Vacuum clamp for centering optical element in machining process

Abstract

The invention discloses a vacuum clamp for centering an optical element in the machining process and belongs to the field of optical manufacturing. The vacuum clamp solves the problem that due to the fact that a hammer and a dial indicator are used for centering a small and ultra-thin optical element in the traditional milling and polishing processes, edges of the optical element are broken and damaged. The clamp comprises the optical element, a vacuum clamp body, a sealing ring and a protecting layer. The sealing ring and the protecting layer are arranged on the vacuum clamp body. The optical element is arranged on the protecting layer. The clamp further comprises an adjusting support and a differential nut. The adjusting support is fixed on the side face of the vacuum clamp body. The differential nut is fixed to the adjusting support. The optical element is centered through the adjusting support. According to the vacuum clamp for the optical element in the machining process, by means of trace precise adjustment of the differential nut, and the small and ultra-thin optical elements can be centered safely and fast in the machining process.

Description

technical field [0001] The invention belongs to the field of optical manufacturing, and in particular relates to a vacuum fixture for processing and centering optical elements. Background technique [0002] As optical instruments are increasingly used in aerospace applications, the demand for ultra-light, ultra-thin optical components is also increasing. Optical components need to effectively control the eccentricity of the components during the manufacturing process, which requires a high-precision centering method. In the processing of optical components, optical components often use such as figure 1 The shown vacuum adsorption clamping method needs tools such as a dial indicator and a hammer to manually tap the edge of the mirror for centering. The mirror produces micro-displacement under the instantaneous impact force of the hammer to achieve centering. For large and medium-sized components, this method is more feasible; for small and ultra-thin components, hammering ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of edge chipping and damage caused by the centering of hammers and dial gauges used in the process of milling and polishing centering of traditional small and ultra-thin optical elements, and to provide a kind of optical element processing Vacuum fixture for centering

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