount will consume a lot of time, manpower and material resources. Obviously, this is not an ideal method for inspection of micro-crack processing.

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