KR0126795B1 - Method for assembling an object glass optical pick-up - Google Patents

Abstract

Disclosed is an assembly method of objective lens at assembling optical pick up comprising the steps of uniting the objective lens to the support wire, being inserted to the objective lens holder wound with a coil of designated number, fixing the objective lens holder, being formed from the upper step, to the objective lens holder equipment jig, laying the objective lens on the objective lens holder, being fixed on the equipment jig, and adheres to there, arriving safely the semi assembled blade assembly, being formed from the adhesion of the objective lens at the objective lens adhesion step, on the safe arrival jig, equipping the yoke on the safe landing jig and unites the wire holder of the blade assembly with the yoke and projects the wire, and verifying the location of the optical spot by the objective lens and connects the wire by regulating the length of projected wire.

Description

Objective lens assembly method at the time of optical pick-up assembly

1 is a side view of an independent blade assembly of a conventional optical pick up.

2 is a side view of a yoke of a conventional optical pick.

3 is a schematic cross-sectional view of a microscope, a moving optical system, and an optical unit used for positioning assembly of an objective lens in a conventional optical pick-up assembly.

4 is a side view of the yoke of an optical pickle according to the invention.

5 is a side view of the assembly order of the blade assembly in the semi-assembled state of the optical pick according to the present invention.

6 is a side view of a mounting jig used in assembling an optical pick according to the present invention.

7 is a side view of an arrangement of an optical unit, a moving optical system, and a microscope used for position-assembly assembly of an objective lens at the time of assembling an optical pick according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Wire 2: Magnet

3: camera 4: monitor

5: barrel 6: microscope objective lens

7: microscope 8: objective lens

9: seating jig 10: small pin

11: moving optical system 12: optical unit

21: wire 22: magnet

23: camera 24: monitor

25: barrel 26: objective lens of the microscope

27: microscope 28: objective lens

29: mounting jig 30: wire holder

31 wire holder screw 32 optical unit

33: moving optical system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an objective lens method for optical pickets, and more particularly, to a method for assembling and mounting an objective lens for assembling optical pickets so that the objective lens is aligned with the center of the optical axis.

1 is a side cross-sectional view of an independent blade assembly of a conventional optical pick up. As shown in this figure, the independent blade assembly has a structure in which the objective lens holder 88 to which the objective lens is fixed is fixed to the wire holder 77 by the wire 1.

As shown in FIG. 2, the independent blade assembly is coupled to the yoke of the structure to which the magnet 2 is attached to form the moving optical system 11 of the type shown in FIG.

FIG. 3 shows the position adjustment assembly method of the objective lens at the time of assembling a conventional optical pick as a whole. In the optical pick-up assembly, as shown in FIG. 3, the mounting jig 9 for assembling the moving optical system 11, the small pin 10 for adjusting the objective lens position, and the correct position of the objective lens to be adjusted. Microscope (7) for looking at and the optical portion 12 for emitting light necessary for this, and the like are used.

Here, the microscope 7 is composed of the microscope objective lens 6 and the barrel 5, the camera 3, and the monitor 4, which are paths, and the center of the objective lens 8 at the time of optical pick-up assembly. It is possible to confirm whether or not it exactly coincides with this optical axis.

The optical unit 12 also includes a semiconductor laser diode and lenses that emit a laser beam.

The method of assembling the objective lens 8 of the optical pick up using the above equipment is as follows.

In the movable optical system 11 formed by placing the yoke in a separate jig (not shown) and combining the independent blade assemblies, as shown in FIG. 3, the microscope 7 and the optical system are disposed in the seating jig 9. To assemble. At this time, the objective lens 8 is placed on the objective lens holder 88 and adjusted so that the center of the objective lens is centered on the optical lens with a small slender pin 10 or the like. Specifically, the position of the front lens is placed in the objective lens holder 88, and the center of the objective lens is centered at the center of the optical axis within the movable range of the gap, or the actuator and the moving optical system are assembled before the entire assembly. Move and glue the objective lens to the center of the optical axis.

As described above, in the conventional method of adjusting the objective lens position during optical pick-up assembly, the reference engineering system is set around the optical axis, and the objective lens is placed on an assembly (that is, with a predetermined gap in the objective lens holder) in the actuator assembly state except the lens. Release and move it with a pin, etc., so that the center of the objective lens coincides with the optical axis within the predetermined allowable range, so that there is a possibility of flow in terms of reliability after fixation because the objective lens moves between the objective lens holder gaps. In addition, since the assembly state of the movable portion of the optical picket is coupled in a separate jig that does not exactly match the yoke actually coupled, there is a problem that a lot of position and inclination defects occur.

The present invention was devised to solve the above problems, and minimizes the inclination and the poor position resulting from the positional relationship between the yoke and the objective lens holder generated by assembling the movable part, that is, the moving optical system in a separate jig, SUMMARY OF THE INVENTION An object of the present invention is to provide a method for adjusting the objective lens position during optical pick assembly, which eliminates the gap between the lens and the objective lens holder.

In order to achieve the above object, the method of adjusting the objective lens position during optical pick-up assembly according to the present invention includes a wire bonding step of fitting and attaching a support wire to an objective lens holder in which a predetermined number of coils are wound. And an objective lens holder fixing step of fixing the objective lens holder formed by bonding the wires in the wire bonding step to the objective lens holder mounting jig, and placing the objective lens on the objective lens hole fixed to the mounting jig. Attaching a lens to the objective lens; attaching the objective lens in the objective lens bonding step; and attaching the blade assembly to the seating jig, and mounting the blade assembly in the blade assembly mounting step. The blade while attaching the yoke to the seating jig A yoke mounting step of coupling the wire holder of the assembly to the yoke to protrude a wire, and confirming the position of the optical spool by the objective lens after completing the yoke mounting step, to the objective lens holder to which the objective lens is fixed. And adjusting the length of the connected protruding wire to connect the objective lens holder of the wire to connect the wire.

Hereinafter, a method of adjusting the position of an objective lens at the time of assembling an optical pick according to the present invention will be described with reference to the drawings.

4 is a side cross-sectional view of the yoke of the optical pickle and FIG. 5 is a semi-assembled blade assembly. As shown in FIG. 5, the semi-assembled blade assembly has a structure in which the wire 21 is soldered and connected to the objective lens holder 88 on which the objective lens 28 is fixed.

This semi-assembled blade assembly is coupled to the yoke of the magnet 22 attachment structure, as shown in FIG. 4, to form the moving optics 33, as shown in FIG.

6 is a side cross-sectional view of the mounting jig. This mounting jig is used at the time of position adjustment by the objective lens position adjustment method of the present invention.

7 shows a method for assembling the position of the objective lens during the assembly of the optical pick according to the present invention. As shown in FIG. 7, the optical pick-up assembly includes a seating jig 29 for positioning and adjusting the objective lens, a microscope 27 for checking the exact position of the objective lens to be adjusted, and light necessary for this. The emitting optical part 32 or the like is used.

Here, the microscope 27 is composed of a microscope objective lens 26, a barrel 25 serving as an optical path, a camera 23, and a monitor 24, so that the objective lens 28 is assembled at the time of optical pickup assembly. It is possible to check whether the center is exactly coincident with the optical axis.

In addition, the optical unit 32 is composed of a semiconductor laser diode and lenses for emitting a laser beam.

The method of assembling by adjusting the position of the objective lens 28 of the optical pick up using the above equipment is as follows.

1. In the moving optical system 33 formed by placing the yoke on the blade holder (objective lens holder; 88) mounting jig 29 and engaging the independent blade assembly, as shown in FIG. The scope 27 and the optical system are arranged to assemble.

2. The objective lens 28 is bonded to the objective lens holder on which the coil for objective lens winding is wound, and joined. At this time, the objective lens holder support wire 21 is welded with the objective lens driving coil by soldering.

3. Fix the objective lens holder 88 welded with the wire to the objective lens holder mounting jig 29, and then attach the objective lens 28 to the objective lens holder 88 fixed to the mounting jig 29. Put it on and glue it. Thus, the objective lens holder with the wire to which the objective lens is bonded, that is, the semi-assembled blade assembly, is seated on the mounting jig.

4. Install the yoke on the mounting jig where the blade assembly is seated. At this time, the wire holder of the blade assembly is coupled to the yoke to protrude the wire.

5. After attaching the yoke in this way, adjust the fixed position of the objective lens while pulling or pushing the protruding wire to check the position of the optical spool by the objective lens.

6. Cut the protruding wire, solder and fix it as shown in Figure 7, and then disengage the actuator assembly from the mounting jig.

As described above, the objective lens position adjusting method for assembling the optical pickup according to the present invention is first welded to the wire holder in such a manner that the objective lens is first adhered to the objective lens holder and the length of the wire attached to the objective lens holder is added or subtracted. By doing so, it is possible to minimize the positional and inclination defects of the objective lens and to eliminate the objective lens mounting gap, thereby ensuring the reliability of the product.

Claims (1)

A wire bonding step of attaching a support wire to an objective lens holder on which a predetermined number of coils are wound and bonding the object lens holder; and fixing the objective lens holder formed by bonding the wires in the wire bonding step to the objective lens holder mounting jig. A semi-assembly blade formed by attaching an objective lens to the objective lens holder, an objective lens holder fixed to the mounting jig, adhering the objective lens to the objective lens, and adhering the objective lens to the objective lens bonding step A blade assembly seating step for seating the assembly to the seating jig, and yoke for engaging the wire holder of the blade assembly to the yoke to project the wire while mounting the yoke to the seating jig in which the blade assembly seated in the blade assembly seating step Mounting step, the yoke The objective lens holder of the wire connecting the wires by adjusting the length of the projecting wire connected to the objective lens holder to which the objective lens is fixed while confirming the position of the optical spool by the objective lens after finishing the mounting step. An objective lens assembly method for assembling an optical pick-up comprising a connecting step.