TW202234055A - Light source system and optical imaging detection system - Google Patents

Abstract

According to a light source system and an optical imaging detection system provided by the invention, an annular multi-channel light emitting diode (LED) light source assembly matches an optical convex lens to form a unique light source system, and then the light source system matches an image acquisition device to form the optical imaging detection system. The optical imaging detection system is applied to detection of color printing contact lenses, interference caused by color printing patterns in a printing area of the color printing contact lenses can be avoided, defect characteristics of the printing area are displayed in images, and the detection accuracy and the detection efficiency of product defects can be improved.

Description

Light source system and optical imaging detection system

The present disclosure relates to the technical field of optical detection, and in particular, to a light source system and an optical imaging detection system.

Color-printed contact lenses are printed with colored patterns on the surface of soft contact lenses through color printing technology and equipment. Under normal circumstances, the blank space in the center of the pattern is the optical zone of the lens, which is consistent with the function of ordinary contact lenses. The patterns and patterns in the color printing area play a beautifying role.

However, as shown in the existing optical imaging diagram as shown in Figure 1, the patterns and patterns in the color printing area will cover or overlap the defects in some areas of ordinary contact lenses in the optical imaging system. The color printing of color printing contact lenses detected by machine vision It is very difficult to detect regional defects, which in turn affects the detection accuracy and detection efficiency of product defects.

The present disclosure proposes a light source system and an optical imaging detection system.

In a first aspect, the present disclosure provides a light source system, the light source system includes: a ring light source assembly; a convex lens located on a light emitting side of the ring light source assembly, the convex lens is used to focus the annular light beam emitted by the ring light source assembly.

In some optional embodiments, the annular light source assembly is an annular multi-channel LED light source assembly, and the annular multi-channel LED light source assembly includes at least two annular LED light sources, and each annular LED light source corresponds to one channel.

In some optional embodiments, the annular multi-channel LED light source assembly further includes: a central LED lamp bead, each annular LED light source in the annular multi-channel LED light source assembly is arranged in sequence with the central LED lamp bead as the center, and each annular LED light source The LED lamp beads are connected in series.

In some optional embodiments, the ring-shaped multi-channel LED light source assembly further includes: a support structure for supporting the central LED lamp bead and each ring-shaped LED light source.

In some optional embodiments, the support structure includes a casing and a base, and the casing is fixedly connected to the base.

In some optional embodiments, the ring-shaped multi-channel LED light source assembly further includes: a multi-channel light source control unit, electrically connecting the central LED lamp bead and each ring LED light source, and the multi-channel light source control unit is used to independently control the correspondence of each ring LED light source channel.

In some optional embodiments, the multi-channel LED light source assembly further includes: a light scattering plate, which is arranged on the central LED lamp bead and the at least two annular LED light sources.

In some optional embodiments, the central LED lamp bead and each LED lamp bead of each ring LED light source are monochromatic LED lamp bead, ultraviolet LED lamp bead, infrared LED lamp bead or white light LED lamp bead.

In a second aspect, the present disclosure provides an optical imaging detection system, the optical imaging detection system includes: a transparent carrier, an image acquisition device, and the light source system according to the first aspect: the transparent carrier is located above the convex lens, and the transparent carrier is used for It is used to carry the detected object; the image acquisition device is located above the transparent carrier.

In some optional embodiments, the detected object is a color-printed contact lens.

In order to solve the problem in the existing optical imaging diagram, the patterns and patterns of the color printing area will cover or overlap the defects in some areas of the ordinary contact lens in the optical imaging system. The technical problem is quite high, which affects the detection accuracy and detection efficiency of product defects. The light source system and optical imaging detection system provided by the present disclosure use annular multi-channel LED light source components and optical convex lenses to form a unique light source system, and then The light source system is matched with the image acquisition device to form an optical imaging detection system. The application of the optical imaging detection system to the detection of color-printed contact lenses can avoid the interference caused by the color printing patterns in the printing area of the color-printed contact lenses, and display the defect characteristics of the printing area in the image, which is beneficial to improve the detection accuracy of product defects and detection efficiency.

The present disclosure will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. limit. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected", "connected" and the like should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a Removal connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of the present invention, it should be noted that the embodiments of the present disclosure and the features of the embodiments may be combined with each other without conflict.

FIG. 2 shows a schematic diagram of a light source system according to an embodiment of the present disclosure. As shown in FIG. 2 , the light source system in this embodiment includes a ring light source assembly 1 and a convex lens 2 . Wherein, the convex lens 2 may be located on the light-emitting side of the ring light source assembly 1 .

In this embodiment, the ring light source assembly 1 can be used to emit a ring light source. The convex lens 2 can be used to focus the annular light beam emitted by the annular light source assembly 1 to form an annular focused light source. The convex lens 2 may be a spherical convex lens or an aspheric convex lens.

In this embodiment, the ring light source assembly 1 and the convex lens 2 may be sequentially arranged on the frame (not shown in FIG. 1 ) from bottom to top. The ring light source assembly 1 and the convex lens 2 may be spaced apart by a preset distance. The foregoing preset distance may be set according to actual requirements, which is not limited in this embodiment.

Please refer to FIG. 3 and FIG. 4 . FIG. 3 shows a first structural schematic diagram of a ring-shaped multi-channel LED light source assembly according to an embodiment of the present disclosure. FIG. 4 shows a second schematic structural diagram of a ring-shaped multi-channel LED light source assembly according to an embodiment of the present disclosure.

In some optional embodiments, as shown in FIGS. 3 and 4 , the annular light source assembly 1 may be an annular multi-channel LED light source assembly. The annular multi-channel LED light source assembly may include at least two annular LED light sources. Each ring LED light source can correspond to one channel.

Here, the annular multi-channel LED light source assembly has the advantages of small size, low power consumption and low heat generation.

In some optional embodiments, as shown in FIG. 4 , the annular multi-channel LED light source assembly may further include a central LED lamp bead 31 . In the ring-shaped multi-channel LED light source assembly, each ring-shaped LED light source is arranged in sequence with the center LED lamp bead 31 as the center. The LED lamp beads of each ring LED light source are connected in series.

Here, FIG. 4 illustrates a four-channel LED light source assembly. The four-channel LED light source assembly includes a central LED lamp bead 31 , a first annular LED light source 32 , a second annular LED light source 33 and a third annular LED light source 34 , which can respectively correspond to corresponding channels in four different channels.

Here, the LED lamp beads of each annular LED light source are connected in series, that is, the LED lamp beads of each annular LED light source can be adjusted simultaneously.

In some optional embodiments, as shown in FIG. 3 , the annular multi-channel LED light source assembly may further include a support structure 35 . The support structure 35 is used for supporting the central LED lamp bead 31 and each ring-shaped LED light source.

In some alternative embodiments, as shown in FIG. 3 , the support structure 35 may include a housing 351 and a base 352 . The casing 351 can be fixedly connected to the base 352 .

In some optional embodiments, the annular multi-channel LED light source assembly may further include a multi-channel light source control unit (not shown in FIG. 3 ). The multi-channel light source control unit can be electrically connected to the central LED lamp bead 31 and each ring LED light source. The multi-channel light source control unit can be used to independently control the channels corresponding to each ring LED light source.

Here, the multi-channel light source control unit can independently set parameters such as light intensity of each ring LED light source, and can also independently control the switch of each ring LED light source to realize automatic adjustment of light source parameters.

In some optional embodiments, as shown in FIG. 3 , the multi-channel LED light source assembly may further include a light scattering plate 37 . The light diffusing plate 37 can be arranged on the central LED lamp bead 31 and at least two annular LED light sources.

Here, the light diffusing plate 37 can diffuse the LED point light sources, so that the light field formed by the annular LED light sources can be further uniformized.

In some optional embodiments, the central LED lamp bead 31 and each LED lamp bead of each ring-shaped LED light source may be a single-color LED lamp bead, an ultraviolet LED lamp bead, an infrared LED lamp bead, or a white light LED lamp bead.

In some optional embodiments, the multi-channel LED light source assembly may further include a light source control cable interface 36 .

Please refer to FIG. 5 , which shows a schematic structural diagram of an optical imaging detection system according to an embodiment of the present disclosure. The optical imaging detection system in this embodiment includes a transparent carrier 4 , an image acquisition device 6 and a light source system as shown in FIG. 2 . Wherein, the transparent carrier 4 may be located above the convex lens 2 .

In this embodiment, the transparent carrier 4 can be used to carry the detected object 5 . The image acquisition device 6 can acquire the image of the detected object 5 . The image capturing device 6 may be located above the transparent carrier 4 . The light source system, the transparent carrier 4 and the image acquisition device 6 may be sequentially arranged on the rack (not shown in FIG. 5 ) from bottom to top. The light source system (the ring light source assembly 1 and the convex lens 2 ), the transparent carrier 4 and the image acquisition device 6 may be spaced by a preset distance. The foregoing preset distance may be set according to actual requirements, which is not limited in this embodiment.

In some optional embodiments, the detected object 5 may be a color-printed contact lens.

Please refer to FIG. 6 , which shows an optical imaging diagram obtained by an optical imaging detection system according to an embodiment of the present disclosure.

As shown in the optical imaging diagram in Figure 6, the defect features in the printing area of the color-printed contact lens can be visualized in the image. Specifically, if the color-printed contact lens is free of defects, the resulting image is uniform because the color-printed contact lens is smooth and uniform throughout. If the color-printed contact lens is defective, since the defect destroys the optical uniformity of the color contact lens, a strong light scattering will be generated at the defect, so that bright spots or dark spots appear in the image.

The optical imaging diagram shown in FIG. 6 may be obtained by adjusting the optical imaging detection system provided by the present disclosure to a dark field illumination mode. Since the image acquisition device 6 is installed directly above the detected object 5 (color-printed contact lens), the light of the light source system does not directly enter the lens of the image acquisition device 6, so the image acquired by the image acquisition device 6 is affected by the luminous flux. Insufficient and black, forming dark field imaging. The defects on the color-printed contact lenses will scatter the light. The scattered light does not have a specific directionality. It scatters the light in all directions through scattering. The light scattered upward by the defect enters the lens of the image acquisition device 6, and forms bright spots, bright spots or bright lines on the image, so that the defects on the colored contact lens are revealed.

The light source system and the optical imaging detection system provided by the present disclosure use an annular light source assembly 1 (such as an annular multi-channel LED light source assembly) and an optical convex lens 2 to form a unique light source system, and then the light source system and the image acquisition device 6 can be formed. Combined, an optical imaging detection system can be formed. The application of the optical imaging detection system to the detection of color-printed contact lenses can avoid the interference caused by the color printing patterns in the printing area of the color-printed contact lenses, and display the defect characteristics of the printing area in the image, which is beneficial to improve the detection accuracy of product defects and detection efficiency.

The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the present disclosure is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover, without departing from the above-mentioned inventive concept, the above-mentioned technical features or Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above features with the technical features disclosed in the present disclosure (but not limited to) with similar functions.

1: Ring light source components 2: convex lens 31: Center LED lamp beads 32: The first ring LED light source 33: The second ring LED light source 34: The third ring LED light source 35: Support Structure 351: Shell 352: Base 36: Light source control cable interface 37: Light Diffuser Plate 4: Transparent carrier 5: Object to be detected 6: Image acquisition device

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Figure 1 is an existing optical imaging diagram; 2 is a schematic structural diagram of a light source system according to an embodiment of the present disclosure; 3 is a first structural schematic diagram of a ring-shaped multi-channel LED light source assembly according to an embodiment of the present disclosure; 4 is a second structural schematic diagram of a ring-shaped multi-channel LED light source assembly according to an embodiment of the present disclosure; 5 is a schematic structural diagram of an optical imaging detection system according to an embodiment of the present disclosure; FIG. 6 is an optical imaging diagram obtained by an optical imaging detection system according to an embodiment of the present disclosure.

1: Ring light source components

2: convex lens

Claims (10)

A light source system, comprising: Ring light source assembly; The convex lens is located on the light-emitting side of the ring light source assembly, and the convex lens is used for focusing the annular light beam emitted by the ring light source assembly. The light source system according to claim 1, wherein the annular light source assembly is an annular multi-channel LED light source assembly, and the annular multi-channel LED light source assembly includes at least two annular LED light sources, each of which corresponds to one annular LED light source aisle. The light source system according to claim 2, wherein the annular multi-channel LED light source assembly further comprises: A central LED lamp bead, the annular LED light sources in the annular multi-channel LED light source assembly are arranged in sequence with the central LED lamp bead as the center, and the LED lamp beads of each annular LED light source are connected in series. The light source system according to claim 3, wherein the annular multi-channel LED light source assembly further comprises: a support structure for supporting the central LED lamp bead and each of the ring-shaped LED light sources. The light source system according to claim 4, wherein the support structure comprises a casing and a base, and the casing is fixedly connected to the base. The light source system according to claim 3, wherein the annular multi-channel LED light source assembly further comprises: The multi-channel light source control unit is electrically connected to the central LED lamp bead and each of the ring LED light sources, and the multi-channel light source control unit is used to independently control the channels corresponding to each of the ring LED light sources. The light source system according to claim 3, wherein the annular multi-channel LED light source assembly further comprises: A light scattering plate is arranged on the central LED lamp bead and the at least two annular LED light sources. The light source system according to claim 3, wherein each LED lamp bead of the central LED lamp bead and each of the annular LED light sources is a monochromatic LED lamp bead, an ultraviolet LED lamp bead, an infrared LED lamp bead or a white light LED lamp beads. An optical imaging detection system, comprising a transparent carrier, an image acquisition device, and the light source system according to any one of claims 1-8: The transparent carrier is located above the convex lens, and the transparent carrier is used to carry the detected object; The image acquisition device is located above the transparent carrier. The optical imaging detection system according to claim 9, wherein the detected object is a color-printed contact lens.

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