Three-point-supported automatic rotating angle detection tool

Abstract

The invention belongs to the technical field of optical detection and provides a three-point-supported automatic rotating angle detection tool so as to solve the problem of surface-shaped errors caused by gravity deformation in the prior art. The automatic rotating angle detection tool comprises a base, rotating devices and limiting devices. Three small supporting balls are evenly distributed on the circumference of the upper end of the base and make contact with the lower surface of a workpiece to be detected. The limiting devices are arranged at the positions, corresponding to the three small supporting balls, of the base respectively and used for limiting the workpiece to be detected. The rotating devices are arranged between every two adjacent limiting devices in the circumferential direction of the upper portion of the base. Each rotating device comprises a rotating block, a rotating head and a motor, wherein the rotating head is arranged on the rotating block and makes contact with the sidewall of the workpiece to be detected, the motor is used for controlling rotation of the rotating head and then driving the workpiece to be detected to automatically rotate. According to the automatic rotating angle detection tool, the motors are used for driving the rotating heads of the rotating devices to rotate and then driving the workpiece to be detected to rotate, average measurement in the rotating process is achieved, errors caused by external artificial factors are eliminated, and manpower and time are saved.

Description

technical field [0001] The invention belongs to the technical field of optical detection, in particular to an automatic rotation angle detection tool under three-point support. Background technique [0002] In the process of high-precision optical detection, with the improvement of detection accuracy, the requirements for the surrounding environment and auxiliary support technology are also getting higher and higher. In interference detection, we need to place the workpiece to be inspected on a specific tool supported by three points for inspection. Under the action of gravity, the surface of the optical element will deform, causing this fixed surface shape change to be included in the measured optical element surface shape. The error introduced by this part of the deformation is very serious for high-precision measurement and must be eliminated. Usually, the surface error introduced by the rotation average method is removed. [0003] In the actual rotation average detecti...

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Problems solved by technology

[0004] The purpose of the present invention is to propose an automatic rotation angle detection tool under three-point support, which solves the problem of surface shape error caused by gravity deformation in the prior art, realizes automatic rotation at a predetermined angle, and completes rotation average measurement

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