TWI695978B - Inspecting method for contact lens packaging - Google Patents

Abstract

A method for inspecting contact lens packaging is provided by erecting a packaging unit such that the contact lens in its lens cup can be located, subjected to gravity, at a lower edge of the lens cup, and the bubble in the lens cup can be located at the upper edge thereof. Thereby, the contours of the contact lens and the bubble do not overlap or only slightly overlap, and the contour of the bubble located at the upper edge of the lens cup is not in a circular shape, which helps to significantly improve the identification rate of machine vision.

Description

Contact lens bare chip packaging inspection method

The invention relates to a detection and detection method, in particular to a bare chip packaging and detection method for contact lenses.

Contact lens is a common vision correction lens, which can be divided into hard and soft contact lenses according to the material.

Common contact lens lenses currently on the market are packaged one by one into a bare chip packaging unit and sold. These bare chip packaging units include a panel, a lens cup provided on the panel, and a sealing film to seal the lens cup, and the lenses The cup contains a contact lens and water, and the rest is air.

Among them, the water in the lens cup should not be too low, otherwise the contact lens lens is prone to dry and harden due to long-term contact with air. But on the other hand, the water in the lens cup should not be too much, otherwise it is easy to keep the sealing film from being squeezed due to being squeezed.

Therefore, before contact lenses are shipped from the factory, a bare chip packaging test is required to check whether the water content in the lens cup is within the standard range. At present, part of the bare chip packaging inspection is recognized by machine vision, but because the contact lenses and bubbles in the lens cup have circular contours, and the contours of the two often overlap or are concentric, which makes machine vision recognition The rate of misjudgment is extremely high, so it is necessary to manually perform secondary detection.

In view of this, the main purpose of the present invention is to provide a method for improving the accuracy of bare chip packaging inspection.

In order to achieve the above and other objects, the present invention provides a method for testing the packaging of contact lenses, including:

Place at least one bare chip packaging unit on a testing platform. The bare chip packaging unit includes a panel, a lens cup provided on the panel, a contact lens lens accommodated in the lens cup, and a lens lens accommodated in the lens cup Water and air, and a sealing film attached to the panel and sealing the lens cup. The lens cup is transparent or translucent. The lens cup protrudes from the panel away from the sealing film and has a spherical contour;

A flip mechanism is used to flip the bare chip packaging unit to make the panel stand upright, so that the contact lens is subjected to gravity to be located at the lower edge of the spherical contour, and the bubble in the lens cup is located at the upper edge of the spherical contour, wherein the contour of the bubble The junction of water and air in the lens cup; and

When the panel is kept upright, use a lens to shoot the image of the lens cup on the side of the bare chip packaging unit away from the sealing film.

In this way, after the bare chip packaging unit is turned over, the contact lens and bubble are located just above and below the spherical contour of the lens cup, so that the contact lens and bubble contours do not overlap or only slightly overlap each other, and are located on the spherical contour The outline of the bubbles on the upper edge will not be round, which helps to greatly improve the recognition rate of machine vision.

Please refer to FIG. 1. In one embodiment of the present invention, the device as shown in the figure is applied, which includes a detection table 10, a turning mechanism 20 and a lens 30. The inspection table 10 is used to hold the bare chip packaging unit to be tested. The turning mechanism 20 is a multi-axis mechanism that can be displaced or turned in multiple dimensions. The turning mechanism 20 also includes a number of suction cups 21 equal to the number of bare chip packaging units. In order to selectively attract the bare chip packaging unit, the lens 30 is arranged to shoot images towards the turning mechanism 20.

The bare chip packaging inspection method according to one embodiment of the present invention will be described below through diagrams.

Please refer to FIGS. 2 and 3, a plurality of bare chip packaging units 40 are placed on the inspection table 10, the bare chip packaging unit 40 includes a panel 41, a lens cup 42 provided on the panel 41, and a lens cup 42 The contact lens 43 (shown in FIG. 7) inside, water (such as physiological saline) and air also contained in the lens cup 42, and a sealing film 44 that is attached to the panel 41 and seals the lens cup 42 , The lens cup 42 is transparent or translucent, so that machine vision can observe the internal contact lens 43 and bubbles 45 (as shown in FIG. 7) from the outside, and the lens cup 42 protrudes away from the sealing film 44 from the panel 41 and Has a spherical profile;

As shown in FIG. 4, the reversing mechanism 20 is lowered so that the suction cup 21 can attract the sealing film 44 of the die packaging unit 40, and then as shown in FIG. 5, the reversing mechanism 20 is raised to a height corresponding to the lens, and then as shown in FIG. As shown in FIGS. 6 and 7, the flip mechanism 20 flips the bare chip packaging unit 40 to make the panel 41 stand upright, so that the contact lens 43 is placed under the gravity by the gravity and the bubble 45 in the lens cup 42 is located on the spherical surface The upper edge of the outline, where the outline of the bubble 45 is the junction of water and air in the lens cup;

Next, as shown in FIG. 8, when the panel 43 is kept upright, the lens 30 is used to capture the image in the lens cup 42 on the side of the bare chip packaging unit 40 away from the sealing film 44.

The subsequent lens 30 transmits the image to a processor electrically connected thereto, and the processor determines whether the water in the lens cup 42 is within a predetermined range according to the outline of the bubble. In this image, the contours of the contact lens 43 and the bubble 45 usually do not overlap. Even if the two partially overlap, they are also arranged up and down without concentric circles, and the outline of the bubble 45 is not circular, so the processor does not It is prone to misjudgment. In an actual test, the misjudgment rate of the bare chip packaging inspection method of the present invention is less than 5%, and most of the misjudgment is not due to the overlapping of the contact lens lenses and the outlines of the bubbles; compared to the existing equipment Up to 30% to 40%, the technical means provided by the present invention greatly reduce the situation of misjudgment, which is an improved technology with a very significant technical effect.

10: Test bench 20: Flip mechanism 21: suction cup 30: lens 40: bare chip packaging unit 41: Panel 42: lens cup 43: Contact lens 44: Sealing film 45: bubbles

FIG. 1 is a perspective view of the equipment used with the bare chip packaging inspection method of the present invention.

Figures 2 to 8 are schematic diagrams of the inspection steps of the bare chip packaging inspection method of the present invention.

40: bare chip packaging unit

41: Panel

42: lens cup

43: Contact lens

45: bubbles

Claims (4)

A bare chip packaging inspection method for contact lenses, including: At least one bare chip packaging unit is placed on an inspection table, the bare chip packaging unit includes a panel, a lens cup provided on the panel, a contact lens lens accommodated in the lens cup, and the lens Water and air in the cup, and a sealing film that is attached to the panel and seals the lens cup, the lens cup is transparent or translucent, and the lens cup protrudes from the panel away from the sealing film and has a spherical surface contour; Using a flipping mechanism to flip the bare chip packaging unit to make the panel stand upright, so that the contact lens is under the force of gravity to be located at the lower edge of the spherical contour, and the bubbles in the lens cup are located at the upper edge of the spherical contour, The outline of the bubble is the boundary between water and air in the lens cup; and When the panel is kept upright, a lens is used to shoot the image of the lens cup on the side of the bare chip packaging unit away from the sealing film. The bare chip packaging inspection method according to claim 1, wherein the turning mechanism includes a number of suction cups equal to the bare chip packaging unit, and the suction cup is used to selectively adsorb the sealing film of the bare chip packaging unit. The die packaging inspection method according to claim 1, wherein when the die packaging unit is placed on the inspection table, the die packaging unit is horizontal. The bare chip packaging inspection method according to claim 1, wherein in the image, the contours of the contact lens and the bubbles do not overlap or are concentric.

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