JPH0450147A - Apparatus for bonding optical element having small diameter and bonding method - Google Patents

Abstract

PURPOSE:To prevent the contact of a bonding lens with worker's hand and keep the surface of the lens in clean state by placing a number of bonding lenses on a lens holder acting also as a transferring device, attaching the lens holder to an apparatus as it is and carrying out the whole bonding procedures in the state. CONSTITUTION:Bonding lenses 57, 58 are inserted into each placing hole 59 of an upper and a lower lens holders 56,63 and each holder is moved horizontally to the right or left and positioned under an adhesive applicator and a lens-suction nozzle 52. The nozzle 52 is lowered by driving a slide shaft 51 and a lens-positioning member 53 is fit to a positioning hole 60 to effect the accurate positioning of the lens. The lens 57 is lifted in a state sucked with the nozzle 52, lowered by the motion of the holder 63 and bonded to a lens 58. An adhesive nozzle 61 is lowered by the action of a cylinder 62 until the tip end is inserted into the hole 59, an adhesive is applied to the upper surface of the lens 58 and the nozzle is lifted. The holder 63 is moved below the nozzle 52 after lifting the nozzle 61.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for adhering optical elements and a method for adhering the same, and more particularly, an apparatus and method for adhering optical elements having a micro diameter (1"/,) or less. Regarding.

(Prior Art) Generally, an optical system is constructed by cementing multiple lenses in order to eliminate aberrations in the optical system, improve optical characteristics, etc. It requires a lot of skill, especially the centering of cemented lenses, which requires extremely high skill.

An example of a document that automates the joining of these optical elements is Japanese Patent Application Laid-open No. 102320/1983. The technology disclosed in this publication will be explained based on the drawings.

FIG. 8 is a side view showing the bonding device disclosed in the above publication. A lower bell spindle 3 and an upper bell spindle 4 are rotatably supported by bearings 5.6 on a machine body 1 and an arm 2 provided above the machine body 1, respectively, with their respective axes being -. 4 are provided with cup-shaped lens holders 7 and 8 facing each other. The lens holders 8 of the top bell spindle 4 are
A shaft 9 passing through the axis of the bell spindle 4 is provided downwardly at the lower end thereof, and the upper end of this shaft 9 is connected to a piston rod 11 of an air cylinder 10 fixed to the fuselage 1.
By supplying pressurized air to this cylinder 10, the upper lens holder 8 is moved up and down.

Gear 1 provided on the outer periphery of the lower bell spindle 3
2 is engaged with an idle gear 17 which is rotated from a variable speed motor 13 installed in the fuselage 1 via a speed reducer 14, a transmission mechanism 15, and a torque limiter 16, and is also provided on the outer periphery of the upper health spindle 4. The gear 18 includes a shaft 19 that rotates through the torque limiter 16, and an electromagnetic clutch 2.
0, an idle gear 22 rotated through a shaft 21 is engaged. The idle gears 17 and 22 have different numbers of axes, and the number of teeth for the lower bell spindle is 32 teeth, and the number of teeth for the upper bell spindle is r30J.
The upper and lower bell spindles 3.4 are configured to have different rotational speeds.

An air suction passage 2 is located at the axis of the lower bell spindle 3.
3 is formed, and its upper end is opened into the lower lens holder 7, and its lower end is connected to a vacuum pump 24 as a negative pressure generating device through a hose 25 connected via a rotary joint (not shown).

The mechanism 1 is provided with a support 26 that stands up with an inclination in a direction away from the lower lens holder 7. On this support 26, an adhesive is applied to the bonding surface of the lens placed on the lower lens holder 7. An adhesive supply bag 227 for dripping is provided.

The adhesive supply device 27 includes an air cylinder 2 for lifting and lowering the nozzle, which is fixed by a fixing member 28 along the pillar 26.
9, and an adhesive drip nozzle 33 attached via an arm 32 to a support member 31 coupled to a piston rod 30 of this air cylinder 29. It is connected to an adhesive tank 34 as a supply source through a hose 35, and its direction can be adjusted by a joint 36 provided in the middle of the arm 32.

The configuration of the adhesive dripping nozzle 33 is such that a valve body is operated by a built-in solenoid valve SV3, and a predetermined amount of adhesive is dripped from the tip of the nozzle 33 in the form of a drip.

The adhesive tank 34 is of a closed type and is configured to supply adhesive by air pressure that is press-fitted from the outside.

The working process of the lens bonding device in the above-mentioned prior art will be explained.

Of the pair of upper and lower lenses to be bonded, the lower lens is placed on the upper surface of the lower lens holder 7, and then the upper lens holder 8 is lowered and comes into contact with the lens to perform centering by centripetal action. After centering, the vacuum pump 24 is activated to hold the lens in the lower lens holder 7 by vacuum suction.

The adhesive dripping nozzle 33 is then activated to apply adhesive to the upper surface of the lens.

Subsequently, after manually placing the other upper lens on the upper surface of the lower lens, the upper lens holder 8 descends and contacts again, and centering is performed. In this state, the upper and lower spindles 3.
After adjusting the lens by rotating 4,
The vacuum suction was released and the shutter of the drying device (not shown) was opened. After the adhesive had hardened, the upper lens holder 8
By rising, the bonding of the upper and lower lenses is completed.

[Problem to be solved by the invention]

According to the above-mentioned publication, it is stated that by using this method of supplying the pair of lenses to the apparatus, manual labor is eliminated, and the effect thereof is described. However, it is still necessary to manually place the lens on the lower lens holder each time, so the surface of the lens to be cemented cannot be kept in a clean state.

However, in the case of a lens with an outer diameter of 1 inch or less, it is necessary to manually feed the lens to the lower holder, which still places a large burden on the operator, and this problem has not been solved yet.

The present invention has been made in view of the above-mentioned problems, and provides a bonding device and method for bonding micro-diameter optical elements, which allows an operator to attach a micro-diameter optical element without touching it, and which reduces labor. The purpose is to

[Means to solve the problem]

The concept of the present invention will be explained based on screens.

FIG. 1 is a perspective view showing essential parts of the present invention.

A shaft disposed at the center of the figure and facing in the vertical direction is a slide shaft 51 configured to be movable in the vertical direction as shown by the arrow. A lens suction nozzle 52 is connected to the lower end surface of the slide shaft 51 via a rectangular hend block 54 .

Further, a rod-shaped lens positioning member 5 is provided on the head pro 54 in parallel with the lens suction nozzle 52.
The proximal end of No. 3 is attached. In addition, the head block 54
In order to suction and hold the lens to the tip of the lens suction nozzle 52, the tip of a suction tube 55, the base end of which is attached to an external vacuum device, is connected to the side wall surface of the lens to enable suction. It is configured.

A rectangular parallelepiped-shaped lens holder 56 configured to move in the left-right direction as shown by the arrow is disposed on the tip surfaces of the lens suction nozzle 52 and the lens positioning member 53, that is, on the opposing downward sides. There is. On the upper surface of this lens holder 56, a large number of lens mounting holes 59 are bored in series and at equal intervals in order to arrange lenses 57 to be cemented.

Further, the lens holder 56 has the same number of positioning holes 59 as the lens mounting holes 59, and the positioning holes 60 are drilled at the same positions in parallel so that the lens positioning members 53 are inserted and fitted. . That is, the lens suction nozzle 52 and the lens positioning member 53 disposed on the slide shaft 51
lowers in the direction shown by the arrow, inserts and fits into the lens mounting hole 60 and the lens positioning hole of the lens holder 56, respectively, and sets the corresponding position so that it comes into contact with and attracts the upper surface of the lens 57 to be bonded by suction. It has a similar configuration.

A slide shaft 51 provided with the lens suction nozzle 52, etc.
A cylinder 62 is provided with an adhesive nozzle 61 for applying an adhesive onto the surface of the lens to be bonded and is configured to move up and down at vertical positions within the movement range of the lens holder 56 in parallel with the lens holder 56 . Further, below the adhesive nozzle 61, a lower lens holder 53, which is formed in the same shape as the upper lens holder 56 in which the lens to be bonded 58 is housed and mounted, is configured to be movable in the direction shown by the arrow. There is.

[For production]

The operation of the above configuration will be explained.

Lenses 57 and 58 to be bonded are inserted into the lens mounting holes 59 of the upper lens holder 56 and the lower lens holder 63, respectively.

The upper lens holder 56 and the lower lens holder 63 are
They are each horizontally moved to the left and positioned to a position below the adhesive applicator and a position below the lens suction nozzle 52. Subsequently, the lens suction nozzle 52 is lowered by driving the slide shaft 5X provided above one of the upper lens holders 56. As a result of this lowering, the lens positioning member 53 and the lens positioning hole 60 are fitted and inserted into each other, thereby achieving accurate positioning. That is, the lens suction nozzle 52 is inserted and fitted into the lens mounting hole 59, and the center upper surface of the lens to be bonded 57 and the center of its suction surface (tip surface) are brought into contact.

The lens suction nozzle 52 in contact with the lens to be cemented 57 is
It is attracted by the drive of an external vacuum device and rises.
It is removed from the lens mounting hole 59.

The adsorbed lens 57 to be cemented is lowered by movement of the lower lens holder 63, which will be described below, and is cemented to the lens 58 to be cemented on the lower lens holder 63.

The lens 58 to be bonded, which is housed in the lens mounting hole 59 of the lower lens holder 63 which has moved horizontally at the same time as the other upper lens holder 56, is moved downward by the drive of the syringe 62, and the adhesive nozzle 61 is lowered to the lower lens holder. 63 mounting hole 5
Insert the tip into the tube.

The inserted adhesive nozzle 61 stops on the upper surface of the lens 58 to be bonded, and after applying a predetermined amount of adhesive on the spherical surface, rises and leaves the lens mounting hole 59.

Due to the detachment, the lower lens holder 63 moves to a position below the lens suction nozzle 52 and is inserted into the lens mounting hole 59 by the insertion guide of the lens positioning member 53 into the positioning hole 60, and the lens to be bonded 58 After the lens suction nozzle 52 descends onto the adhesive applied to the upper surface of the lens and is accurately polymerized, the suction is released, the lens suction nozzle 52 ascends, and is removed from the lens mounting hole 59.

The detached lens suction nozzle 52 returns to its original position, and the upper and lower lens holders 56 and 63 also move to their original positions, and the above bonding process is repeated.

After a predetermined number of bondings have been completed, the lower lens holder 63 containing the bonded lenses is transferred to an adhesive curing device for the next step.

〔Example] Each embodiment of the present invention will be described based on the drawings.

In the drawings, the same members and structures are denoted by the same reference numerals in FIG. 1 and the drawings of each embodiment, and the explanation thereof will be given in the first drawing and the rest will be omitted.

(First embodiment) Fig. 2 shows a first embodiment of a bonding device for micro-diameter lenses according to the present invention.
It is a perspective view showing an example. 3 is a sectional view showing the lens holder and guide rail shown in FIG. 2. FIG. Second
The figure has exactly the same structure and function of the main parts as FIG. 1. Therefore, the differences will be mainly explained.

At approximately the center of the rectangular base 64, as shown in the figure, an inverted L-shaped arm is erected. A hole 66 is vertically bored in the L-shaped bent portion of the arm 65, and a bearing 67 is integrally mounted on the inner diameter of the hole 66. The slide shaft 51 shown in FIG. 1 is supported and mounted on the inner diameter of the bearing 67 so as to be movable up and down with its rotation being restricted by a ball spline or the like. At the lower end of this slide shaft 51, there is a base end of a lens suction nozzle 52,
In order to insert and fit into the positioning holes 60 on the upper surfaces of the lens holders 56 and 63, and to allow the lens suction nozzle 52 to easily and accurately insert and fit into the lens mounting hole 59, a taper is formed toward the tip. A hendlock 54 is attached to the base end of the positioning pin 53 with a predetermined gap therebetween.

Further, a stopper screw 69 for adjusting the downward movement position of the slide shaft 51 is attached to the base end of the slide shaft 51 protruding from the arm 65 via a holding member 68.

A groove (guide rail) 70 for the upper lens holder 56 and lower lens holder 63 to slide on the base 64 is formed in the longitudinal direction near the front edge of the base 64 . The guide rail 70 is precisely formed so that there is no play in the front-rear direction, that is, in the groove width, relative to the base 64.

The height (thickness) of the upper lens holder 56 and lower lens holder 63 fitted and placed in the guide rail 70 is the third
As shown in the figure, when the lens suction nozzle 52 adsorbs the lens 57 to be bonded and superimposes it on the lens 58 to be bonded, the lens 57 to be bonded is fixed so that its height (height when lowered) can be kept constant. The lower lens holder 63 is made thinner (lower) by the thickness of the lens.

The operation (process) of this embodiment having the above configuration will be explained next.

Figure 4 (A), (B), (C), (D)
, (F,), (F), and (G) are action diagrams showing the main parts of the steps of this example. In addition, (a) in the figure is
(C) shows a view from the left side of Fig. 2. (C) shows a view from the front of Fig. 2.

First, in FIG. 4(A), the lower lens holder 63 and
The upper surface (spherical surface) of the lower cemented lens 58 disposed on the upper surface
The adhesive nozzle 61 descends to apply a predetermined amount of adhesive 71. Next, the lens suction nozzle 52 is lowered downward onto the lens to be bonded 57 placed R on the lens mounting hole 59 of the upper lens holder 56 . At this time, the upper lens holder 56 may be roughly positioned.

Next, the positioning pin 53 fits into the positioning six 60 of the upper lens holder 56, so that the position of the upper cemented lens 57 is easily and accurately determined at the suction position. (Figure 4 (B)
) Note that since the positioning pin 53 is tapered toward the tip, if the upper lens holder 56 is roughly positioned, it can be smoothly inserted and fitted into the positioning hole 60.

Next, in FIG. 4(C), after the lens suction nozzle 52 comes into contact with the upper surface of the upper cemented lens 57, the vacuum device is driven to start suction, and sucks the upper cemented lens 57 into the lens mounting hole. Raise it above 59. The tip position of the lens suction nozzle 52 during suction is set in advance by a stopper screw 69.

Next, after the upper lens holder 56 slides to the right (the direction shown by the arrow shown in FIG. 4(C)), the lower lens holder 63 similarly slides to the right, and the lens suction nozzle 52 moves downward. The cemented lens 5 of the lens holder 63
The approximate position is determined on the lens mounting hole 59 of No.8.

The lens suction nozzle 52, which suction-holds the lens 57 to be welded which has been roughly positioned, and the lens mounting hole 59 of the lower lens holder 63 move downward as shown in FIG. In the same manner as described in 1., it is inserted into the lens mounting hole 59 of the lower lens holder 63, descends to the coating surface of the adhesive 71 on the lens 58 to be bonded, and is pressed and polymerized.

The lowering position of the lens suction nozzle 52 at this time is regulated by a stopper screw 69.

Further, the cemented height of the lower cemented lens 58 and the cemented lens 57, which is the sum of the upper matched lens 57, is such that the lower lens holder 63 is set in advance at the height of the upper and lower cemented lenses 57 and 58. There is.

The lens suction nozzle 52 that has bonded the lenses 57 and 58 by polymerization stops suction as shown in FIG. Lower cemented lens 5 due to the adhesive strength of M11
8 , and is separated from the lens suction nozzle 52 and detached from the lens mounting hole 59 of the lower lens holder 63 .

As the lens suction nozzle 52 rises and leaves, the upper and lower lens holders 56 and 63 slide to the left, that is, in the direction shown by the arrow in FIG. Move to the desired position and perform the operation of gluing the next lens.

Lens 58 to be cemented placed on the lower lens holder 63
After all the adhesion is completed, the lower lens holder 63 is
It is transferred to the next process via the guide rail 70. That is, the adhesive is transferred to an adhesive curing device and cured.

According to this embodiment with the above-mentioned configuration and operation, the upper and lower cemented lens holders are moved and the lens suction nozzle is moved up and down, so the entire device can be very simple and compact. Further, even when the type of cemented lens is changed, it is only necessary to adjust the lens mounting hole and height of the lens holder and the stopper screw, which is extremely effective in terms of versatility.

(Second Embodiment) FIG. 5 shows a second embodiment of the bonding device for micro-diameter lenses according to the present invention.
It is a perspective view showing an example.

As shown in FIG. 5, the slide shaft 5 is installed in a bearing 67 that is installed in a hole 66 drilled in the bent portion of the arm 65.
A rectangular holding member 6 that protrudes laterally from the base end of 1.
A screw hole is formed at the end of the ball screw 8 , and a ball screw 73 is mounted with a nut 72 .

The tip of the ball screw 73 is screwed into a screw hole provided in the arm 65. Further, a motor 74 is attached to the base end at a joint 75, and is configured to electrically move the slide shaft 51 up and down.

At a lower position of the lens suction nozzle 52 connected to the tip (lower end) of the slide shaft 51 via a head lock 54, upper and lower lens holders 56 and 63 are arranged along the longitudinal center of the upper surface of the rectangular slide table 76. It is removably installed in a groove 78 formed in the direction.

Grooves 79 and 80 are formed near both ends of the bottom of the slide table 76 in the longitudinal direction so that the slide table 76 can be slid in the left and right direction (longitudinal direction), and are fitted with two guide rails 81 and 82, respectively. It is configured.

Further, one end of a belt 83 is fixed to the longitudinal direction of the slide table 76, that is, the side wall surface on which it slides, and the other end is wound around the outer periphery of a pulley 84 attached to the rotating shaft of a lateral movement motor 85. The slide table 76 is moved in the direction shown by the arrow.

Although not shown, the configuration in which a syringe 62 equipped with an adhesive nozzle 61 is provided in parallel with the slide shaft 51 is similar to that of the first embodiment.

The steps (actions) of this embodiment with the above configuration are the same as those of the first embodiment. The different structural functions are the slide shaft 5
1, operating the ball screw 73 with a vertical motor (pulse motor) 74 to vertically move the lens suction nozzle 52;
Further, the lens holders 56 and 63 on which the lens 59 to be cemented is placed are mounted in the grooves 79.80 of the slide chief 76, and are slid in the left-right direction (longitudinal direction) by the lateral movement motor 85. Moreover, these operations are controlled by a control circuit.

According to this embodiment with the above-mentioned configuration and operation, since the vertical movement of the lens suction nozzle 52 and the height positioning of the tip (suction part) are performed by the control motor 85, it is necessary to consider the thickness of the lens to be bonded, etc. disappears. In addition, all operations such as stopper adjustment and slide table movement are automated, reducing worker fatigue.

(Third Embodiment) FIG. 6 shows the third embodiment of the bonding device for micro-diameter lenses according to the present invention.
FIG. 2 is a perspective view showing the main parts of the embodiment. This embodiment has substantially the same structure and operation as the first embodiment. Therefore, only the differences will be explained.

As shown in the figure, in this embodiment, two positioning pins 53 and 53' are provided at the tip of the slide shaft 51 to be inserted and fitted into the lens suction nozzle 52 and lens holder 56 via the head block 54. In addition, the positioning pins 53 and 53' are located below the lens suction nozzle 52.
A lens holder 56 is provided in a guide rail (groove) 70 formed in the longitudinal direction of the base 64, and a lens holder 56 is provided with a lens mounting hole 59 and positioning holes 60 and 60', respectively, at positions corresponding to the lens suction nozzle 52. The point is that they are loosely arranged.

The operation of the above configuration will be explained.

When the slide shaft 51 descends, the positioning pins 53 and 5
3' is inserted and fitted into the positioning holes 60 and 60' on the upper surface of the lens holder 56, and at the same time, the lens suction nozzle 52 is positioned and inserted into the lens mounting hole 57, and the lens suction nozzle 52 is inserted and fitted into the upper surface of the lens 57 to be bonded. When the suction device is driven, it is attracted and raised.

In this embodiment, instead of arranging a plurality of lens holders 56 as in the first and second embodiments, a single lens holder 56, that is, the same lens holder 56, is used for the suction process of the lens to be bonded and the adhesive. The coating process and the polymerization adhesion process are performed.

According to this embodiment with the above-mentioned structure and operation, since the insertion and fitting between the lens holder and the lens suction nozzle is performed using a plurality of positioning pins, there is no need to make the fitting structure with the lens holder base highly precise. Therefore, it can be moved freely in the front, rear, left and right directions, which improves fitability.

(Fourth Embodiment) FIG. 7 is a front view showing a main part of a fourth embodiment of a bonding device for a micro-diameter lens according to the present invention, and showing a part thereof in cross section.

As shown in the figure, a lens suction nozzle 52 is disposed at the tip of the slide shaft 51 via a hend block 54. A circular positioning fitting part 87 with a tapered lower edge is provided between the lens suction nozzle 52 and the head block for positioning when inserting the lens into the lens mounting hole 59 on the lens holder 56. There is.

A cemented lens mounting hole 59 formed on the upper surface of the lens holder 56 disposed below the lens suction nozzle 52 has a stepped portion formed on the inner peripheral wall, and a positioning fitting hole corresponding to the positioning fitting part 87 is formed. 89 is formed to position the lens mounting hole 59.

The effect of the above configuration will be explained.

When the slide shaft 51 descends, it is inserted and fitted into the positioning fitting part 87 and the positioning fitting hole 89 of the lens holder 59, and then descends. As the lens suction nozzle 52 descends, the tip surface (suction surface) of the lens suction nozzle 52 comes into contact with the upper surface of the cemented lens 57 and is moved upward by suction.

According to this embodiment with the above-mentioned configuration and operation, there is an advantage that the apparatus becomes compact because there is no need to provide a separate positioning member.

In each of the above embodiments, only two types of lenses were bonded, but the present invention is not limited to this, and of course can be applied to bonding of as many as three or four types.

〔Effect of the invention〕

According to the present invention with the above configuration and method, the lens holder on which a large number of lenses to be bonded are placed is mounted in the apparatus as it is,
All the processes of bonding the lenses to be bonded can be performed, and the surface of the lenses to be bonded can be kept in a clean state since the operator's hands do not touch the lenses to be bonded.

Further, since the bonding process is performed by fitting a lens suction nozzle with a highly accurate outer diameter to a highly accurate lens mounting hole provided in the lens holder, the lenses can be bonded with high precision. Furthermore, since the positioning means is provided, the lens suction nozzle can be easily and accurately inserted and fitted into the lens mounting hole of the lens holder, and has many other effects.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the concept of a small diameter lens bonding device according to the present invention. FIG. 2 shows the first part of the bonding device for micro-diameter lenses according to the present invention.
FIG. 2 is a perspective view showing an example. FIG. 3 is a sectional view showing the operating state of the lens holder and lens suction nozzle shown in the second circle. Figure 4 (A), (B), (C), (D)
, (E), (F), and (G) are front views of main parts showing the bonding process in the lens bonding device shown in FIG. 2. FIG. 5 is a perspective view showing two embodiments of the bonding device for micro-diameter lenses of the present invention. FIG. 6 is a perspective view showing the main parts of a third embodiment of the bonding device for micro-diameter lenses of the present invention. FIG. 7 is a perspective view showing the main parts of a fourth embodiment of the bonding device for micro-diameter lenses of the present invention. FIG. 8 is a sectional view showing a side surface of a conventional lens bonding device. 58... Lens to be bonded 59... Lens mounting hole 60... Positioning hole 61... Adhesive nozzle 62... Syringe 63... Lower lens holder

Claims (2)

[Claims] (1) In an optical element bonding device, there is a movable holder that stores and holds a large number of optical elements, a lens suction and movement means that is disposed above the holder and that suctions the optical elements and moves them up and down; A positioning means is provided integrally with the lens suction means to position the optical element on the holder to a bonding position, and an adhesive application means is provided in parallel with the lens suction means and moves up and down. A bonding device for micro-diameter optical elements characterized by: (2) The method for bonding optical elements includes a moving step of moving a holder housing a large number of optical elements to a position facing a lens suction nozzle, and a step of moving the lens suction nozzle downward to bond the optical elements on the holder. a suction step in which the optical element is suctioned and moved upward; an adhesive application step in which adhesive is applied to the upper surface of the optical element on the holder; and a holder containing the optical element coated with the adhesive is placed in a position facing the lens suction means. a moving step in which the upper surface of the optical element coated with the adhesive is adsorbed by the lens adsorption means, the optical element that has moved upward is moved downward to polymerize and bond, and then moved upward; A method for bonding micro-diameter optical elements, characterized by comprising a conveying process in which a holder containing a large number of elements is conveyed to the next process.