An imaging-based macro measuring device, method and equipment

Abstract

The present disclosure provides an imaging-based macro-distance measurement device, method, and equipment, including an illumination source, an object to be measured, an imaging system, and a CCD camera connected to a processor; the illumination source includes two fiber laser sources, a light beam, and Displacement device, rotating ground glass and collimating lens, the light beam passes through the rotating ground glass and exits on the object to be measured through the collimating lens, the imaging system is a 4f imaging system with a pupil placed at the spectral plane, and the CCD camera is set in the imaging system The position of the imaging surface is used to detect the maximum light intensity value and the central light intensity value of the imaging surface position, and the processor is based on the light beam wavelength when the ratio of the central light intensity value to the maximum light intensity value is the smallest, and the distance between the two light beams on the rotating frosted glass. The distance between them and the focal length of the collimator lens can be used to obtain the size between the two ends of the object to be measured; the disclosure only needs to analyze the imaging light intensity of the object to be measured to calculate the size of the object, the measurement range can reach the micron level, and the accuracy can reach thousands four quarters.

Description

technical field [0001] The present disclosure relates to the technical field of macro-distance measurement, and in particular to an imaging-based macro-distance measurement device, method and equipment. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Micro-distance measurement has always been one of the essential operations in laboratories, industrial manufacturing and even national defense construction. Existing macro-distance measuring devices can be roughly divided into two types: traditional macro-distance measuring devices and new macro-distance measuring devices. Traditional micro-distance measuring devices such as vernier calipers, screw micrometers (micrometers), dial indicators, etc., can reach the highest accuracy of one thousandth of a millimeter, and are used to measure the size of one hundredth of a millimeter. It has the a...

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present disclosure found that when the measurement size is further reduced and the accuracy requirements are further improved, the measurement requirements cannot be met by using traditional devices, and the measurement objects are easy to be damaged due to artificial force and other reasons during measurement, and there is a large artificial error

The new macro-distance measurement devices mostly use optical principles, such as optical projectors, laser interferometers, optical microscopes, etc., and their measurement accuracy is higher, reaching the order of microns and nanometers, but these measurement devices require higher costs, or more for complex operations and algorithms

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