CN211669106U

CN211669106U - Optical system for detecting glass surface defects

Info

Publication number: CN211669106U
Application number: CN201922461853.6U
Authority: CN
Inventors: 陆鑫; 徐伟; 王翔
Original assignee: Kunshan Junwo Photoelectric Co ltd
Current assignee: Kunshan Junwo Photoelectric Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-13
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an optical system for detecting glass surface defects, which comprises a continuous zoom micro-distance objective, a shading sleeve, a microscope objective, a zoom device and a CCD camera; a shading sleeve is connected between the continuous zoom micro-distance objective and the microscope objective; a zoom device is connected between the microscope objective and the CCD camera; the CCD camera is connected with a computer; a zoom ring for changing the magnification and focusing is arranged on the shell of the lens body of the continuous zoom micro-distance objective lens; the zooming device comprises a first sleeve and a second sleeve which are connected in a sliding mode, the first sleeve is connected with the microscope objective, and the second sleeve is connected with the CCD camera. By adjusting the continuous zoom micro-objective and the zoom device, the continuous zoom imaging of the surface of the glass can be realized, the magnification of the optical system is adjusted as required, the glass quality is judged whether to reach the highest standard or not by fine detection under high magnification, and obvious defective products are eliminated by quick detection under low magnification, so that the automatic detection is realized, and the operation is convenient and quick.

Description

Optical system for detecting glass surface defects

Technical Field

The utility model belongs to the technical field of the glass surface detects, concretely relates to detect glass surface defect's optical system.

Background

At present, two methods are mainly used for detecting the defects on the surface of glass, one method is manual detection, the surface of the glass is directly observed through a stereoscopic microscope, and the defects of the glass are judged according to experience. The method is time-consuming and labor-consuming, depends on the experience of detection personnel, and has no quantitative judgment standard. One method is machine vision inspection, which automatically determines the defects of the glass by a machine through digital camera shooting and image processing. The method is fast and efficient, but the existing optical system of machine vision is imaging with low magnification, and imaging with fixed magnification, generally can only detect large defects, but cannot adjust the magnification according to the actual requirements and the defect grade to be detected so as to improve the detection efficiency.

Disclosure of Invention

The utility model provides a detect glass surface defect's optical system has solved the above-mentioned unable defect grade adjustment magnification that will detect in order to improve detection efficiency problem.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: an optical system for detecting glass surface defects comprises a continuous zoom micro-distance objective lens, a shading sleeve, a micro-objective lens, a zoom device and a CCD camera; the shading sleeve is connected between the continuous zoom micro-distance objective and the micro-objective; the zoom device is connected between the microscope objective and the CCD camera; the CCD camera is connected with a computer; the shell of the lens body of the continuous zooming micro-distance objective lens is provided with a zooming ring for changing the magnification and focusing; the zooming device comprises a first sleeve and a second sleeve which are in sliding connection, the first sleeve is connected with the microscope objective, and the second sleeve is connected with the CCD camera.

Furthermore, an installation ring is arranged at one end, far away from the shading sleeve, of the continuous zoom macro objective lens, and a plurality of through holes for installing the laser are uniformly distributed on the circumference of the installation ring. Which functions to provide detection light illumination.

Furthermore, an included angle is formed between the laser ray of the laser and the central line of the continuous zooming macro objective lens.

Further, the included angle ranges from 30 degrees to 60 degrees. The function of ensuring that the continuous zoom macro objective only receives diffuse reflection light at the defect position of the glass to be detected is achieved.

Furthermore, the shading sleeve comprises a large sleeve and a small sleeve which are connected in a sliding mode, the large sleeve is connected with the continuous zoom macro objective, and the small sleeve is connected with the micro objective. The function of conveniently adjusting the distance between the continuous variable-magnification macro objective and the micro objective to adapt to the change of the magnification is achieved.

Further, the telescopic tip of second is equipped with the rectangular channel, the CCD camera pass through the rectangular channel with second sleeve joint.

Furthermore, the outer surface of the zooming device is provided with multiple scales. The function of accurately adjusting the amplification factor is achieved.

Further, the large sleeve is in threaded connection with the continuous zoom macro objective, and the small sleeve is in threaded connection with the micro objective.

Further, an adjusting knob used for sliding the first sleeve and the second sleeve is arranged on the zooming device; and the shading sleeve is provided with an adjusting rotary block for sliding the large sleeve and the small sleeve.

The utility model discloses the beneficial effect who reaches: the first sleeve and the second sleeve are in sliding connection, so that the distance between the microscope objective and the CCD camera can be adjusted conveniently, and the magnification of the microscope objective can be adjusted continuously. The shading sleeve can isolate stray light, and the adjusting rotary block sliding sleeve of the shading sleeve is adjusted, so that the distance between the continuous variable-magnification macro objective and the micro objective is changed to adapt to the change of magnification, and a clear image is obtained. The CCD camera is connected with a computer to automatically detect the surface defects of the glass; by adjusting the continuous zoom micro-objective and the zoom device, the surface of the glass can be subjected to continuous zoom imaging, the magnification of the optical system can be adjusted according to the defect grade to be detected, the glass is finely detected under high magnification, whether the quality of the glass reaches the highest standard or not is judged, the glass is rapidly detected under low magnification, and obvious defective products are eliminated. Automatic detection is realized, the amplification factor is adjusted to adapt to the defect grade to be detected, and the method is flexible, efficient, convenient and quick.

Drawings

FIG. 1 is a block diagram of the present invention;

fig. 2 is a schematic diagram of the detection of the present invention.

In the figure: 1-continuously zooming micro-distance objective lens; 2-a light-blocking sleeve; 3-a microscope objective; 4-a zooming device; 5-a CCD camera; 6-a laser; 7-adjusting knob; 8-adjusting the rotary block; 9-glass to be detected; 10-a light shield.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in figure 1, the optical system for detecting the surface defects of the glass comprises a continuous variable-magnification macro objective 1, a shading sleeve 2, a micro objective 3, a variable-magnification device 4 and a CCD camera 5. A shading sleeve 2 is connected between the continuous zoom micro-distance objective 1 and the micro-objective 3; a zoom device 4 is connected between the microscope objective 3 and the CCD camera 5; the CCD camera 5 is connected with a computer. The shell of the body of the continuous zooming macro objective 1 is provided with a zooming ring for changing the magnification and focusing. The zooming device 4 comprises a first sleeve and a second sleeve which are connected in a sliding manner, the first sleeve is connected with the microscope objective 3, and the second sleeve is connected with the CCD camera 5. The first sleeve and the second sleeve are in sliding connection, so that the distance between the microscope objective 3 and the CCD camera 5 can be adjusted conveniently, and the magnification of the microscope objective 3 can be adjusted continuously. The CCD camera 5 is connected with a computer to automatically detect the surface defects of the glass 9; by adjusting the continuous zoom macro objective 1 and the zoom device 4, the continuous zoom imaging of the glass surface can be realized, the magnification of the optical system can be adjusted according to the defect grade to be detected, the glass quality can be judged whether to reach the highest standard or not through fine detection under high magnification, and obvious defective products can be eliminated through quick detection under low magnification. Automatic detection is realized, the amplification factor is adjusted to adapt to the defect grade to be detected, and the method is flexible, efficient, convenient and quick.

One end of the continuous zoom macro objective lens 1 far away from the shading sleeve 2 is provided with a mounting ring, and a plurality of through holes used for mounting the laser 6 are uniformly distributed on the circumference of the mounting ring, so that the function of providing detection light irradiation is achieved. The laser ray of the laser 6 and the central line of the continuous zooming macro objective 1 have a certain included angle. The included angle prevents the reflected light from entering the continuous zooming macro objective 1 when the laser irradiates on the flawless glass 9 to be measured. The included angle ranges from 30 degrees to 60 degrees, and the effect of ensuring that the continuous zoom macro objective 1 only receives diffuse reflection light at the defect position of the glass 9 to be detected is achieved. In this embodiment, the included angle between the laser beam and the center line of the continuous variable-magnification macro objective lens 1 is 45 degrees, a plurality of lasers 6 can be installed for multi-angle irradiation, and the laser convergence point is located on the center line of the continuous variable-magnification macro objective lens 1, so that various defects on the glass can generate obvious diffuse reflection.

The shading sleeve 2 comprises a large sleeve and a small sleeve which are connected in a sliding mode, and an adjusting rotary block 8 used for sliding the large sleeve and the small sleeve is arranged on the shading sleeve 2. The large sleeve is connected with the continuous variable-power macro objective 1, the small sleeve is connected with the micro objective 3, and when the shading sleeve 2 isolates stray light, the distance between the continuous variable-power macro objective 1 and the micro objective 3 can be conveniently adjusted to adapt to the change of magnification, so that a clear image is obtained. In this embodiment, the large sleeve is in threaded connection with the continuously variable-magnification macro objective 1, and the small sleeve is in threaded connection with the micro objective 3.

The zoom device 4 is provided with an adjusting knob 7 for sliding the first sleeve and the second sleeve. The tip of second sleeve is equipped with the rectangular channel, and 5 blocks of CCD camera are gone into in the rectangular channel, CCD camera 5 passes through rectangular channel and second sleeve joint promptly. The outer surface of the zooming device 4 is provided with multiple scales, so that the effect of accurately adjusting the magnification is achieved.

As shown in fig. 2, the arrows indicate the laser direction. In actual use, the whole optical system is covered by the light shield 10 to isolate stray light. The continuous zooming macro objective lens 1 is vertical to the surface of the glass 9 to be measured. The laser 6 at the end of the continuous zooming macro objective 1 emits laser, and a laser light source enters the glass 9 to be measured at an angle of 45 degrees. If the glass is not defective, the glass is emitted at an angle of 45 degrees; if the glass has defects, diffuse reflection occurs at the defects, the continuous zooming macro objective 1 is vertical to the surface of the glass 9 to be measured, and only the diffuse reflection light at the defects can be received. The continuous zooming macro-objective 1 can focus, adjust the magnification and make the glass 9 to be measured into a real image to the object surface of the micro-objective 3, the shading sleeve 2 is connected with the continuous zooming macro-objective 1 and the micro-objective 3 and shields the stray light, the micro-objective 3 is used for making the real image to be amplified to the light sensing surface of the CCD camera 5, the zooming device 4 is connected with the micro-objective 3 and the CCD camera 5, the magnification is changed by changing the distance between the micro-objective 3 and the CCD camera 5, and the zooming device has the function of shielding the stray light. The CCD camera 5 sends the shot pictures to a computer for image processing and identification, and the bright parts of the obtained images are defects, and the black parts of the obtained images are free of defects.

During measurement, a proper magnification factor is selected according to the defect grade to be detected, the adjusting knob 7 is adjusted according to the scale of the magnification factor on the zooming device 4, then the zooming ring of the continuous zooming macro objective 1 is rotated to focus, so that the image obtained by the CCD camera 5 is clear, and then the image processing is carried out by a computer. When the change of the magnification is large, sometimes the situation that no matter how the focusing ring is rotated, the image cannot be clear occurs, at this time, the adjusting rotary block 8 on the shading sleeve 2 should be properly adjusted, and the distance between the continuous variable-magnification macro objective 1 and the micro objective 3 is changed to adapt to the change of the magnification.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. An optical system for detecting glass surface defects is characterized by comprising a continuous zoom macro objective, a shading sleeve, a microscope objective, a zoom device and a CCD camera;

the shading sleeve is connected between the continuous zoom micro-distance objective and the micro-objective;

the zoom device is connected between the microscope objective and the CCD camera; the CCD camera is connected with a computer;

the shell of the lens body of the continuous zooming micro-distance objective lens is provided with a zooming ring for changing the magnification and focusing;

the zooming device comprises a first sleeve and a second sleeve which are in sliding connection, the first sleeve is connected with the microscope objective, and the second sleeve is connected with the CCD camera.

2. The optical system for detecting the surface defects of the glass according to claim 1, wherein a mounting ring is arranged at one end of the continuous zoom micro-distance objective lens, which is far away from the shading sleeve, and a plurality of through holes for mounting the laser are uniformly distributed on the circumference of the mounting ring.

3. The optical system of claim 2, wherein the laser beam of the laser is angled with respect to a centerline of the objective lens.

4. The optical system for detecting defects on a glass surface as claimed in claim 3, wherein the included angle is in the range of 30 ° to 60 °.

5. The optical system of claim 1, wherein the shading sleeve comprises a large sleeve and a small sleeve which are slidably connected, the large sleeve is connected with the continuous variable-magnification macro objective, and the small sleeve is connected with the micro objective.

6. The optical system for detecting surface defects of glass according to claim 1, wherein a rectangular groove is formed in an end of the second sleeve, and the CCD camera is clamped with the second sleeve through the rectangular groove.

7. The optical system for detecting surface defects of glass as claimed in claim 1, wherein the outer surface of the magnification-varying device is provided with magnification scales.

8. The optical system of claim 5, wherein the large sleeve is threaded to the objective lens and the small sleeve is threaded to the objective lens.

9. The optical system for detecting the surface defects of the glass as claimed in claim 5, wherein the zoom device is provided with an adjusting knob for sliding the first sleeve and the second sleeve; and the shading sleeve is provided with an adjusting rotary block for sliding the large sleeve and the small sleeve.