Ultra-precision machining device and method for off-axis thin-wall aspherical optical element

Abstract

The invention discloses an ultra-precision machining device and method for an off-axis thin-wall aspherical optical element. The method includes the steps that first, the optical element is arranged in a wedge angle tool, the bottom plane of the optical element is attached to the top face of a groove of the wedge angle tool, and the aspherical face of the optical element is made to be leveled up; second, a through hole of the optical element is padded with a spacer; third, a washer is installed between the outer circle wall of the optical element and the top face of the wedge angle tool; fourth, the optical element, the spacer and the washer are synchronously milled and ground through a milling and grinding machine, and then the aspherical face of the optical element is milled and ground; fifth, the aspherical face, the spacer and the washer on the outer circle of the optical element are polished through a polishing machine. According to the method, the off-axis thin-wall aspherical optical element is precisely machined by ingeniously utilizing the wedge angle tool, the spacer and the washer, and thus the problem that the off-axis thin-wall aspherical optical element is hard to machine is solved.

Description

technical field [0001] The invention relates to a processing device and a processing method of an optical part, in particular to an ultra-precision processing device and a processing method of an off-axis thin-walled aspheric optical part. Background technique [0002] Such as figure 1 , 2 Shown is a schematic structural view of an off-axis thin-walled aspheric optical part. The optical surface of the optical part 1 is an aspheric surface 11, the angle between the symmetrical optical axis of the aspheric surface and the geometric central axis is the wedge angle α of the aspheric surface, and a There is a through hole 12, the precision of the wedge angle α of the finished optical part is within ±1′, and the thickness of the through hole at the central part is controlled within ±0.01mm. [0003] The aspheric processing technologies in the prior art include: optical glass molding technology, single-point diamond turning technology, classical tape repairing technology, magneto...

AI Technical Summary

Problems solved by technology

[0017] The object of the present invention is to provide an ultra-precision machining device and a machining method for off-axis thin-walled aspheric optical parts, and skillfully use wedge angle tooling, spacers and washers to precisely process off-axis thin-walled aspheric optical parts, solving the problem of off-axis Difficult Machining of Axial Thin-Walled Aspherical Optical Parts

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