TW201350838A - Device for inspecting contact lens edge - Google Patents

Abstract

This invention provides a device for inspecting contact lens edge, which is used to inspect at least one contact lens. The contact lens is placed in a carrier plate filled with buffer. A light projection module disposed under the carrier plate is used to generate a light source with short optical band projected onto the contact lens at a light emission angle. Then an image capturing module is placed on the light projection module corresponding to the position of the contact lens to receive the light source projected onto the contact lens and generate a white contrast edge image and a black contrast edge image for increasing the image resolution. In addition, the device can be used with automatic analysis and determination of a computer system to automatically inspect the edge defects of the contact lens, thereby achieving automated inspection.

Description

Contact lens edge detecting device

The invention relates to a contact lens edge detecting device, in particular to a contact lens edge detecting device which can enlarge an edge image of a contact lens.

According to the contact lens, there are many advantages compared with the frame glasses. For example, the contact lens does not have the obstacle of the general eyeglass frame, and only the thin lens can directly contact the eye to achieve the function of correcting the vision, and the frame glasses can affect the appearance of the wearer. And cause inconvenience in life and other diseases. Therefore, it is suitable for long-term wear, beauty, and sports people, and there is no need to worry about the risk of breaking the traditional frame lens.

Whether it is long-wearing, bi-weekly disposable or disposable disposable contact lenses, since contact lenses have a direct impact on the eye health of consumers, high-quality testing is required before leaving the factory to ensure product quality. . Each manufacturing procedure of the conventional contact lens requires the operator to handle the operation by hand, and then manually picks up the lens to filter the defective product, and judges which kind of defective piece is produced, but the production is quite Time consuming, labor intensive, and low detection efficiency. The quality of contact lens inspection mainly includes the flaw on the edge and the flaw inside the lens. Among them, the edge flaw is more common, including the edge unevenness or crack caused by the trimming, or the edge of the lens is damaged during the manual clamping process. In order to improve the detection efficiency of artificial visual inspection, the CCD device has been used for detection, the contact lens is placed in a transparent plastic container cup, and a backlight is used to back-illuminate a light source to the contact lens, and then the image is performed by the CCD device. After capturing, and the computer system zooms in on the captured image, it is manually detected to detect damage. Since the contact lens is very thin and light, the edge width of the contact lens is small, and the actual detection is relatively increased. The difficulty of the knowledge, together with the edge image of the existing contact lens can only present a dark line, that is, a black contrast image, for some of the finer defects are difficult to be identified, so the detection accuracy still needs to be improved.

In view of the above, the present invention has been directed to a missing contact lens edge detecting device in order to effectively overcome the above-mentioned problems.

The main object of the present invention is to provide a contact lens edge detecting device capable of controlling short-wavelength and light divergence angle to expand the edge image of the contact lens, thereby effectively improving the precision and yield of the detection, and also reducing the cost of manual detection and improvement. The process rate, which in turn greatly increases the competitiveness of the industry.

A secondary object of the present invention is to provide a contact lens edge detecting device which can exhibit a detection mode of two-color vision and can effectively improve the detection accuracy.

Another object of the present invention is to provide a contact lens edge detecting device which uses a wet detecting method to improve the sharpness of an image.

In order to achieve the above object, the present invention provides a contact lens edge detecting device for detecting at least one contact lens, the contact lens is disposed in a carrier tray, and the carrier tray is filled with a buffer to immerse the contact lens in the buffer. It has a protective effect in the liquid. The contact lens edge detecting device comprises a light projecting module and an image capturing module. The light projecting module is located below the carrier disk, and generates a short light band light source, and projects the light emitting angle onto the contact lens; the image capturing device The module is located above the light projecting module and corresponds to the position of the contact lens, and the image capturing module receives the light source projected on the contact lens to generate a white contrast edge image and a black contrast edge image, which can be transmitted to a computer system. Image processing is performed to automatically detect edge defects of the contact lens.

The following is explained in detail by way of specific embodiments, when it is easier to understand the purpose and technology of the present invention. Capacity, characteristics and the effects achieved.

As shown in FIG. 1 , the contact lens edge detecting device is configured to detect at least one contact lens 10 , the contact lens 10 is disposed in a carrier disk 12 , and the carrier disk 12 is filled with a buffer 14 to soak the contact lens 10 . It has a protective effect in the buffer 14, and can also be directly packaged after the detection, and the buffer 14 can be a preservation solution. Since the medium of the buffer 14 is larger than the air, the wet detection method of the present invention is higher than the resolution of the conventional dry detection. The contact lens edge detecting device includes a light projecting module 16 and an image capturing module 18. The light projecting module 16 is located below the carrier disk 12. The image capturing module 10 is located above the light projecting module 16, and corresponds to the invisible shape. The position of the glasses 10. During the detection, the light-emitting module 16 can be controlled to generate a light source of a short light band by a manual control mode or an automatic control mode, and projected onto the contact lens 10 at a specific light emission angle. The image capture module 18 includes at least one sensing component 182 and one of the image sensing mirrors 182. The image capturing mirror 184 receives the light source projected on the contact lens 10 and is sensed by the sensing component 182. The light source is measured to produce a white contrast edge image and a black contrast edge image. The sensing element 182 is a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

Please also cooperate with the 2a and 2b drawings, the contact lens 10 is caused by the light source of the short-light band irradiated by the light-emitting module 16, so that the edge defects of the contact lens 10 are highlighted, and at the same time, the divergence angle of the light is used to expand the contact lens 10. The edge width is such that the image capturing module 18 can obtain the white contrast edge image of the contact lens 10 according to the light emission angle greater than a preset value. As shown in FIG. 2a, the contact lens 10 is partially translucent. That is, the gray image, and the edge of the contact lens 10 presents a bright pixel, that is, a white line, and has a clearly identifiable edge thickness; otherwise, when the light emission angle is less than a preset value, the black contrast edge image of the contact lens 10 is obtained. As in 2b As shown, the contact lens 10 is partially a translucent image, that is, a gray image, and the edge of the contact lens 10 exhibits a dark pixel, that is, a dark line, and has a clearly identifiable edge thickness. The image capturing module 18 can be connected to a computer system 20 to instantly transmit the white contrast edge image and the black contrast edge image to the computer system 20 for image processing, thereby automatically detecting edge defects of the contact lens. In this way, by detecting the two-color vision, the detection accuracy can be improved, and any unacceptable defects or defects of the contact lens 10 can be effectively eliminated, thereby increasing the detection efficiency and effectively improving the yield of the product. The computer system 20 is further connected to the light projecting module 16, and the computer 20 automatically controls the light projecting module 16 to project the light source and the light emission angle of the preset short light band, thereby improving the operation efficiency of the overall process.

As shown in FIG. 3, in practical applications, a plurality of detecting disks 12 may be arranged in an array or a straight line on a conveying device, such as a conveyor belt 22, each of which contains a buffer 14 and The contact lens 10 can be used to automatically transfer the contact lens 10 to be detected between the light-emitting module 16 and the image capturing module 18 by using the conveyor belt 22, so as to conveniently detect a plurality of contact lenses 10 to be tested in sequence, as described above. The detection mode is not described here. Finally, the image capturing module 18 directly transmits the white contrast edge image and the black contrast edge image to the computer system 20, and the computer system 20 automatically determines whether the contact lens 10 has an edge.瑕疵, damage, etc.

In summary, the contact lens edge detecting device of the present invention is suitable for detecting a hard contact lens or a soft contact lens, and can adjust the light source and the light emission angle of the short light band to achieve the detection mode of the two-color vision and provide sufficient clearness. Recognizing the edge width of the contact lens not only saves the cost of manual inspection, but also speeds up the detection speed, and can solve the conventional image processing volume and complexity, thereby increasing the processing rate and greatly improving the industrial competitiveness.

The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. The scope of implementation. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

10‧‧‧Contact lenses

12‧‧‧ Carrying tray

14‧‧‧ Buffer

16‧‧‧Projection Module

18‧‧‧Image capture module

182‧‧‧Sensor components

184‧‧‧Photographing group

20‧‧‧ computer system

22‧‧‧Conveyor belt

Figure 1 is a schematic view showing the structure of the present invention.

Fig. 2a is a schematic view showing a white contrast edge image of a contact lens according to the present invention.

Figure 2b is a schematic illustration of a black contrast edge image of a contact lens in accordance with the present invention.

Figure 3 is a schematic view of another structure of the present invention.

10‧‧‧Contact lenses

12‧‧‧ Carrying tray

14‧‧‧ Buffer

16‧‧‧Projection Module

18‧‧‧Image capture module

182‧‧‧Sensor components

184‧‧‧Photographing group

20‧‧‧ computer

Claims (7)

A contact lens edge detecting device for detecting at least one contact lens, the contact lens is disposed in a carrier tray, and the carrier tray contains a buffer solution, and the contact lens edge detecting device comprises: a light projecting module Located below the carrier tray, a light source of a short light band is generated to be projected onto the contact lens at a light emission angle; and an image capture module is located above the light projecting module and corresponds to the position of the contact lens. The image capturing module receives the light source projected on the contact lens to generate a white contrast edge image and a black contrast edge image. The contact lens edge detecting device of claim 1, wherein the image capturing module is configured to obtain the white contrast edge image of the contact lens according to the light emission angle being greater than a preset value, wherein the light emission angle is less than At the preset value, the black contrast edge image of the contact lens is obtained. The contact lens edge detecting device of claim 1, wherein the image capturing module transmits the white contrast edge image and the black contrast edge image to a computer system for image processing, thereby automatically detecting the contact lens. Edge defects. The contact lens edge detecting device of claim 1, wherein the carrier disk is transported between the light projecting module and the image capturing module by a transport device to perform edge image detection of the contact lens. The contact lens edge detecting device of claim 1, wherein the contact lens is a hard contact lens or a soft contact lens. The contact lens edge detecting device of claim 1, wherein the image capturing module comprises One less sensing element and one of the sensing elements connected to the sensing element. The contact lens edge detecting device of claim 6, wherein the sensing element is a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).