Six-face fraction rotating drum angular error testing device and method

Abstract

The invention relates to a six-face fraction rotating drum angular error testing device and method, in particular to a stochastic digital vision reading system using a photoelectric auto-collimator to conduct a six-face fraction rotating drum angular error test. The six-face fraction rotating drum angular error testing device and method are characterized in that the six-face fraction rotating drum angular error testing device comprises an optical dividing head, a reflecting mirror, an objective lens, a spectroscope, a cross reticle, a collecting lens, an area array CCD, a pattern collecting device, a computer and a light source, wherein the objective lens, the cross reticle, the collecting lens and the light source are arranged in sequence, the spectroscope is arranged between the objective lens and the cross reticle, the reflecting mirror is arranged between the objective lens and a six-face fraction rotating drum placed on the optical dividing head, the area array CCD is arranged below the spectroscope, the pattern collecting device is connected with the area array CCD and the computer, and the computer is connected with a reading controller of the optical dividing head. The six-face fraction rotating drum angular error testing device and method provide high-precision form and position error analytical data for production departments and research departments.

Description

technical field [0001] The invention relates to a method for testing angle errors, in particular to a digital visual reading system, which utilizes a photoelectric autocollimator to test the angle errors of a six-sided refraction drum. Background technique [0002] In the infrared machine scanning system, the scanning accuracy of the six-sided refracting drum is an important index in the whole system, so the high-precision detection technology of the central angle and inclination angle of the six-sided refracting drum is one of the key technologies in the scanner manufacturing process one. With the continuous development of infrared technology, higher requirements are put forward for the accuracy and reliability of the angle test of the six-sided refracting drum. It has become an inevitable trend to study the high-precision angle error measurement of the six-sided refracting drum. [0003] The traditional method of measuring the angle error of the drum is to use the optical...

AI Technical Summary

Problems solved by technology

[0004] 1. Poor accuracy and repeatability: The alignment of the cross differentiation image of the autocollimation theodolite mainly depends on the human eye, and visual inspection has a large artificial influence on its readings, resulting in low test accuracy and repeatability;

[0005] 2. The test operation is complicated and the efficiency is low. When measuring the center angle, since the refraction drum has a certain inclination angle, the autocollimation theodolite needs to continuously adjust the pitch angle to read, and the center angle and inclination angle are tested twice, and need to be replaced in the middle Different fixtures are inconvenient to operate and low in efficiency;

[0006] 3. The test and analysis cycle is long. A six-sided refracting drum has a total of six surfaces, six central angles, and six inclination angles. There are a total of twelve angles to be tested. The tested angles need to be manually checked for adjacent and opposite surfaces. The angle error calculation and the relative surface parallelism calculation can be used to analyze and judge whether it meets the requirements of use. The amount of manual calculation is large and the error rate is high. Repeated calculations and inspections are required before the test analysis report can be issued, resulting in a long test period for parts and slow circulation. slow

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