Machining tool and processing method for Fischer prism

Abstract

The invention discloses a machining tool and a machining method for a Fischer prism. The machining tool comprises a tool base, the tool base is provided with a reference outer cylindrical surface, a positioning inner cylindrical surface and a supporting step surface, the axis of the reference outer cylindrical surface and the axis of the positioning inner cylindrical surface intersect at a presetintersection point and form a preset included angle, the preset intersection point is located in the plane where the supporting step surface is located, and the axis of the positioning inner cylindrical surface is perpendicular to the supporting step surface. During machining, an outer cylindrical surface and a lower reference plane are machined on the prism blank in advance, then the prism blankis assembled into a machining tool, after machining is completed, the axis of the positioning inner cylindrical surface coincides with the optical axis of the concave surface, and the axis of the reference outer cylindrical surface coincides with the optical axis of the convex surface. According to the machining tool, the positions of the optical axes of the convex face and the concave face can bealigned, the included angle between the curved faces can be machined without controlling the rotating angle of a shaft of a machining machine tool in the machining process, the machining path of thetool is simple, the machining process is simplified, and the machining difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of optical device manufacturing, and more specifically, to a processing tool and a processing method for a Ferry prism. Background technique [0002] A high spectral resolution detector refers to an instrument that uses a narrow and continuous spectral channel to continuously detect and image a target. The spectroscopic element is an indispensable and important device in the spectroscopic instrument, which directly determines the spectroscopic performance of the system. The Ferry prism is a curved beamsplitter prism proposed by Ferry in 1911 based on the principle of the Rowland circle. The prism has two spherical surfaces, one is convex and the other is concave. The optical axes of the two have a certain angle. . As an important spectroscopic element of the spectrometer, the Ferry prism has the advantages of small dispersion nonlinearity and compact structure compared with the traditional planar prism. At...

AI Technical Summary

Problems solved by technology

Due to the need to process a high-precision symmetry plane, and the need to design a special tool clamping structure and machining path, there are problems such as complex machining process, long machining time, and high cost.

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