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A grating modulation lens defect automatic detection device and method

An automatic detection and grating technology, which is used in measuring devices, material analysis by optical means, instruments, etc., to achieve the effect of improving efficiency

Active Publication Date: 2018-03-27
DANYANG JINGTONG GLASSES TECH INNOVATION SERVICE CENT
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the deficiencies in manual detection and existing research, the purpose of the present invention is to provide a device and method for rapid detection of defects applicable to different types of lenses, to improve detection accuracy and efficiency, and to provide a basis for online detection of lenses

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  • A grating modulation lens defect automatic detection device and method
  • A grating modulation lens defect automatic detection device and method
  • A grating modulation lens defect automatic detection device and method

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Embodiment Construction

[0026] Introduce detailed technical scheme of the present invention below in conjunction with accompanying drawing: as figure 1 As shown, a grating-modulated lens defect automatic detection device includes an image acquisition device 1, a camera fixing frame 2, a lens fixing frame 3, a lens to be inspected 4, a linear screw guide rail 5, a grating 6, a stepping motor 7, Motor driver 8, motion control card 9, planar backlight source 10, light source controller 11, main controller 12, camera obscura 13 and image acquisition, image acquisition device 1 is vertically fixed on the top of the device through camera holder 2, and through USB3.0 The interface is connected to the main controller 12, and the image acquisition device 1 is on the same vertical plane as the center line of the inspected lens 4, the grating 6 and the plane light source 10; the inspected lens 4 is fixed parallel to the image acquisition device 1 through the lens holder 5 Between and the grating 6; the grating ...

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Abstract

The invention discloses a grating-modulated lens defect automatic detection device and method, comprising an isolation detection system, a motion control system and a light source system, the isolation detection system is set in the dark box (13), and the motion control system is set in the dark box (13). The motion control system is set on one side of the camera obscura (13), and it is characterized in that: the grating (6) is fixed on the linear screw guide rail (5), and the plane backlight (10) is fixed parallel to the lens to be inspected (4) below and connected to the light source controller (11), the main controller (12) controls the motion control system through the motion control card (9). This method samples the lens image twice by moving the position of the grating, and realizes the classification, location and measurement of lens defects by analyzing the gray value and morphological features in the bright and dark field images, which greatly improves the The accuracy and efficiency of lens inspection.

Description

technical field [0001] The invention relates to a device and method for automatic detection of lens defects by grating modulation, in particular to a method and device for automatically detecting defects on the lens surface by using a grating to modulate a plane backlight and using machine vision technology. Background technique [0002] Lens defect detection is not only an important link to ensure the pass rate of ex-factory lenses, but also an effective method to monitor the production process. At present, the detection of lens defects is still all done by manual detection, and manual detection largely depends on the experience and technology of the inspectors, and is easily affected by subjective factors, individual differences and other factors, and the false detection rate is high. The invention patent with the patent number 201210180997.4 proposes a method for quickly detecting lens defects by using machine vision, but this method cannot accurately distinguish the type...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/958
Inventor 孙力许生炎
Owner DANYANG JINGTONG GLASSES TECH INNOVATION SERVICE CENT
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