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Professional Analysis of the Factors Causing the Errors of Image Surveyor in Dongguan

Source: Time:2018-04-08 11:54:39 frequency:

Measurements on the image measuring instrument are measured in single-axis or two-dimensional plane coordinates. The measurement is first focused, then aligned, then read (counted), and finally calculated. The readings come from the scale, the grating system, the focus alignment depends on the microscope optics
Measurements on the image measuring instrument are measured in single-axis or two-dimensional plane coordinates. The measurement is first focused, then aligned, then read (counted), and finally calculated. The readings come from the scale, the grating system, the focus alignment depends on the microscope optics, and there is an illumination source that directly affects the measurement and accuracy, because the instrument based on the image method, if the device under test cannot be effectively and correctly illuminated, The result of the measurement obviously deviates from its true size. In addition to the aforementioned factors, environmental conditions are also factors that can not be ignored in measuring measurement accuracy. Based on the above analysis, we can summarize the sources of error in the following aspects:
(1) the error of the grating scale ruler;
(2) Errors caused by straightness and angular pendulum when the table moves;
(3) The error caused by the verticality of the two measuring axes of the workbench;
(4) The error caused by the optical axis of the microscope and the work surface are not perpendicular;
(5) The error caused by the measurement chamber temperature deviating from the reference temperature of 20 °C;
(6) Focus and alignment errors caused by changes in lighting conditions of the light source.

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