Device and method for detecting and identifying glass defects

A glass defect and glass technology, which is applied in the field of detection of defects in glass, can solve the problems such as the inability to directly detect the Pt flash point in large-size glass, and achieve the effects of low manufacturing cost, reasonable structure and simple operation method

Pending Publication Date: 2018-06-22
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the inability to directly detect Pt flash point defects in large-size glass in the prior art, thereby providing a fast method for detecting and identifying defects in large-size glass, especially Pt flash point in glass Detection device and method

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  • Device and method for detecting and identifying glass defects

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Effect test

Embodiment 1

[0037] The device for detecting and identifying glass defects provided by this embodiment, such as figure 1 As shown, it includes a sample carrying unit, a defect detection unit and a defect discrimination unit, wherein the sample carrying unit includes a base 10, and a stage 9 arranged on the base 10, and the stage 9 can be moved up and down. Movement, used to adjust the height of the glass 8 to be detected, the light hole is provided on the stage 9, and the moving assembly 11 arranged on the stage 9, the moving assembly 11 is used to move the glass to be inspected The glass aligns the glass defect with the light hole; the defect detection unit includes a laser 1 that emits laser light and a beam expander 2 that expands the laser light. After the laser beam is expanded by the beam expander 2, it scans the glass to be detected 8. To determine the position of the glass defect, the defect detection unit also includes a shielding screen 3, which can be moved to block or not block...

Embodiment 2

[0040] This embodiment provides a method for detecting and identifying glass defects, which includes the following steps:

[0041](1) Polishing an ultra-short flint glass blank with a size of 300×300×40 mm.

[0042] (2) Start laser 1 and beam expander 2 (×10), said laser 1 is a commercially available 300mW single longitudinal mode green laser, wavelength 532nm, beam diameter 1.5mm; adjust stage 9, from the glass to be detected 8 Laser scanning is performed layer by layer from the bottom of the sample. If non-vitreous defects appear in the scanning area, the defect area is adjusted to the center position of the stage 9, and the laser scanning is suspended.

[0043] (3) Start the white light source 12, adjust the distance between the objective lens 4 and the glass 8 to be detected, and find non-vitreous defects in the field of view of the eyepiece 4 . Adjust the magnification (×100) of the eyepiece and objective lens to ensure that the defect image is clear. Adjust the polariz...

Embodiment 3

[0048] This embodiment provides a method for detecting and identifying glass defects, which includes the following steps:

[0049] (1) Polish the DM305 glass blank with a size of Φ400×30mm.

[0050] (2) start laser 1 and beam expander 2 (×5), described laser 1 is commercially available 200mW single longitudinal mode blue light laser, wavelength 457nm, beam diameter 1mm, open shielding screen 3, adjust stage 9, from Layer-by-layer laser scanning starts from the bottom of the glass sample. If there is a non-vitreous defect in the scanning area, adjust the defect area to the center of the stage 9, and use the shielding screen 3 to suspend the laser scanning.

[0051] (3) Start the white light source 12, adjust the distance between the objective lens 6 and the glass, and find non-vitreous defects in the field of view of the eyepiece 4. Adjust the magnification (×200) of the eyepiece and objective lens to ensure that the defect image is clear. Adjust the polarizer 5, if the defec...

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Abstract

The invention belongs to the technical field of glass defect detection, and particularly relates to a device and method for detecting and identifying glass defects and particularly Pt flashing pointsin glass. The device comprises a sample carrier unit, defect detecting unit and a defect distinguishing unit, the optical system structure of the detecting device is reasonable, and the device can beexclusively used in detecting the Pt flashing points in the glass; the device effectively solves the problem of the macroscopic optical quality detection of large-size glass, and the device completelyavoids a detection drawback of only detecting a small part of to-be-detected sample to judge whether or not the Pt flashing points exist in the large-size glass. The device not only can detect the Ptflashing points in the glass, but also can detect stones and bubbles in the glass, the device is multifunctional, and the device has low manufacturing cost; a defect position in the glass is firstlydetermined by the defect detecting unit during use, and then the defect distinguishing unit is started to identify a defect type in the glass, scan detection is carried out on the glass layer by layer, the defect position and type in the large-size glass can be accurately obtained, and the operational method is easy.

Description

technical field [0001] The invention belongs to the technical field of defect detection in glass, and in particular relates to a detection device and method for detecting and identifying glass defects, especially a Pt flash point in glass. Background technique [0002] At present, the preparation of high-quality optical glasses with high optical uniformity, no bubbles, and no stones must be carried out in Pt containers. Due to the high melting temperature of glass (≥1300°C), long homogenization time and strong corrosive components (such as PbO, Ta 2 o 5 , Sb 2 o 3 ), etc., the glass melt will have a certain destructive effect on the Pt container during the preparation process, thereby inevitably forming Pt flash point defects in the glass, thereby reducing the intrinsic quality of the glass. For example, the Pt flash point in laser glass will become the damage center when laser action is caused; the Pt flash point in advanced lens glass will cause imaging dispersion; the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/958
CPCG01N21/8806G01N21/8851G01N21/958G01N2021/8854G01N2021/8848
Inventor 王衍行祖成奎许晓典张超何坤王琪
Owner CHINA BUILDING MATERIALS ACAD
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