TW200525204A - Contact lens manufacture - Google Patents

Abstract

A method for tracking multiple SKUs of contact lenses in a manufacturing line comprising the steps of: (a) moulding a plurality of contact lenses; (b) providing a plurality of carriers each having a carrier indicator; (c) inspecting each contact lens to determine information relating to its prescription; (d) transferring each lens to a carrier; (e) reading the carrier indicator of the carrier of step (d) and; (f) storing in machine-accessible memory the information associated with the carrier indicator of the carrier of step (e) and the information relating to the lens for step (c).

Description

200525204 V. Description of the invention α) [Technical field to which the present invention belongs] The present invention relates to a method for manufacturing contact lenses, in particular, a method for manufacturing and tracking contact lenses on a production line, so multiple sku ( Inventory unit). [Prior art] An automated method of producing contact lenses is to sandwich a reaction mixture between two molds having convex and concave optical surfaces to form a contact lens. The reaction mixture is applied to the concave surface forming the front curved surface of the lens and the second mold is located on the first mold so that the convex surface forming the rear curved surface of the lens is located on the concave surface and defines a cavity between the convex and concave surfaces. After the reaction mixture in the combined mold is hardened, the monomers in the cavity are polymerized. Typical contact lens hardening methods include UV hardening and thermal hardening. After hardening is completed, the mold is separated and the formed lens is removed. Lenses must go through a series of process steps such as inspection, hydration, primary packaging, labeling and secondary packaging. The secondary packaging puts several primary packaged products in a box, each box has one or more labels To identify the content. A type of contact lens known as η spherical contact lens is designed to perform spherical optical correction to compensate for nearsightedness or farsightedness. This contact lens is also designed with matching parameters, especially the lens diameter and effective base curve. Therefore, spherical contact lenses The parameters of glasses usually include three parameters: spherical correction, lens diameter and bottom curve. Taking hydrogel lenses as an example, manufacturers will have a series of spherical hydrogel contact lenses. Each series of lenses has general matching parameters and provides 0.25 or 0.5 increased optical correction capability.

200525204 V. Description of the invention (2) In addition to spherical lenses, there is also a kind of lenses commonly known as "astigmatism contact lenses". That is, contact lenses have an astigmatism zone designed to correct the abnormal refractive index of the eye and the disorder. The astigmatism area provides a cylindrical correction capability to compensate for chaos: the astigmatism surface can be formed behind the lens (the rear surface of the astigmatism lens) or the shovel surface (the surface of Zhengguang | brother film). Since spherical contact lenses will rotate freely with Gemetsu, astigmatism contact lenses have various fixed points to avoid lens f, and the rotation of the eyes allows the cylindrical axis of the astigmatism zone to be aligned with the disordered vision axis. For example, some of the surrounding parts of the film will be thicker (or thinner) than others to form fixed points. There is a specific relationship (or deviation) between the cylindrical axis of the astigmatism contact lens and the fixed point Z Γ of the produced astigmatism contact lens. This deviation relationship is expressed by the deviation angle between the L 5 point direction axis of the circle; astigmatism contact lens will define This deviation angle, the general astigmatism lens will be 0. Products in the range of to every 5 or 10 degrees. From the reflection of Fang ^ Straight vision that must be visually corrected is usually accompanied by other abnormal + rate 'such as nearsightedness or farsightedness, so the specifications of astigmatism contact lenses, in addition to the spherical t capability and axial deviation of the lens, will also include The above-mentioned spherical contact lens specifications must now! ^ Positive power and matching parameters. Therefore, the positive # + of general astigmatism contact lenses: the definition of spherical correction capability, lens diameter, bottom curve, and cylindrical calibration must all refer to deviations. Therefore, lens manufacturers for each type of correction lens actually = Y, ~ series 3 6 kinds of lenses with different spherical correction capabilities. However M] may not require so many lens specifications. SKU's lens 4-point contact lens production and packaging line can only produce one at a time. All lenses have specific and identical optical characteristics. For example, the lenses have a +1 spherical correction capability. Therefore, only a large number

200525204 V. Description of invention (3) Production of a limited number of SKUs. To change the production of different SKUs, the production line must be emptied and the strategy changed. However, changing the mold in such a system can seriously affect the productivity of the equipment. EP-A-1052084 discloses a small and multiple SKU production method that can manufacture many different SKUs without stopping and emptying the production line, and can avoid the interaction pollution of different SKUs. The patent proposes a way to track the SKUs of multiple eye devices in a production line, including the steps of: combining at least one of the first mold devices, the first mold device having an identification device; reading the at least one first mold device, the Identification device;-', using the first mold device to form a first molded part; providing a plurality of carriers, the carrier having a carrier index; transmitting the first molded part to at least one of the plurality of carriers; reading The carrier index of the at least one of the plurality of carriers carrying the first moulded part; and storing information related to the at least one identification device of the first mould device and the information relating to the carrying of the first moulded part Vehicle indicator data is stored in memory accessible by the device. At the same time, equipment implementing the method is disclosed. The proposed system can track multiple SKUs, mainly by carrying the mold device on a carrier and passing through the production line. However, sometimes this is not desirable because the conveyor system can transfer the combined molds individually between manufacturing stations. Moreover, in the case of astigmatism lenses, the same mold group can produce lenses having different spherical correction capabilities but the same correction capability. Therefore, identifying only the complete set of mold sets does not provide complete information about the entire specification, it is also necessary to know the direction of each mold relative to each other.

200525204 V. Description of the invention (4) [The present invention is to understand a contact lens a) mold b) provide c) inspection d) transmission e) read f) store the lens in the production line of the present invention without the need for transmission With the mold device to determine the lens products will continue to flow into the lens is easy to check the mirror method to determine the relevant information. If the database will enter and confirm the action, there will be two contents] In order to solve the above problem, the method according to the present invention includes the steps: all the multiple contact lenses are tracked in the production line, and multiple carriers each have One carrier, each contact lens determines the relevant specifications :, the parent lens to the carrier, step d) the carrier index of the carrier and the information device of the carrier index of step (e) carrier What is the access method? The method of contact lens after molding and the method of associating the injury of the carrier with the lens depend on the identity of the mold device to identify the ^ k clothing related vehicles. The lens is chased and no quality decision is required. Its specifications and information are not too ambitious: shape: the inspection station of the lens can produce peaks. A second spoon is too found to have defective lenses, but not produced. Therefore, another lens inspection and inspection after demolding. The information that can be used before the grid can be provided-a reliable way to find $ 0f / 疋 another-the beginning. With the lens specifications and stored in the production materials, the fruit is found compared with the previous one; Check the SKU of a specific y 4 疋 mesh W While the production of NO establish security and next ⑽ a = "and the system will allow the system bismuth S eve ... mesh sheet 5 was confirmed to be the beginning of a new SKU. No Page 10 200525204 V. Description of the invention (5) Lenses that meet the requirements will be eliminated. This system ensures that lenses from two different SKUs will not be placed on the same carrier. This system can transfer more than one empty vehicle in the production line as identification of the end of one SKU and the beginning of another when the SKU changes. The lens inspection system can measure the optical parameters or reading indicators of contact lenses and / or measure the identifiable marks on the lenses. For example, the inspection includes identifying the optical correction of the lens by a first identification mark on the rear surface of the lens and a second identification mark different from the first mark on the front surface of the lens; setting an optical correction value to the first and second marks. Combinations So each special combination of the first and second marks will be set to a specific optical correction value, and save the set combination and optical correction value in the database, read the first and second marks and compare the first The combination of the readings of the first and second labels with the labels in the database and setting the optical correction value determine the optical correction of the lens. In astigmatism lenses having a cylindrical axis astigmatism region and a fixed point axis fixed point, a third identification mark aligned on the lens surface and the cylindrical axis, a fourth identification mark aligned on the lens surface and the fixed point axis, and a third identification mark are used. And the fourth label to determine the offset between the cylindrical axis and the fixed point axis. An example of a lens with such an identification mark is disclosed in EP-B-9 75 0 7 0. The production process of contact lenses is controlled by the computer of the production line. The computer has a detailed database of parent SKUs against each batch of the same lenses, that is, with the same correction capabilities and values for the cylindrical axis. Different SKUs have different correction capabilities and combinations of cylinder axis values. Therefore, different front or back molds or molds with different orientations must be used or different reaction mixtures must be used in the molds. When manufacturing SKUs, the operator must first use a computer to determine the body of the SKU.

200525204 Five copies, description of invention (6) (batch number), number of lenses produced ~ π Voltam knows the direction of the impulse and the reaction mixture used. The mold container and the reaction mixture, ^ rr π, AW Α Dan Shao, 乂 // 总 眭, ^ ^ For the front and rear molds used, the mold must be used such as a bar code or similar identification device, It is scanned by the machine operator and checked interactively by a computer database to ensure correctness. The mold is generally made of plastic such as polypropylene, polystyrene, or polystyrene, because the optical surface is harmed during the molding process, so this time. A front mold with a concave surface is usually formed with a low profile. Some molds usually only produce lenses. ^ Dan is named on the concave surface of the horizontal plane and applies a certain amount of lens reactive material into the mold. A rear mold with a convex optical surface is located on the front mold, and a lens-shaped cavity is defined by the opposite optical mold surface. Apply a sufficient amount of monomer to allow the monomer to & overflow slightly from the back mold to ensure that the cavity is filled to the periphery of the lens edge. When the rear mold is completely placed in the front mold part, the excess monomer will flow out of the cavity radially. When the stone is changed, the extra part will form a ring, which is usually called a monomer ring. 'It is an important parameter for the relative orientation of the back and front of the film. 、 状 尤 々 The already assembled mold units will be hardened, and will reduce the number of points and let the Pang # in the plate hole be aggregated. Typical contact lens hardening method: White TM4 TM7 Ding early M Kaiyan Hard hardening before or after mold assembly. on. The carrier can transport the mold to the next place. If two molds are placed on a carrier, the labeling method of taking and storing is used to identify the%. The combat weapon has a computer saying, however, the vehicle can also be used in the transportation system, u manufacturing stations. In order to transport only one mold to the next-once the hardening is completed, the rear mold and the front block are eight pieces. The mold release step cuts the mold < 5 to release the damage to the lens surface lens formed therein. In the preferred implementation, the knot ’is not caused in the mold’ when the lens is released.

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V. Description of the invention (7) The concavity style maintained at the front. The production line can be faced and the burr of the ring lens is removed in the rear mold section. The removal station can be used to remove the burr of the lens from the front mold part by using the removal station. Therefore, when the mold releases the burr of the lens from the upper part of the mold part to maintain a dry and hard state. After the lens is still stuck to the surface of the concave mold And the picking mechanism can be used to remove the Η steps easily. At this stage of the manufacturing process, one can determine the information related to its specifications. Take the head and 5; and check the combined device Including a vacuum pick-up with a vacuum source: two: the source can be used in the same way as the optical fiber to perform a full r in the lens: ϊ ΐ ί shot on the other side of the lens. In this way, there is no defect in the lens == A clear contrast will appear. Conversely, = Medium: Defects or markings will cause internally reflected light to be scattered and emitted from the lens surface. Therefore, the location of the defects or markings will show a high contrast in the image detector. The device is composed of a CCD camera. The camera and related software can detect defects on the lens and related information about the rules. The camera can read the mold formed in the lens For example, the system can read the identification marks of the front and rear molds, measure the lens axis and astigmatism angle. The data will be compared with the computer database to confirm that the SKlJ of the lens is consistent. Also, if the lens cannot be picked up by the inspection test The mechanism will remove it with a thimble. If the lens passes the inspection test, the pickup mechanism will place the lens on the carrier. The carrier has a readable carrier index and data related to the lens specifications, and the data related to the carrier index is stored in the computer Therefore, the next manufacturing station can track the lens by using the indicator of the detective gear. The indicator of the vehicle can be represented by a unique number, barcode or wireless crystal. Page 13 200525204 V. Description of the invention (8) The chip code, etc. After inspection station After that, it will be processed according to the lens and hydration station. The lenses will be cleaned and / or cleaned in different cleaning styles, such as 16, 32, etc. Each lens uses: [:! Can carry multiple lenses pure water for hydration until Extend to full scale = 7 wash. If it is a hydrogel lens, clean the lens by adding clean water. The lens production, ..., and water will be discharged from the cleaning tank and add water. Step. Preferably each row may be subjected to several ^ = water drainage and washing tank. Battle each Xiao also confirm whether the lens through hydration and lens cleaning

So it is part of the packaging or the mirror is carried to the packaging station. The carrier itself is a blister or other lens container. One day the carrier is transported to a packaging container, such as a 5 x 3 array of blister boxes. Each shovel lens usually contains multiple lenses. The longer lenses are packaged individually. Brother has his own container. When in use, the N-vehicle index is used to track the SKU's weight in the final packaged container or blister lens. 8. If the lens is transmitted from the carrier to the carrier, for example, when the carrier enters the processing station: f is monitored by the index of the carrier. Provide the required information to print the label directly, and use the identity to start the computer. Normally, each of the six _ a: sealed in the seal of the company, blister box or container. f ^ $ 合 historian f. The sealing tape sealed to the foam box with a seal around the blister box or container includes a layer of metal pig on a polypropylene box. In the past, before or after the seizure, the sealing tape can be laser-etched. After the sealing is completed, a printed label is attached to the sealing tape. The information printed on the seal or label can be used by the end user for subsequent packaging operations or as identification data such as bar codes and matrix codes that can be read by the machine. The label will provide enough information for each lens in the blister or container to

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V. Description of the invention (9) Identify its specifications and SKU, if so, you can set a place-plus you u can return to the computer database. Min consistency. Prepare the product 1 into the blister or container after inspection, and then seal the product to each blister or container. Seal the blister box or the cuff box, especially β 4 and make sure that the film is not stored. Di Pshou a # Feiheyi will check whether it is sealed and leaked. = The wrapped lenses are sent for disinfection. Put the bubble box or Qiao: on the disinfection station. The vehicle index of the vehicle can be from 7 to 6,000, which is contained in the electronic record, φφ, r ~ i, and δ and the recorded data. ^ ^ Therefore, the identity of the lens and S0 can be the same as the index of the tool. The lenses of f can be stored in the warehouse and processed according to the order ... According to the order of the public dream 4 L to engage in # 丄, 卞 < 1 Ding Zhanxiang and request. V, mesh and wear "need to wear or store as a future order. [Embodiment of the invention] The present invention will be explained with reference to the drawings as follows: Figures 1 and 2 are represented by the reference numeral 10 and have a light trace module 丨 2 With the lens inspection of the device i ± 5 fetching device ^ τπ shirt image manipulation can refer to the hidden t ^, bang, discuss in detail, the lens inspection system W Π S, /, heart 6 marks or defects (hereinafter collectively referred to as & quot The mark / f should be noted that the 11 mark used here includes the 鳇: mark of the lens during the inspection, whether it is intentional or not. The mark deliberately placed includes astigmatism or rotation mark, inverted indicator, manufacturer's identification mark的 The preferred structure of the stupid inspection system parts includes the light source module 12 vertically located above the Yingtian clothing set 14 (that is, * CCD camera) as shown in Fig. 1, but other, zero & S & placement method. The basic operation of the inspection system 丨 〇 includes: (1) Pick up the lens 16 with 'port a, such as the vacuum head 18;

Page 15 200525204 V. Description of the invention (10) (2) Place the lens 16 into the light source module 12 with the pickup head 18 and (3) Activate the light source in the light source module 12 to shine the imaging device on the lens. . Yang Xiu's explanation is as follows. The signs and defects in the lens are in the imaging device 14: Zhixian appears. A computer (not shown) can be used to inspect and assemble 1 0 The mark read by the lens and compare the standard calculated by the measured image data accepted by the imaging device according to a specific threshold value. As shown in FIG. 2, the light source module 12 is generally defined by a ring structure having upper, middle, and lower aperture regions 2 0 2 2 and 24, respectively, to define the central opening 2 &. The upper and middle aperture areas 20 and 22 are spaced from each other to define the upper light structure aperture 26, while the middle and lower aperture areas are spaced from each other to define the lower light structure aperture 28, and the upper and lower light structure apertures 26 and 28 extend to the central opening 25 The whole 3 6 0. . It must be noted that depending on the intensity of the light source used, if only the glazing structure aperture 2 6 is sufficient to inspect the lens 16, the glazing structure aperture 2 8 may not be needed. As shown in Figure 2 ', the facing surfaces 20a and 22 of the aperture areas 20a and 22a have a series of parallel grooves, respectively, to eliminate light rays that are not at the correct lens inspection angle. This section is discussed later. Similarly, the facing surfaces 22b and 24a of the middle and lower aperture regions 24 and 26 have the same parallel grooves, respectively, so as to eliminate light rays that are not at the correct lens inspection angle. Although not shown in the second figure, the inner cylindrical walls 2 2 c, 2 4 c, and 2 6 c of the “upper” and lower aperture regions have surface structures that can eliminate these surface glare, respectively. The upper and lower light structures The individual functionalities of the apertures 26 and 28 are further discussed below. Next, first discuss the function of the glazing structure aperture 26. The light source may be provided around the upper and middle aperture areas 20 and 22 around 36. Ring light, the upper aperture 26 is used to guide the light into the central opening 25. In the embodiment of Figures 1 and 2, the light source is

200525204 V. Description of the invention (π) Multiple circularly spaced LEDs 3 0U are arranged on the outer ring 32 of the upper aperture 26 ′ but any suitable light source can also be used. Other suitable light sources include fluorescent lamps and 360 ° fiber optic lamps. There is a diffuser 34 between the LEI 30U and the glazing structure aperture 26 to diffuse the light C or other light source emitted by the LED through the aperture 2 6 and enter the central opening 25 before uniformly diffusing. The embodiment of the light diffuser 32 in Figs. 1 and 2 is ring-shaped, but it may be other forms. The material of the light diffuser 32 may be made of transparent plastic such as acrylic. The film can be sucked by the pick-up head 18 which will generate a vacuum V ". A soft O-ring 19 can be used on the pick-up head 18 to avoid damage to the lens 16 caused by the contact end with the lens. Pick-up head 18 When picking up the lens 16 it is best to contact the concave surface of the lens 16a to put it in the central opening 25. It is best to maintain the concave surface up. Picking up the gorge 18 along the vertical axis xx (picture 1) in the first picture Move between the position and the lowered position in Figure 2. Therefore, the pickup head 8 lowers the lens 16 into the central opening 25 of the light source module 12 and places it in the inspection position as shown in Figures 2 and 8a. When located at the "inspection position", the outer edge and surrounding edge 16c of the lens 16 will be located at the path of the incident light of the glazing structure aperture 26. When the lens 16 is placed at the above-mentioned inspection position, the light source will be activated in the above manner Structure light is irradiated through the aperture 26. When the structure illuminates the outer edge of the lens 16 6c, the lens will have the same phenomenon as the optical fiber, that is, light is illuminated by the aperture 2 6 and enters the periphery of the lens 16 and is on the convex and concave lens surfaces Internal 4 reflection between 16a and 16b and finally incident by light Ejected from the edge of the lens on one side. The facing surfaces 2a and 2a of the upper and middle aperture areas 20 and 22, respectively, are tilted downward so that the direction of light can reach the contact lens in the direction of curvature of the lens. Edge 1 6c.

Page 17 200525204 5 Description of the invention (12) In a preferred embodiment, the tilt angle is between 10 ° and 50 °. The light passing through the aperture 26 at the angle of the trip is called "structured light". Not between. Therefore, the flat line will be blocked by the structure of the aperture blocking surfaces 20a and 22a. The working principle of the light at an angle is the same as that of the optical fiber. If there is no indication, when light enters the edge of the lens 16c, because the thickness of the lens material or the difference between the density of the lens is very large, refraction will occur. Because the angle with the surrounding air material exceeds the total reflection angle, Therefore, the refraction will diffract the line and the lens surface, and the lens surface will diffract and penetrate into the surrounding air. 弁 2 ^ Free light from the material of the contact lens. Light will be reflected back to the invisible shot on the lens surface. The reflection angle is equal to The angle of incidence. The light reflected back and forth between the front two of the contact lens == anti 1 6b will be finally shown in another table 6a and 6). On this day, the camera 14 cannot see the light. The area shows a dark area in the image. There is a mirror in the open position) ^ The display shows a dark area, but the periphery of the lens 16c is redundant. Because the edge of the lens 16 is at the edge of the camera 14 Direction caused Reflection and refraction. Because of the difference in density between Lu and Wu caused by the marking reflective surface, if the lens has a C lens material that is not the same as the marking person, or a defect, the internal reflection of the light is caused by the defect / The marked point emits the lens. Therefore, the marked area of the lens will show bright points F @ 1-dark areas in the imaging device 14. The // defective / amplified domain of 7F shows the inspection method of this lens image. In the conventional method of directly passing light through the concave surface of the lens, the light is better in the area where the lens is not oblique to the area where the lens is marked than the inspection method used to the convex surface. Brother

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V. Description of the invention (13) ^ No area will block light and the light is too strong. Because of &, many marking benefits "::; it is difficult to get through the marked area without lens. One shot ^^^ by shirt image The device found that the reading of the label would be turned off and waited until the next lens% special inspection = image "14. After inspection, when the light source is needed between the light sources, it can be placed on the stomach. If the lens is tested as described above, only two: U = n However, because the pick-up head is located at 钤 ^ Q26, it is enough to inspect the lens; however, when the lens is blocked to make this middle / in / in the area within the ring 19, check the above optical structure aperture 26: Exact presentation. This light structure has an aperture of 28. The battle of the image of a brother can be opened immediately. In particular, the lens is above 16 and the light circumference is 9.

shut down. After centering the convex surface of the lens 16b, open the upper LED array 30U and lower the LED array 30L to let light pass through the sigma structure aperture 28. If it is hit, the pickup head 18 can be at 2:; 34 :: iris 28. Set to the correct position if necessary. Middle and lower light: 5 Medium weight: Adjust the position and place the lens ^^^^^^! 6bΛ Λ / 22b " σ24α ^^ ^ lens, the lens in this area will be displayed on the convex / face; ^ Photo free 0 ring 19内 邈 洗 卜 # 园 9 β 私 拉 wa, 丁 在 ~ like table set 1 4 on. The obtained image is taken into account 8.0. The image is ordered by the computer (not shown) of the inspection system 10 = Xia provides information based on the image data of the upper and lower apertures. "At the time of fine work, 'the pick-up heads 18, which can pick up the lens 16, can be placed in the moving carrier; i ί two, for example, three pick-up heads can be used, so when the pick-up head is taken out, the second lens can be To the camera and the third to f ^ ^ to the vehicle. After manipulating the image and inspecting the lens 16, move the load and "... move to the next station to release the vacuum and the lens 16 to individual positions

Page 19 200525204 V. Description of the invention (14) One step (such as cooperation, drainage, packaging, etc.). Fig. 2 is an enlarged view of the camera of Fig. 1. The lenses in this example are astigmatic lenses with the following designations. The fixed point alignment mark 150 is a set of three uniformly spaced radial lines along the lens edge 30 °. These markings are molded on the convex surface of the lens and engraved on the front mold. The actual height of each mark is 1. 10mm, and the line width is 0.150 in m. The line defines the direction of the fixed point from the center of the lens through the center of the center registration mark.

The astigmatism registration mark 1 5 is a radial line along the edge of the lens. The fixed point registration mark is located at 6: 0, and the astigmatism registration mark can be anywhere from 9: 0 to 3: 0 0 on the half of the clock face. This mark is molded on the concave surface of the lens, with an actual height of 1.1 Omni, a line width of 0.15 Omm, and etching on the back fixture. The line defines the astigmatism axis from the center of the lens (horizontal) through the center of the registration mark. The previous mold sequence designation 160 is a series of two alpha numbers molded on the convex surface of the lens. This mark is also on the front mold surface. The approximate height of the number is 0.75 mm, and it lies within 15 ° on both sides of the center line of the fixed point alignment mark. The designation uses the word No. 12 He e 1 v e t i c a.

The subsequent mold sequence designation 1 6 5 is a series of two numbers molded on the concave surface of the lens. The approximate height of the number is 0,7 5mm, and it lies within 15 ° counterclockwise of the astigmatism registration mark. The marking also uses the word No. 12 He e 1 v e t i c a. The camera system records and measures these marks and compares them to the specifications of the lens with computer data. The camera will also detect any defects such as water marks, stains, and other molding defects. Inspect each lens and compare it with the data of a specific SKU

Page 20 200525204 V. Description of the invention (15) To confirm the consistency of 5 SKUs for lens. If the lens is correctly placed on the carrier, such as a carrier with multiple small spaces and scanning the carrier identification code, place the relevant lens on the carrier. Defective lenses are rejected. If the specifications of the lens are inconsistent with the SKU, the data of 31 (11) will be compared. If the specification is the same as the next SKU, the signal of the end of the SKU will be issued. The carrier carrying the last lens will be advanced and selected Put one or more empty carriers as the difference between SKUs. Then, the first lens of the new SKU will be placed in the carrier and the carrier index will be scanned to place the relevant lenses into the carrier. In order to avoid misjudging the lenses The end signal of the SKU is issued. Before the end of the SKU is sent, the inspection system can be controlled to continuously inspect the number of lenses with the same specification and the next SKU. The inspection system will ensure that only the lenses of the same specification will be placed on the same carrier and can be avoided Cross-contamination. The same front and back molds can produce a series of astigmatism lenses with different astigmatism angles and different lens specifications. Therefore, each time using the same front and back molds " process batch " produced according to each other's The astigmatism angle is divided into different batches. The astigmatism angles of these different batches usually differ by at least 30 in order. This difference can ensure that these The batches will not be mixed with each other. However, the accuracy of the test and the system can correctly discriminate the continuous phase difference. 0. The lens with the A-phase astigmatism angle correction ability and therefore does not have to be worse than 30. However, the second type has: Consecutive different batches or SKU lenses must control the inspection system to detect several consecutive lenses, such as a difference in astigmatism angle of 10. or 20. However, lenses with the same specifications in order to signal the end of the SKU and the start of the next SKU. In addition to the specifications, the lens inspection system It is also possible to perform lenses with special specifications and compare with ^ -related information. Use combined information to issue SKU end and next

Page 21 200525204 V. Description of the invention (16) The signal of the start of SKU. This method allows continuous SKUs with the same lens specifications. ❿ 1111 Page 22 200525204 Brief description of the diagram. The first diagram is a perspective view of the inspection assembly of the present invention. Some light source modules are omitted for the sake of clarity. Perspective view (light source module not shown in Figure 1 is shown in Figure 2); Figure 3 is an enlarged view of the contact lens part in the inspection system. In the formula, the component names and symbols 10: lens inspection system 12: light source module 14: image capture device 16: contact lens (lens) 16a, 16b: lens 1 6c: outer edge 18 pickup head 19 0-shaped ring 20 on In the aperture area 22, the aperture areas 20a, 22a, 22b, 24a: the surface 22c, 24c, 26c: the inner cylindrical wall 24, the lower aperture area 25, the central opening V 26, the upper structure aperture 2 8, the lower structure aperture 30L: the lower LED array

200525204 Brief description of the drawing 30U: Upper LED array 3 2: Outer ring 3 4: Diffuser 3 2: Light diffuser 1 5 0: Fixed point registration mark 1 5 5: Astigmatism registration mark 1 6 0: Front mold sequence Marking 1 6 5: Marking of mold sequence behind

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Claims (1)

200525204__ VI. Patent application scope 1. A method for tracking multiple contact lens SKUs in a production line, including the following steps: a) molding multiple contact lenses, b) providing multiple carriers each having a carrier index, c) inspecting each Each contact lens determines the specifications related to it, d) transmitting each lens to the vehicle, e) reading the vehicle index of step d) the vehicle and f) storing the data related to the vehicle index of step (e) the vehicle The data and data related to the lens of step (c) are stored in an accessible memory device. 2. A method for pursuing multiple SKUs as described in item 1 of the scope of the patent application, in which a mark indicating a lens specification is molded when the contact lens clock reads the identification mark during inspection and does not determine the material related to the lens specification. 3. — A method such as the first or second item of the patent application, where the structured light is inspected 360 ° around the edge of the lens, so the structured light enters the periphery of the lens and reflects in the lens. When the internal reflected light hits Diffraction occurs when the lens is marked. Because the internal reflected light scatters or exits the lens from the one or more marked areas, the unmarked areas of the lens will appear dark, and one or more marked areas on the lens will appear dark. Renders bright areas. 4. A method for tracking multiple SKUs, such as item 1 or item 2 or item 3 of the patent application, in which each contact lens is inspected using a digital camera with related image processing technology. 5. —A method for tracking multiple SKUs as in any of the above patent applications, in which the data related to the lens specifications are compared with the data stored in the production database to determine whether the lenses meet the current correct specifications of the SKU. Page 25, 200525204 VI. Scope of patent application 6 · A kind of patent application scope, such as $ Jg If the information related to the lens specifications is not the best, ^ method from multiple SKUs, the next SKU related information in the database " 'Than 5 pairs of current SKU data will be produced with 7 · a method such as patent application scope No. 6 where inspection determines the lens is the next SKU = j method to track multiple SKUs, the signal from the beginning of the SKU and the lens is transmitted to the new load : The next 8 · ~ method such as the patent application scope No. 62 ° will be issued at the time of the copy, in which the inspection system can track multiple SKUs with the same specifications in the next 7 items. υ κυ before detecting the start of multiple consecutive methods, such as the scope of patent application No. 8 where the inspection system traces multiple SKUs at the beginning of the next SKU, with the same lens. ° It can detect three consecutive i-boilers and 0 kinds of methods, such as the patent application scope item 6 or 7 and I SK SKU, among which, 7 or δ or 9 The number of lenses Q, the number of lenses, the number of pairs, the number of pairs, the number of lenses and the same specifications as the production database, two inches, and the end of the SKU. Comparison of the data related to the number of u, u, or the 6th or 7th or 8th of the patent scope, j§ p _ς, method of tracking multiple SKUs, # 1, # 8, or Θ, one MU, and The towel dries between 1 SKU and 1;! 2 — at least one empty vehicle will be inserted between the two sets of weapons] combat gear and the following method, against the middle> as in any of the above patent applications _ ^ in u for additional inspection of defects. 2. If the method of SKU is as follows, if the publicity mirror is like the on-chip regulations, any patent application scope can be followed by multiple SKUs and / or inspection? : Relevant information is related to current or next-out defects, lenses will be removed by thimble. SKUs are inconsistent P. 26 200525204 6. The scope of patent application 1 4 · As mentioned above A ..., ^, How to apply for the scope of patent application # of the method of contact lens pound A < Tracking multiple SKU side I4 astigmatism contact lenses. 15 · —A method such as applying for a patent it Φ ii ^ ^ SKIi A jl ^ α ', which interferes with multiple SKUs, /, T-connected & 8111] is a divergence angle with the same correction ability at least 10%. . L. Shaped eye sharp Π Zhengxian 16 · — A method for tracking multiple s κ u as described in item 14 of the patent application, where continuous SKUs are astigmatism contact lenses with the same correction ability and the astigmatism angles are at least different 3 0 °. Page 27