Device and method for automatically detecting lens defects through modulation by optical grating

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

Active Publication Date: 2015-11-18
DANYANG JINGTONG GLASSES TECH INNOVATION SERVICE CENT
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  • Abstract
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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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  • Device and method for automatically detecting lens defects through modulation by optical grating
  • Device and method for automatically detecting lens defects through modulation by optical grating
  • Device and method for automatically detecting lens defects through modulation by optical grating

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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 device and a method for automatically detecting lens defects through modulation by an optical grating. The device comprises an isolation detecting system, a motion control system and a light source system, wherein the isolation detecting system is arranged in a camera bellows (13); the motion control system is arranged at the bottom of the camera bellows (13) and arranged on one side of the camera bellows (13); the device is characterized in that the optical grating (6) is fixed on a linear lead screw guide rail (5), a planar backlight (10) is fixed below a to-be-detected lens (4) in parallel and connected with a light source controller (11), and a main controller (12) controls the motion control system through a motion control card (9). According to the method, lens images are sampled twice through movement of the optical grating, the lens defects are classified, positioned and measured through analysis of gray values and morphological characteristics of bright and dark field images, and lens detection accuracy and efficiency are greatly improved.

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 Applications(China)
IPC IPC(8): G01N21/958
Inventor 孙力许生炎
Owner DANYANG JINGTONG GLASSES TECH INNOVATION SERVICE CENT
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