Asynchronous exposure double-view-field imaging system and method

By using an asynchronous exposure dual-field imaging system and employing folded optical paths and timing control technology, the problems of high hardware costs and low detection efficiency in existing technologies have been solved, achieving low-cost, high-efficiency, and high-precision large-size industrial visual inspection.

CN121357408AActive Publication Date: 2026-01-16JIHUA LAB
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Patent Information

Application Number
CN202511895017.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-01-16
Estimated Expiration
2045-12-16

AI Technical Summary

Technical Problem

Existing large field-of-view inspection technologies are either expensive in terms of hardware or have low inspection efficiency and poor stability, and cannot simultaneously meet the comprehensive needs of industrial production for low cost, large field of view, high efficiency and high precision.

Method used

An asynchronous exposure dual-field imaging system is adopted. By combining a single linear array camera with a symmetrical lens, a mirror group, and a non-polarized beam splitter cube to form a folded optical path, the optical information of two independent fields of view is merged. A precise timing control module drives the strobe light source and the camera line trigger signal to work alternately, realizing asynchronous exposure and image acquisition within the odd and even line cycles.

Benefits of technology

It achieves low-cost dual-field-of-view coverage, improves detection efficiency, ensures image quality stability and geometric fidelity, reduces dependence on high-precision motion platforms, simplifies system structure and maintenance, and is suitable for large-scale industrial production line applications.

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Abstract

The invention relates to the technical field of industrial visual inspection, and discloses an asynchronous exposure double-view-field imaging system and method, and the system can achieve the merging of independent view field images collected by two parallel lenses into a single linear array camera through a reflector and a non-polarization beam splitting cube based on the asynchronous exposure double-view-field imaging system. Meanwhile, in cooperation with precise time sequence control, the system drives two independent stroboscopic light sources to be synchronous with line trigger signals of the camera, different view fields are alternately illuminated in odd-even line periods, the camera is made to perform asynchronous exposure, and two paths of image information are collected in a time-sharing mode; and finally, reconstructing two complete, independent and seamlessly spliced detection images from the interleaved data streams through an odd-even line separation algorithm. According to the invention, with the hardware cost of a single camera, the detection visual field is obviously expanded, the detection efficiency and the image geometric precision under the high-line scanning frequency are ensured, and the excellent balance of the performance, the cost and the efficiency is realized.
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