TWI766252B - Optical lens manufacturing system and optical lens manufacturing method using the same - Google Patents

Abstract

An optical lens manufacturing system includes a base, a lens picker, a driving device, a displacement detector and a controller. The lens picker is disposed on the base. The driving device is disposed adjacent to the base. The displacement detector is disposed on the driving device. The controller is electrically connected to the driving device and could control the driving device to drive the base to move with a changed driving current.

Description

Optical lens manufacturing system and optical lens manufacturing method using the same

The present invention relates to a manufacturing system and a manufacturing method using the same, and more particularly, to an optical lens manufacturing system and an optical lens manufacturing method using the same.

During the assembly process of the conventional optical lens, the lens extractor usually continuously extracts the optical lens and puts it into the lens barrel. After a batch of optical lenses is assembled, check whether the assembled state of the optical lenses is correct. However, the disadvantage of such a quality inspection method is that it is found after a batch of optical lenses is assembled that the assembly is incorrect, resulting in a large amount of rework costs and/or scrapping costs. Therefore, there is a need to propose a technology for on-line real-time inspection of optical lens assembly.

The invention relates to an optical lens manufacturing system and an optical lens manufacturing method using the same. The optical lens is assembled into the lens barrel by the control of driving current, and whether the assembled state of the optical lens is correct is judged according to the movement stroke of the base. In this way, errors can be detected in real time and incorrect assembly can be prevented from continuing to occur.

An embodiment of the present invention provides an optical lens manufacturing system. The optical lens manufacturing system includes a base, a lens extractor, a driving device, a displacement detector and a controller. The lens extractor is arranged on the base. The drive device is disposed adjacent to the base. The displacement detector is arranged on the driving device. The controller is electrically connected to the driving device and can control the driving device to drive the base to move by changing a driving current. In this way, the optical lens manufacturing system can detect errors in real time and prevent incorrect assembly from continuing to occur.

An embodiment of the present invention provides an optical lens manufacturing system. The optical lens manufacturing system includes a base, a lens extractor, a driving device, a displacement detector and a controller. The lens extractor is arranged on the base. The drive device is disposed adjacent to the base. The displacement detector is arranged on the driving device. The controller is electrically connected to the driving device and can control the driving device to drive the base to move with increasing driving current. In this way, the optical lens manufacturing system can detect errors in real time and prevent incorrect assembly from continuing to occur.

Another embodiment of the present invention provides a method for manufacturing an optical lens. The optical lens manufacturing method includes the following steps. Capture an optical lens by a lens picker; drive a base to move by a driving device; detect the movement of the base by a displacement detector, and send a signal corresponding to the movement to a controller; When a driving current of the driving device driving the base reaches a preset current value, a movement stroke of the base is recorded; and the controller calculates an assembly height of the optical lens in a lens barrel according to the recorded movement stroke. In this way, the optical lens manufacturing system can detect errors in real time and prevent incorrect assembly from continuing to occur.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given and described in detail in conjunction with the accompanying drawings as follows:

Please refer to FIGS. 1 to 3. FIG. 1 shows a schematic diagram of the base 110 of the optical lens manufacturing system 100 according to an embodiment of the present invention in the starting position, and FIG. 2 shows the optical lens manufacturing system 100 of FIG. 1. Fig. 3 is a schematic diagram of the optical lens 10 contacting the lens barrel 20, and Fig. 3 is a schematic diagram of the driving current I of the controller 160 of the optical lens manufacturing system 100 of Fig. 1.

As shown in FIG. 1 , the optical lens manufacturing system 100 includes a base 110 , a lens extractor 120 , a vacuum source 130 , a driving device 140 , a displacement detector 150 and a controller 160 .

The lens extractor 120 is used for extracting the optical lens 10 . The lens extractor 120 can extract the optical lens 10 through negative pressure, and can also extract the optical lens 10 through suction cup, clamping and other techniques. Specifically, the lens extractor 120 is, for example, a suction nozzle or a collet. The vacuum source 130 can provide a negative pressure. The driving device 140 is, for example, a motor module. For example, the driving device 140 includes a servo motor 141, a lead screw 142 and a motor driver 143, wherein the motor driver 143 is used to provide a driving current to drive the main shaft of the servo motor 141 to rotate (by converting the electric energy of the driving current into the rotational torque of the main shaft), so as to The lead screw 142 is driven to rotate. The displacement detector 150 is, for example, an encoder, which can detect the rotation number of the lead screw of the servo motor. Pressure source 160 may provide pressure to drive a working fluid (eg, gas or liquid).

As shown in FIG. 1 , the base 110 is connected to the lead screw 142 to be driven by the lead screw 142 . For example, the base 110 is connected to the lead screw 142 in a way that it can translate relative to the lead screw 142 (eg, move along the assembly direction D1 in FIG. 2 ) but cannot rotate. Therefore, when the lead screw 142 rotates, the base 110 is restricted from being unable to rotate. Rotation can only translate (for example, it can only move along the assembly direction D1 shown in Figure 2). The lens extractor 120 is disposed on the base 110 . The vacuum source 130 is connected to the lens extractor 120 , and the vacuum source 130 can provide negative pressure to the lens extractor 120 , so that the lens extractor 120 can absorb the optical lens 10 . The driving device 140 is used for driving the base 110 to move along an assembly direction D1 toward the lens barrel 20 (the assembly direction D1 is shown in FIG. 2 ), so as to assemble the captured optical lens 10 into the concave portion 20r in the lens barrel 20 Inside. The displacement detector 150 is disposed in the driving device 140 for detecting the movement of the base 110 . For example, the displacement detector 150 is adjacent to the main shaft (not shown) of the servo motor 141 , can detect the rotation number of the main shaft (equal to or corresponds to the rotation number of the lead screw 142 ), and transmit the corresponding signal P1 to the motor driver 143 . The controller 160 obtains (or calculates) the number of rotations of the lead screw 142 according to the signal P1, and calculates the movement stroke of the lead screw 142 according to the number of rotations.

The controller 160 is used to: (1) obtain (or calculate) the movement stroke of the base 110 along the assembly direction D1 according to the number of turns of the lead screw 142; (2) control the driving device 140 to drive with a variable driving current I The base 110 moves along the assembly direction D1; (3). When the driving current I reaches the preset current value, record the movement stroke of the base 110; (4). Calculate the optical lens 10 on the lens barrel 20 according to the recorded movement stroke assembly height inside.

An optical lens manufacturing method may include at least the following steps: capturing the optical lens 10 by the lens capturer 120; driving the base 110 to move by the driving device 140; detecting the movement of the base 110 by the displacement detector 150, and send a signal corresponding to the movement to the controller 160; when the driving current I of the driving device 140 driving the base 110 reaches the preset current value Ic, the movement stroke of the base 110 is recorded; the controller 160, according to the recorded movement stroke, An assembly height of the optical lens 10 in the lens barrel 20 is calculated.

The following will further illustrate the optical lens manufacturing method using the optical lens manufacturing system 100 with reference to FIGS. 1 to 2 .

First, one of the lens barrels 20 on a lens barrel tray (not shown) is clamped to the work platform 30 by a clamp.

Then, the base 110 of the optical lens manufacturing system 100 shown in FIG. 1 can be moved to the top of a lens tray (not shown), and then the controller 160 controls the vacuum source 130 to provide negative pressure to the lens extractor 120 , so that the extraction port 120a of the lens extractor 120 extracts one of the optical lenses 10 on the lens tray. When the lens extractor 120 is a suction nozzle, the extraction port 120a is the suction port of the suction nozzle.

Then, as shown in FIG. 1 , the base 110 can be moved to the top of the lens barrel 20 on the working platform 30 (as shown in FIG. 1 ), and the optical lens 10 is positioned directly above the lens barrel 20 . Although not shown in the figure, the lens barrel 20 can be clamped by a holder (not shown) to be fixed relative to the working platform 30 . Then, as shown in FIG. 2 , the controller 160 controls the servo motor 141 to drive the lead screw 142 to rotate, so as to drive the base 110 to approach the concave portion 20r of the lens barrel 20 along the assembly direction D1 until the optical lens 10 contacts the bottom surface of the concave portion 20r 20b, the position of the base 110 at this time (the position where the optical lens 10 contacts the bottom surface 20b of the recess 20r) is defined as the first assembly state. The dimensional relationship between the optical lens 10 and the concave portion 20r is, for example, loose fit or transition interference fit, but the embodiment of the present invention is not limited thereto. In addition, during the process from the initial position (FIG. 1) to the first assembly state, the optical lens 10, the base 110 and the lens extractor 120 move in the assembly direction D1 as a whole without relative movement.

As shown in FIG. 3 , the curve C1 represents the relationship between the movement stroke of the base 110 and the drive current I. In the curve C1, point a represents the drive current value when the base 110 of the optical lens manufacturing system 100 shown in FIG. 1 is at the starting position, and point b represents the base 110 of the optical lens manufacturing system 100 is in the first configuration The driving current value in the state, and the point c represents the driving current value (the default current value Ic) when the base 110 of the optical lens manufacturing system 100 is in the second assembly state.

As shown in FIG. 3 , when the moving stroke of the base 110 continues to increase (eg, the base 110 is from the initial position shown in FIG. 1 (corresponding to the point a of the curve C1 ) until the base 110 is in the first assembled state (corresponding to point b of the curve C1 ), the controller 160 controls the driving device 140 to drive the base 110 to move along the assembly direction D1 with a constant driving current I (the horizontal segment from point a to point b of the curve C1 ).

When the moving stroke of the base 110 no longer increases, the controller 160 controls the driving device 140 to continuously increase the driving current I to a predetermined current value Ic. For example, when the base 110 is blocked by the concave portion 20r in the lens barrel 20 and cannot continue to move forward in the assembly direction D1 , the controller 160 controls the driving device 140 to continuously increase the driving current I to increase the force applied to the base 110 . In one embodiment, the driving device 140 can control the driving current I to linearly or non-linearly increase to the preset current value Ic.

S ，此移動行程

S例如是基座110從起始位置至第二組配狀態的移動行程。在第一組配狀態至第二組配狀態的過程中，驅動電流I持續地增加，使基座110持續將光學鏡片10壓入鏡筒20的凹部20r內，因而可增加光學鏡片10正確組配至鏡筒20之凹部20r內的機率。詳言之，在第一組配狀態，若光學鏡片10在凹部20r內的姿態尚未正確(如斜擺，原因可能是凹部20r的側壁有雜質)，由於基座110持續對光學鏡片10施力，因此可將姿態尚未正確的光學鏡片10往凹部20r內壓迫，強迫將光學鏡片10調整至正確姿態(如第2圖所示之平擺)。本發明實施例不限定預設電流值Ic的數值，其可視光學鏡片10的特性(如形狀、尺寸、重量等)、鏡筒20的特性(如形狀、尺寸、重量等)及光學鏡片10與鏡筒20的配置關係(如餘隙量等)而定。Then, when the driving current I reaches the preset current value Ic, the controller 160 records the movement stroke of the base 110

S , this moving stroke

S is, for example, the movement stroke of the base 110 from the initial position to the second assembled state. During the process from the first assembly state to the second assembly state, the driving current I continues to increase, so that the base 110 continues to press the optical lens 10 into the concave portion 20r of the lens barrel 20 , so that the correct assembly of the optical lens 10 can be increased. The probability of fitting into the concave portion 20r of the lens barrel 20. Specifically, in the first assembly state, if the posture of the optical lens 10 in the recessed portion 20r is not correct (eg, tilted, the reason may be that there are impurities on the sidewall of the recessed portion 20r), the base 110 continues to exert force on the optical lens 10 . Therefore, the optical lens 10 whose posture is not correct can be pressed into the concave portion 20r to force the optical lens 10 to be adjusted to the correct posture (as shown in FIG. 2 , the horizontal swing). The embodiment of the present invention does not limit the value of the preset current value Ic, and the characteristics of the optical lens 10 (such as shape, size, weight, etc.), the characteristics of the lens barrel 20 (such as shape, size, weight, etc.) and the optical lens 10 and the It depends on the arrangement relationship of the lens barrel 20 (eg, the amount of clearance, etc.).

S，判斷光學鏡片10於鏡筒20內的組裝高度。Then, the controller 160 according to the recorded movement stroke

S, determine the assembly height of the optical lens 10 in the lens barrel 20 .

S與一標準移動行程，計算組裝高度。計算過程例如包括：控制器160取得所記錄之移動行程

S與標準移動行程之行程差值。當行程差值落於設定範圍內時，表示組裝正確，光學鏡頭製造系統100繼續製作下一個光學鏡頭成品。前述的「正確組裝」例如是包含：光學鏡片10的厚度t1 (厚度t1繪示於第2圖)符合標準鏡片且/或光學鏡片10與鏡筒20的相對位置符合組裝規格。然，當行程差值落於設定範圍之外，表示組裝錯誤，控制器160據以輸出警告訊號S1。The following describes one embodiment of the present invention for calculating the assembly height. The controller 160 is further used for: according to the recorded movement stroke

S and a standard travel stroke, calculate the assembly height. The calculation process includes, for example: the controller 160 obtains the recorded travel itinerary

The stroke difference between S and the standard travel stroke. When the stroke difference falls within the set range, it means that the assembly is correct, and the optical lens manufacturing system 100 continues to manufacture the next optical lens product. The aforementioned "correct assembly" includes, for example: the thickness t1 of the optical lens 10 (the thickness t1 is shown in FIG. 2 ) conforms to the standard lens and/or the relative position of the optical lens 10 and the lens barrel 20 conforms to the assembly specification. Of course, when the stroke difference is out of the set range, it indicates an assembly error, and the controller 160 outputs a warning signal S1 accordingly.

When the assembly is wrong, the optical lens manufacturing system 100 can take measures to prevent the assembly from continuing to occur, so as to prevent the wrong assembly from continuing to occur. For example, in one embodiment, the optical lens manufacturing system 100 further includes an indicator (not shown). When the assembly is wrong, the controller 160 can send a warning signal S1 to the indicator, and the indicator is used to send out an indicator signal to warn the operator, and the operator can suspend the operation of the production line accordingly. In addition, the indicator is, for example, a sound generator, a vibrator, a light-emitting device, or the like. In another embodiment, as shown in FIG. 2 , when wrong assembly occurs, the controller 160 can send a warning signal S1 to the driving device 140 , and the driving device 140 stops operation accordingly to prevent the wrong assembly from continuing. For another example, in another embodiment, the assembled lens barrel 20 and the optical lens 10 can be moved to the next work station in the production line, such as the fixing station of the optical lens 10 and the lens barrel 20, wherein the optical lens 10 and the lens are The fixing method of the cartridge 20 is, for example, glue dispensing or hot melting. Then, the fixed optical lens 10 and the lens barrel 20 (called finished optical lens) can be collected into a finished material tray (not shown). After that, the controller 160 can additionally clamp the finished optical lens product corresponding to the warning signal S1 in the finished product tray (ie, the finished optical lens product with wrong assembly) to an unqualified tray, so that the finished optical lens products remaining in the finished product tray are all is the finished product assembled correctly.

In one embodiment, a standard lens (not shown) and the lens barrel 20 may be assembled in advance using the same or similar method as described above, so as to obtain a movement stroke corresponding to the standard lens (referred to as "standard movement stroke"). The optical lens manufacturing system 100 further includes a memory 170. The memory 170 can store the aforementioned at least one set of standard moving strokes, wherein different standard moving strokes correspond to different optical lens thicknesses, lens barrel sizes, and/or assembly specifications. In an embodiment, the memory 170 may be disposed in the controller 160 , but may also be disposed separately from the controller 160 .

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those skilled in the art to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

S:移動行程 P1:訊號 t1:厚度100: Optical lens manufacturing system 10: Optical lens 20b: Bottom surface 20: Lens barrel 20r: Recess 110: Base 120: Lens extractor 120a: Suction port 130: Vacuum source 140: Driving device 141: Servo motor 142: Lead screw 143 : Motor driver 150 : Displacement detector 160 : Controller 170 : Memory c, b, c : Point C1 : Curve D1 : Assembly direction I : Driving current Ic : Preset current value

S: Movement stroke P1: Signal t1: Thickness

FIG. 1 is a schematic diagram of the base 110 of the optical lens manufacturing system 100 in the starting position according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating that the optical lens 10 of the optical lens manufacturing system 100 of FIG. 1 is in contact with the lens barrel 20 . FIG. 3 is a schematic diagram of the driving current I of the controller 160 of the optical lens manufacturing system of FIG. 1 .

100: Optical Lens Manufacturing System

10: Optical lenses

20b: Underside

20: Lens barrel

20r: Recess

110: Pedestal

120: Lens Extractor

120a: suction port

130: Vacuum source

140: Drive

141: Servo motor

142: Lead screw

143: Motor drive

150: Motion detector

160: Controller

170: Memory

Claims (10)

An optical lens manufacturing system, comprising: a base; a lens extractor disposed on the base; a drive device disposed adjacent to the base; a displacement detector disposed on the drive device and capable of detecting the a displacement of the base; and a controller electrically connected to the drive device and capable of controlling the drive device to change a drive current to drive the base to move, wherein the controller can be based on the displacement of the base , used to judge whether an optical lens is assembled correctly. An optical lens manufacturing system, comprising: a base; a lens extractor disposed on the base; a drive device disposed adjacent to the base; a displacement detector disposed on the drive device and capable of detecting the a displacement of the base; and a controller electrically connected to the driving device and capable of controlling the driving device to drive the base to move with an increasing driving current, wherein the controller can be used to move the base according to the displacement Determine whether an optical lens is assembled correctly. The optical lens manufacturing system according to claim 1 or 2, wherein the controller is further configured to: control the driving device to continuously increase the driving current to a predetermined current value; When the driving current reaches the preset current value, a movement stroke of the base can be recorded; and according to the recorded movement stroke, an assembly height of the optical lens in a lens barrel can be calculated. According to the optical lens manufacturing system of claim 1 or 2, the controller is further configured to: control the driving device to continuously increase the driving current to a predetermined current value; when the driving current reaches the predetermined current value, recording a movement stroke of the base; and when a stroke difference between the recorded movement stroke and a standard movement stroke falls outside a set range, a warning signal can be issued. According to the optical lens manufacturing system of claim 1, the controller is further used for: when one of the moving strokes of the base continues to increase, it can control the driving device to use the constant driving current to control the base Move in an assembly direction. According to the optical lens manufacturing system of claim 2, the controller is further configured to: control the driving device to drive the base to move with the constant driving current, and then drive the base with the increasing driving current. Seat moves. The optical lens manufacturing system according to claim 1 or 2, the controller is further used for: When the moving stroke of the base is no longer increased, the driving device can be controlled to continuously increase the driving current to a preset current value. According to the optical lens manufacturing system of claim 7, the driving device is further configured to: control the driving current to linearly increase to the preset current value. The optical lens manufacturing system of claim 1 or 2, wherein the displacement detector can detect the movement of the base, and can transmit a signal of the movement to the controller. A manufacturing method of an optical lens includes: capturing an optical lens by a lens extractor; driving a base to move by a driving device; detecting the movement of the base by a displacement detector, and sending out a pair of The signal that should be moved is in a controller, wherein the displacement detector detects a displacement of the base, and the controller can judge whether the optical lens is assembled correctly according to the displacement of the base; when the drive When a driving current of the device driving the base reaches a preset current value, a movement stroke of the base can be recorded; and the controller can calculate the movement of the optical lens in a lens barrel according to the recorded movement stroke. An assembly height.

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