Big-field-depth imaging system and method based on prism beam splitting

Abstract

The invention provides a big-field-depth imaging system and method based on prism beam splitting. The system comprises a lens assembly which is used for collecting reflected light emitted by a photographed object; a beam splitting prism group which comprises a plurality of beam splitting prisms and is used for splitting the reflected light passing through the lens assembly into a plurality of subbeams; at least two imaging elements which are located on an imaging plane of the beam splitting prism group and are used for receiving subbeams and capturing clear images of different surfaces of thephotographed object; a field depth adjustment assembly which adjusts the distances some or all imaging elements and the beam splitting prisms. The beam splitting prisms and the imaging elements located on different imaging planes of the beam splitting prisms are employed, and the field depth adjustment assembly is used for adjusting the distances between all imaging elements and the beam splittingprisms and achieving a purpose that the imaging elements capture clear images of different surfaces of the photographed object. According to the technical scheme of the invention, the system capturesthe images of different surfaces of the photographed object when the system is stationary, thereby avoiding the motion error and timeliness caused by the motion of the imaging system.

Description

Technical field [0001] This application designs the field of vision imaging technology, and in particular relates to a large depth of field imaging system and method based on prism splitting. Background technique [0002] Depth of field refers to the range of the front and back distance of the object measured by imaging that can obtain a clear image at the front of a camera or other imager. In the application of machine vision high-precision measurement system, the depth of field of conventional imaging systems is limited at higher resolutions, so It is not possible to image the same object at two different distances from the lens at the same time. [0003] The current common imaging system that solves high precision and large depth of field consists of an electronic control mechanism, a single camera and a lens. If the subject is located directly under the lens, the imaging system is controlled by a motor to move in the vertical direction along the upper surface of the subject dur...

AI Technical Summary

Problems solved by technology

When the motor-controlled imaging system is used to image images on two different height planes of the product along a certain direction, certain errors often occur. This error is caused by the accuracy of the motor during the movement process, and the motor drives the imaging system to move. Separate imaging of different height planes will lead to poor timeliness of the imaging system

[0004] Therefore, the above technical problems have not been effectively solved

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