Super-precise turning method for free-form-surface prism

Abstract

The invention relates to a super-precise turning method for a free-form-surface prism. The method comprises the steps that multiple inner reflection surfaces of the free-form-surface prism needing super-precise turning are positioned online through optical probes, and the processing curved-surface-shaped deviation is detected and compensated. Based on a two-axis single-point diamond turning latheof the X axis and the Z axis, an adjustable tool structure clamped single time is designed for assisting in processing the free-form-surface prism, several to-be-processed curved faces of the free-form-surface prism can be freely switched online and positioned, and a wedge with a standard angle is adopted for assisting in adjusting the angles of the processed curved faces. When the free-form-surface prism is detected online, an optical probe is adopted, and the surface-shaped deviation and processing allowance of the processed curved surfaces are detected and compensated. Compared with the prior art, the super-precise turning method has the advantages that the method is suitable for multiple kinds of sizes, the manufacturing cost is lowered, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of optical device manufacturing and ultra-precision processing, in particular to a processing method for ultra-precision turning free-form surface prisms. Background technique [0002] Lenses in conventional optical systems are generally composed of multi-piece optical elements coaxially combined, but installation and debugging have always been difficult. Free-form surfaces are widely used in optical systems, among which free-form prisms are a new design concept proposed in recent years. Free-form prisms are a design that integrates multiple free-form surfaces into a single lens, which can provide multiple optimization freedoms degree and effectively improve the image quality of imaging. In the design of medium- and long-wave infrared viewfinders, the design configuration of the free-form surface prism will greatly fold the optical path, making the system compact. In addition, high-throughput and high-reso...

AI Technical Summary

Problems solved by technology

This patent uses a high-precision free-form prism special fixture to realize the position positioning and sequential processing of the free-form prism. However, after each surface is processed, the free-form prism and the fixture need to be removed from the machine tool, which seriously reduces the processing efficiency of the components.

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