JP3213909U - Contact lens detection system - Google Patents

Abstract

A detection device for detecting a residue of fragments on a contact lens is provided. A lens detection device includes a receiving seat, a backlight, two sidelights, and a detection camera. The receiving seat uses a contact lens to perform detection. The back light is installed below the receiving seat, the side lights are installed on both sides of the receiving seat, and the detection camera is installed above the receiving seat. The light from the backlight and the sidelight enters the lens separately or simultaneously to detect dirt, and the liquid is swung to determine the kind of dirt attached to the lens. Determine which manufacturing process needs to be improved by referring to the degree of dirt, that is, the quantity, leave lenses that can remove dirt, and discard only lenses that cannot remove dirt. This improves the lens yield. [Selection] Figure 1

Description

The present invention relates to a detection apparatus for detecting the remaining of fragments on a lens, particularly in a manufacturing process of a contact lens for correcting vision.

A contact lens for correcting vision is made of a material having oxygen permeability, and can be worn directly on the cornea of the eye to correct vision. Therefore, the contact lens is more convenient and comfortable than wearing glasses, and is highly popular with myopic people. However, before wearing the contact lens, the surface of the lens must be smoothed, and if there is foreign matter such as dust, particles or lens fragments, the sense of foreign matter may be felt during wearing and the cornea may be damaged. Therefore, in the manufacturing process and the packaging process of the contact lens, it is necessary to keep the lens surface free from foreign matters such as dust, particles, and lens fragments, and to protect the safety in use. In this way, when manufacturing contact lenses, in order to prevent the lens from wrapping with dust, particles, lens debris, etc. Need to be inspected.

Conventional lens detection devices for contact lenses are usually provided with a CCD detection camera and a backlight on both sides of the lens to be detected, respectively, and inspect whether foreign matter is attached to the surface of the lens.

However, the conventional lens detection device for contact lenses can detect the presence of black or dotted opaque foreign matter on the surface of the lens by using a backlight and a CCD detection camera. However, it is impossible to detect whether it is dust or particles or lens fragments. Further, the lens fragments may adhere to the lens and may float in the liquid for storing the lens, but cannot be detected by a conventional lens detection device. Whether foreign matter is dust or particles or lens fragments occurs in each manufacturing process, so if the type of foreign matter cannot be determined, it is not possible to determine which manufacturing process the problem. There was a need to improve.

In order to solve the above-described problems, a lens detection device for a contact lens according to the present invention is provided.

The lens detection device for a contact lens according to the present invention is:
A pedestal,
A backlight installed below the seat;
Two side lights respectively installed on both sides of the receiving seat;
A detection camera which is installed above the receiving seat and located above the backlight.

In such a contact lens lens detection device,
A lens having a convex surface and a concave surface, and the lens is placed so that the convex surface faces downward and the concave surface faces upward;
The detection camera is installed so as to face the concave surface of the lens,
The backlight is installed so as to face the convex surface of the lens,
It is preferable that the two side lights are respectively installed on both sides of the lens.

In such a lens detection device for contact lenses, it is preferable that the backlight is a light that emits light upward.

Such a lens detection device for a contact lens preferably has a swinging device connected to the receiving seat for swinging the receiving seat.

In such a contact lens lens detection device,
The swing device includes a leaving rail, a moving rail, and a moving member,
Among them, the abandoned rail extends horizontally and has a through hole extending in the vertical direction, and the receiving seat is slidably installed on the abandoned rail, and the backlight is positioned vertically above the through hole. The detection camera is located vertically below the through hole,
The moving rail is installed so as to be parallel to the neglected rail at an interval,
The moving member includes a pushing portion and a first power device, and the pushing portion is slidably attached to the moving rail to move a receiving seat on the leaving rail, and the first power device is It is preferable that the part is reciprocated along the moving rail.

In such a contact lens lens detection device,
The moving member includes a second power device, and the second power device is attached between the pushing portion and the moving rail, and extends or reverses the pushing portion, and is pushed by the second power device. It is preferable that the moving direction in which the part is extended or repositioned is perpendicular to the moving direction in which the pushing part is pushed and slid by the first power unit.

In such a lens detection device for a contact lens, each side light preferably includes a plurality of light emitting units.

In such a contact lens lens detection device,
The plurality of light emitting units of each sidelight are arranged in a straight line with the receiving seat, and the inner angle between the two straight lines arranged from the light emitting units of the two sidelights is set to be smaller than 180 degrees. preferable.

In such a lens detection device for contact lenses, the detection camera is preferably a CCD detection camera.

In such a lens detection device for a contact lens, the receiving seat preferably has a transparent and hollow shape.

If the lens detection device for a contact lens according to the present invention has the above-described configuration, the dirt adhering to the lens is a fragment adhering to the lens, or a fragment floating in the liquid. Since it is possible to detect whether there is dust or particles from the outside, it is possible to determine which manufacturing process needs to be improved with reference to the degree of contamination. Further, when the dirt is debris attached to the lens or dust or particles from the outside floating in the liquid, the dirt can be removed from the lens by rinsing or washing. On the other hand, if the dirt is debris adhering to the lens, the lens cannot be used and must be discarded. That is, if the contact lens detection device and the detection method according to the present invention are used, the lens that can remove the dirt is left and only the lens that cannot remove the dirt is discarded, so that the yield of the lens can be improved.

It is explanatory drawing of the lens detection apparatus which concerns on this invention. 3 is a flowchart of a first embodiment of a lens detection method according to the present invention. In the lens detection method which concerns on this invention, it is operation explanatory drawing in the case of performing step 1. FIG. It is explanatory drawing of the image which copied the to-be-detected lens with the detection camera in step 1 of the lens detection method which concerns on this invention. In the lens detection method which concerns on this invention, it is operation explanatory drawing at the time of performing step 2. FIG. It is explanatory drawing of the image which copied the to-be-detected lens with the detection camera in step 2 of the lens detection method which concerns on this invention. In the lens detection method which concerns on this invention, it is operation explanatory drawing at the time of performing step 3. FIG. It is explanatory drawing of the image which copied the to-be-detected lens with the detection camera in step 3 of the lens detection method which concerns on this invention. In the lens detection method which concerns on this invention, it is operation explanatory drawing at the time of performing step 4. FIG. It is explanatory drawing of the image which copied the to-be-detected lens with the detection camera in step 4 of the lens detection method which concerns on this invention. In the lens detection method which concerns on this invention, it is operation explanatory drawing at the time of performing step 5. FIG. It is explanatory drawing of the image which copied the to-be-detected lens with the detection camera in step 5 of the lens detection method based on this invention. It is a perspective explanatory view of the lens detection device concerning the present invention. It is a top view which shows the use condition of the lens detection apparatus which concerns on this invention. It is another top view which shows the use condition of the lens detection apparatus which concerns on this invention. It is explanatory drawing of the receiving seat in the lens detection apparatus which concerns on this invention. It is a flowchart of the 2nd Example of the lens detection method which concerns on this invention.

As shown in FIG. 1, the contact lens detection device according to the present invention includes a backlight 10, two sidelights 20, a detection camera 30, and a receiving seat 40.

The backlight 10 is a flat and plate-like light, and emits light upward. The two side lights 20 are respectively disposed on both upper sides of the backlight 10, and the side lights 20 are arranged in the vertical direction. A plurality of light emitting units 21 provided at intervals are provided. Each of the light emitting units 21 emits light in the horizontal direction, that is, in the horizontal direction. The detection camera 30 is an existing CCD detection camera, and is installed in a computer. The image from the detection camera 30 is connected and the computer determines. The receiving seat 40 has a transparent and hollow shape, and detects by inserting a contact lens.

As shown in FIGS. 13 to 15, this embodiment further includes a base 70 and a swing device 60, and an accommodation hole 71 is formed on the upper surface of the base 70, and in the vicinity of the accommodation hole 71. A support 72 is installed. The backlight 10, the sidelight 20, the detection camera 30, and the swing device 60 are each attached to a base 70. The backlight 10 is installed in the accommodation hole 71 of the base 70, and the detection camera 30 is attached to the support portion 72 of the base 70 so as to be positioned above the backlight 10.

The swinging device 60 includes a leaving rail 61, a moving rail 62, and a moving member 63. The leaving rail 61 and the moving rail 62 are arranged to be parallel to each other with a space therebetween, and in the horizontal direction. It is attached to the base 70 so as to extend, and further, a through hole 611 is formed in a position corresponding to the backlight 10 and the detection camera 30 in the standing rail 61 in the vertical direction. Therefore, the backlight 10 is positioned vertically below the through hole 611, and the detection camera 30 is positioned vertically above the through hole 611.

The receiving seat 40 is slidably installed on the leaving rail 61 so as to be movable above the through hole 611, and when it moves above the through hole 611, light from the backlight 10 is transmitted through the through hole 611. Through and into the transparent receptacle 40. As shown in FIG. 16, the receiving seat 40 in the present embodiment has a cylindrical shape, but may have another shape such as a square, and is used for combining with the left rail 61 or the moving member 63. A recess may be formed. If the recess is provided, the receiving seat 40 can be gently slid with respect to the leaving rail 61, and the moving member 63 can be simply moved by pushing the receiving seat 40. .

The moving member 63 includes a seat member 631, a first power device 632, a second power device 633, and a pushing portion 634. The seat member 631 is slidably attached to the moving rail 62, and The single power unit 632 is attached to the base 70 and moves the seat member 631 along the moving rail 62. In addition, although it is preferable that the 1st power unit 632 in a present Example is a drive motor of a single axis mechanical arm, it is not restricted to this. Further, the second power unit 633 is connected to the seat member 631 so as to be connected to the push part 634, and the second power unit 633 allows the push part 634 to extend or return to the left rail 61. The moving direction in which the pushing portion 634 extends or reverses by the device 633 is perpendicular to the moving direction in which the pushing portion 634 is pushed and slid by the first power device 632.

After the pushing portion 634 extends to the leaving rail 61, the receiving seat 40 on the leaving rail 61 is moved along the moving rail 62 via the second power unit 633, and the receiving seat 40 moves to a desired position. For example, when moving to the through-hole 611 of the leaving rail 61, the second power device 633 pulls back the pushing portion 634, and the first power device 632 moves the pushing portion 634 along the moving rail 62 via the second power device 633. To reinstate. According to this structure, it can prevent that the pushing part 634 and the receiving seat 40 interfere. In the present embodiment, the second power unit 633 is a cylinder, but is not limited thereto.

Further, when the receiving member 40 on the leaving rail 61 is pushed and moved to a desired position by the moving member 63, the contact lens and the liquid in the receiving seat 40 are reciprocally oscillated by inertia. Can be moved.
The rocking device 60 has the above-described configuration, but is not limited thereto, and any configuration can be used as long as the receiving seat 40 is rocked to reciprocally rock the internal contact lens and liquid. Good.

The two side lights 20 are installed on the upper surface of the base 70 so as to be positioned on both sides of the through holes 611 of the leaving rail 61, and the plurality of light emitting units 21 of the side lights 20 are connected to the through holes 611. A plurality of light emitting units 21 in the two side lights 20 are arranged in an L shape with the through holes 611, and an inner angle of the L shape is set to be smaller than 180 degrees. The height of the sidelight 20 is the height of the position corresponding to the receiving seat 40, and may be set to be the same as, slightly higher than, or slightly lower than the height of the receiving seat 40.

As shown in FIGS. 2 and 3, the first embodiment of the lens detection method according to the present invention includes the following steps.
Step 1: The lens 50 to be detected is placed in the receiving seat 40 so that the convex surface faces downward and the concave surface faces upward, the detection camera 30 faces the concave surface of the lens 50, and the backlight 10 faces the convex surface of the lens 50. As described above, it is assumed that the two side lights 20 are installed on both sides of the lens 50, and the foreign matters adhering to the lens 50 to be detected have three types of dirt A, dirt B, and dirt C. . As shown in FIG. 4, the dirt A is a fragment generated in the lens manufacturing process, and adheres to the concave surface of the lens 50, so it is difficult to remove from the lens 50, so it must be discarded. The dirt B is a fragment generated in the manufacturing process of the lens, but since it floats in the liquid, it can be removed from the lens 50, and the dirt C is a foreign matter such as dust and particles in the air. Although it adheres to the surface of the lens 50, it can be removed by rinsing or washing.

Step 2: The backlight 10 is turned on to check whether there is a black dot on the lens 50. As shown in FIGS. 5 and 6, the light emitted upward from the backlight 10 passes through the lens 50, and if there is dirt A, dirt B, or dirt C, the light is blocked, so that the detection camera 30 has a lens. An image with three black dots on 50 surfaces can be captured. That is, it can be detected that the lens 50 has three foreign substances, dirt A, dirt B, and dirt C.

Step 3: Turn on the sidelight 20 and check whether there is a bright spot on the lens 50. As shown in FIGS. 7 and 8, when the backlight 10 is turned off and the sidelight 20 is turned on, the light from the sidelights 20 on both sides is transmitted through the lens 50 and the light strikes the dirt A and the dirt B. Since the light is refracted or reflected by dirt A and dirt B that are fragments of the lens, the detection camera 30 captures an image having two bright spots on the surface of the lens 50. It can be detected that there are two foreign substances B. Further, since the dirt C is dust or particles in the air, the light from the sidelight 20 is not refracted or reflected, and a bright spot does not appear. Therefore, it is determined that the dirt A and dirt B are fragments of the lens. In addition, it is possible to determine that the dirt C is dust or particles.

Step 4: The backlight 10 and the sidelight 20 are turned on to check whether there is a bright spot on the lens 50. As shown in FIGS. 9 and 10, when the backlight 10 and the sidelight 20 are turned on at the same time, both the light from the backlight 10 and the light from the sidelight 20 pass through the lens 50. Since dirt B and dirt C block the light from the backlight 10, the dirt A and dirt B refract or reflect the light from the sidelight 20, and the dirt C does not reflect light. A bright spot does not appear, and since the light from the sidelight 20 passes through the dirt C, a black spot does not appear.
According to this method, since the detection camera 30 captures an image having two bright spots on the surface of the lens 50, it can be determined that the two bright spots are dirt A and dirt B. Then, it is again inspected that the dirt A and the dirt B are broken pieces of the lens, and that the dirt C is dust or particles from the outside.

Step 5: The lens 50 to be detected is swung laterally, the backlight 10 is turned on, and the black dot on the lens 50 is inspected. That is, as shown in FIGS. 11 and 12, the receiving seat 40 is moved left and right and moved backward to be rocked together with the lens 50. Then, the backlight 10 is turned on, and the detection camera 30 inspects whether the lens 50 has black dot-like dirt A and dirt B. The detection camera 30 may perform an inspection immediately after the receiving seat 40 is swung, or may perform detection while the receiving seat 40 is installed. Also, if the computer determines the position of the dirt and the original position (the position of step 3 or 4), the dirt B has moved to another position with respect to the lens 50, so that the dirt B floats on the liquid. It is discriminated as a broken piece of the lens that is not moving, and the dirt A that has not moved is discriminated as a broken piece adhering to the lens 50.
Further, in the present embodiment, the receiving member 40 is reciprocated by moving the moving member 63 along the leaving rail 61 using the swing device 60 described above, and according to this, the receiving member 40 is placed in the receiving seat 40. The lens 50 can also be swung laterally. In the present invention, the lens 50 may be swung horizontally by the above-described operation, but the lens 50 may be swung horizontally by another configuration or operation method.

Step 6: Contrast the results of inspection using human power or a computer. That is, by comparing the results of Step 2 and Step 3, if a black point is detected in Step 2 and a bright point is not detected in the same position in Step 3, this black point is not covered by dust or particles. is there. On the other hand, when the positions of the black point and the bright point detected in step 4 and step 5 are moved by comparing the results of step 4 and step 5, that is, the bright point detected in step 4 is changed in step 5. If a black dot is not detected at the same position, the position of this dirt (bright spot) has moved, so that it is judged that it is, for example, dirt B and a lens fragment floating in the liquid. In addition, if the black or bright spots are not dust or particles and are not debris of the lens floating in the liquid, it is, for example, a stain A. Is determined to be a fragment of the lens adhered to the lens. Note that the order of comparison between Step 2 and Step 3 described above and the order of comparison between Step 4 and Step 5 are not particularly determined.

According to the detection device and the detection method according to the present invention, the stain A is determined as a lens fragment adhering to the lens due to adhesion, and the stain B is determined as a lens fragment floating in a liquid. Since C can be identified as dust or particles from the outside, C determines which manufacturing process needs to be improved with reference to the degree of contamination, that is, the quantity.

Further, the dirt B and the dirt C are floating in the liquid, or are debris of the lens adhering to the lens 50 and dust or particles from the outside. C can be removed, and dirt A is completely attached to the lens, so the lens must be discarded. As described above, the contact lens detection device according to the present invention, when using the above-described detection method, leaves a lens that can remove dirt and discards only a lens that cannot remove dirt. This improves the lens yield.

As shown in FIG. 17, the second embodiment of the lens detection method used in the lens detection apparatus for contact lenses according to the present invention is almost the same as the first embodiment, but step 1 is different. In other words, in the second embodiment, the receiving seat 40 is not installed at the detection position in Step 1, and the receiving seat 40 is moved to the detection position in Step 2. That is, the receiving seat 40 is positioned below the backlight 10. Specifically, in step 1, the receiving seat 40 is disposed at a position where the lens 50 can be easily installed, and in step 2, the receiving seat 40 is moved to the detection position (the backlight 10 is turned on). It is immediately detected whether or not there is a black dot on the lens 50. At this time, since the receiving seat 40 has just been moved, the dirt inside of the receiving seat 40 is swung while floating due to inertia.

In step 3, it is detected again whether there is a black dot on the lens 50 (in a state where the backlight 10 is turned on), and it is detected whether there is dirt that is oscillating and moving due to inertia. Specifically, in step 2 and step 3, when the receiving seat 40 is moved to a desired position, two pictures are continuously photographed for detection, or in step 2, the first photograph is photographed. Then, after a predetermined time has passed, detection is performed after the second photo is taken in step 3, or the second photo is taken when the dirt stops moving in the receiving seat 40 in step 3. To detect. That is, it is only necessary to detect whether the black dot (dirt) moves due to inertia. Further, in step 1 and step 2 in the second embodiment, the receiving seat 40 is moved by the rocking device 60, but is not limited to this, and may be moved by another method or device. Since Step 4 and Step 5 in the second embodiment are the same as Step 3 and Step 4 in the first embodiment, detailed description thereof is omitted.

Finally, in step 6 in the second embodiment, the detection results are compared using human power or a computer. That is, the detection results of Step 2, Step 4 and Step 5 are compared, and if the detected black point moves in Step 2 and Step 4, or if Step 2 and Step 5 If the position of the black dot is moved, it can be determined that the black dot is a fragment of the lens floating in the liquid.

When the detection results of Step 3 and Step 4 are compared and a black point is detected in Step 3, but no bright point is detected at the same position in Step 4, this black point is dust or particles. And when all the detection results are contrasted, if the black or bright spot is not dust or particles, nor is it a debris of the lens floating in the liquid, this black spot or bright spot is completely adhered to the lens Judged as a broken lens.

In the second embodiment of the present invention, using the same principle, the stain A is determined as a lens fragment that is completely adhered to the lens, and the stain B is a lens fragment floating in the liquid. Since the dirt C is discriminated as dust or particles from the outside, the object according to the present invention can be achieved.

DESCRIPTION OF SYMBOLS 10 Backlight 20 Sidelight 21 Light emission unit 30 Detection camera 40 Receiving seat 50 Lens 60 Oscillating device 61 Standing rail 611 Through-hole 62 Moving rail 63 Moving member 631 Seat member 632 First power device 633 Second power device 634 Push part 70 Base 71 Housing hole 72 Support part A, B, C Dirt

Claims (10)

A pedestal,
A backlight installed below the seat;
Two side lights respectively installed on both sides of the receiving seat;
A lens detection device for a contact lens, comprising: a detection camera installed above the receiving seat and positioned above the backlight. A lens having a convex surface and a concave surface, and the lens is placed so that the convex surface faces downward and the concave surface faces upward;
The detection camera is installed so as to face the concave surface of the lens,
The backlight is installed so as to face the convex surface of the lens,
The lens detection device for a contact lens according to claim 1, wherein the two side lights are respectively installed on both sides of the lens. The lens detection device for a contact lens according to claim 1, wherein the backlight is a light that emits light upward. The contact detection lens detecting device according to claim 1, further comprising a swinging device connected to the receiving seat for swinging the receiving seat. The swing device includes a leaving rail, a moving rail, and a moving member,
Among them, the abandoned rail extends in the horizontal direction and has a through hole extending in the vertical direction, and the receiving seat is slidably installed in the abandoned rail, and the backlight is positioned vertically below the through hole. The detection camera is located vertically above the through hole,
The moving rail is installed so as to be parallel to the neglected rail at an interval,
The moving member includes a pushing portion and a first power device, and the pushing portion is slidably attached to the moving rail to move a receiving seat on the leaving rail, and the first power device is The lens detecting device for a contact lens according to claim 4, wherein the part is reciprocated along the moving rail. The moving member includes a second power device, and the second power device is attached between the pushing portion and the moving rail, and extends or reverses the pushing portion, and is pushed by the second power device. 6. The lens detection device for a contact lens according to claim 5, wherein a moving direction in which the portion is extended or restored is perpendicular to a moving direction in which the pushing portion is pushed and slid by the first power unit. The lens detection device for a contact lens according to claim 1, wherein each sidelight includes a plurality of light emitting units. The plurality of light emitting units of each sidelight are arranged in a straight line with the receiving seat, and the interior angle between the two straight lines arranged from the light emitting units of the two sidelights is set to be smaller than 180 degrees. The lens detection device for a contact lens according to claim 7. The contact detection lens detection apparatus according to claim 1, wherein the detection camera is a CCD detection camera. The lens detection device for a contact lens according to claim 1, wherein the receiving seat has a transparent and hollow shape.

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