Microscope device for detecting printed circuit board (PCB)

Abstract

The invention discloses a microscope device for detecting a printed circuit board (PCB), which comprises a working platform, a support which is fixed on the working platform, a charge coupled device (CCD) microscopic imaging lens which is installed on the support and a PCB carrying platform which is arranged below the CCD microscopic imaging lens; and the microscope device is characterized in that the working platform is provided with a movable seat through an X-axis electric-control lead screw transmission pair, the movable seat is provided with the PCB carrying platform through a Y-axis electric-control lead screw transmission pair, the CCD microscopic imaging lens is installed on the support through a Z-axis electric-control lead screw transmission pair, the Z axis is vertical to the working platform, and the X axis, the Y axis and the Z axis form a spatial right-angled coordinate system. The microscope device has high adaptability aiming at the PCB size specification and is convenient for the CCD microscopic imaging lens to carry out the fixed-point imaging photography on a detect part on the PCB, so that the detection effect is guaranteed.

Description

technical field [0001] The invention relates to a microscope device for PCB detection. Background technique [0002] With the development of electron microscope imaging technology, a special PCB microscope is usually used for defect detection on processed (for example, drilled) PCBs. Existing PCB microscopes mainly include two parts, one is a CCD microscopic imaging lens installed on a bracket and can be adjusted in height up and down, and the other is a PCB loading platform located below the CCD microscopic imaging lens. In actual work, by adjusting the focal length, the CCD microscopic imaging lens can record the complete imaging of the PCB below on a picture, and then the defect parts (breakage or spots, etc.) on the PCB are screened by computer or manually. [0003] However, the defect of the above-mentioned existing PCB microscope is that it has poor adaptability to the size specifications of PCB products, and often can only meet the imaging inspection of PCBs with sma...

AI Technical Summary

Problems solved by technology

[0003]However, the defect of the existing PCB microscope mentioned above is that it has poor adaptability to the size specifications of PCB products, and often can only meet the requirements of small size specifications (such as conventional 220mm× 160mm small-size PCB) PCB imaging inspection; and for PCBs with larger sizes (for example, the existing type of PCB can reach 650mm×710mm), it is often impossible to record the image of the entire PCB at one time. Of course, even by adjusting the focal length After recording the whole picture of a large-size PCB, it is often impossible to obtain a clear detailed image, which causes inconvenience to the identification of defective parts

[0004]On the other hand, due to the lack of a mechanism to drive the CCD microscope imaging lens to move back and forth relative to the PCB loading platform, the existing PCB microscope cannot fix the PCB defect Imaging shooting to facilitate further detailed observation and improve the detection effect

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