KR100491262B1 - horizontal ragulate apparatus of optical pick-up - Google Patents

Abstract

The present invention relates to an optical pick-up flatness adjusting device. In the present invention, the base is configured so that the base is positioned directly under the light irradiation unit, and the base is provided with a fixing jig having a driving module, and is mounted on the fixing jig. A reflector and a reflection jig are installed on the turntable and the optical pickup on the deck, respectively, and the flatness of the optical pickup based on the turntable is measured by simply connecting the control box and the display unit to the light irradiation unit and irradiating parallel measurement light. In addition, by implementing a flatness adjustment method for adjusting this, there is an effect that can reduce the working time and improve the work reliability.

Description

Optical ragulate apparatus of optical pick-up

The present invention relates to an optical pickup flatness adjusting device.

In general, an optical disc player using an optical disc as a recording / playing medium such as a CD player or a CD-ROM is provided with an optical pick-up for reproducing information recorded on the optical disc while moving in the radial direction of the optical disc. do.

In order for the optical disc player to accurately reproduce the information recorded on the disc, accurate horizontal movement of the optical pickup is required along with precise horizontal rotation of the turntable. Accordingly, after assembling the turntable and the optical pickup to the deck, the wobble measurement of the turntable and the flatness adjustment of the optical pickup based on the degree of wobble of the turntable are performed.

Meanwhile, the conventional optical pickup is installed on the deck together with the turntable. Such optical pickup is provided with guide holes at both ends of the pickup base on which various optical components and objective lenses are installed, and the guide holes are installed to guide the set of guide shafts formed on the deck.

In addition, the at least one guide mechanism is provided with a moving medium, and has a working structure for connecting the moving medium with an actuator provided on the deck to move the pick-up base in the radial direction of the optical disc by the pick-up moving actuator.

Accordingly, in the optical pickup flatness adjustment method having the above configuration, the degree of inclination of the guide shaft relative to the rotation surface of the turntable is inspected, and the flatness is adjusted through a tilt adjustment cam assembly installed at one end of the guide shaft according to the inspection result. Will be adjusted.

Here, the conventional tilt inspection of the guide shaft changes the position of the optical pickup in the state of irradiating the laser light of the optical pickup to the master disk rotated by the turntable, and reads the optical information reflected from the master disk, according to the read result The method of measuring the inclination of the guide shaft is applied.

Alternatively, there is a method of transporting the detection member along the guide shaft, directly transferring the transport member having an optical sensor and inspecting the inclination of the guide shaft through optical sensing between the optical sensor and the detection member. .

However, in the method of adjusting the flatness of the conventional optical pickup, the former must read the optical information reflected from the master disk and adjust the position of the guide shaft, which requires a considerable amount of working time and a high level of skill. There is a problem that can be performed only by.

On the other hand, the latter is because the detection member guided to the guide shaft and the transfer member to be transported directly above the detection member must be transferred in an accurate horizontal state, the assembly and configuration position of the detection member and the transfer member parts is made precisely If this is not done, there is a problem in that reliability cannot be obtained because accurate measurement cannot be performed, and a measurement result can be obtained through complicated calculations.

Accordingly, the present invention was made to solve the general problems of the conventional optical pickup flatness adjustment method described above,

The object of the present invention is to apply the principle of collimator (collimator), to perform the optical pickup adjustment based on the turntable through a simple operation of irradiating parallel light, thereby reducing the measurement time and In addition, to provide an optical pickup flatness adjustment device that can improve the work reliability.

As a specific means of the present invention for achieving the above object;

main body;

A light irradiation unit installed above the main body and provided with a light irradiation module for irradiating measurement light and a camera for acquiring detection light;

A base positioned below the main body and having a plurality of plates installed thereon;

A fixing jig installed on an upper portion of the base and fixing a deck on which an optical pickup to be inspected and a turntable are installed are fixed;

A driving module provided in the fixing jig to rotate the turntable;

A reflection plate seated on an upper surface of the turntable to reflect measurement light emitted from the light irradiation module;

A reflection jig seated in a direction perpendicular to the guide shaft of the optical pickup to be inspected and having a reflection mirror reflecting the measurement light emitted from the light irradiation module;

A display unit which receives the detection light reflected by the reflection disk and the reflection mirror from the camera and displays an image of the detection light on a screen; And

And an optical pickup flatness adjusting device including a control box for controlling the driving of the lamp and the camera.

In this case, the reflective jig is formed by layering the first and second jig plates in which the reflective mirror is fixed to the upper surface, and the first and second jig plates are provided with horizontal mounting pieces that are seated on the guide shaft at both ends.

In addition, a reflection hole is formed in the first jig plate at a position corresponding to the reflection mirror of the second jig plate.

In addition, the reflective jig is configured to be used independently from each other by separating the first, second, jig plate.

In addition, the fixing jig is composed of a fixed frame fixed to the upper surface of the plate, a plurality of vertical bars installed at a predetermined interval on the upper surface of the fixed frame, and a deck fixture provided at the end of the vertical bar.

In addition, the light irradiation module is installed with an inclination adjustment screw to adjust the inclination angle.

On the other hand, through the optical pickup flatness adjustment device, the step of mounting the deck on which the optical pickup and turntable to be inspected on the fixing jig; Installing a reflector on an upper surface of the turntable seated on the fixing jig; Installing a reflective jig having a reflective mirror on the guide shaft of the optical pickup; Rotating a turntable through a driving module provided in the jig; Irradiating the measurement light to the reflection mirrors of the reflecting plate and the reflecting jig in the light irradiation module of the light irradiation unit located directly above the turntable; Obtaining an image of the detection light reflected by the reflector and an image of the detection light reflected by the reflection mirror and displaying the image on the screen of the display unit; And adjusting the inclination of the guide shaft through the tilt adjustment cam assembly provided on the deck such that the detection light image of the reflector and the detection light image of the reflection mirror are coincident with each other.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration of the optical pickup flatness adjustment apparatus according to the present invention, Figure 2a is an optical pickup flatness adjustment apparatus according to the present invention, an enlarged view of the excerpts of the jig, Figure 2b according to the present invention In the optical pickup flatness adjusting apparatus, a side view showing the configuration of the jig, Figure 2c is a perspective view showing the configuration of the reflective jig in the optical pickup flatness adjusting apparatus according to the present invention, Figure 3 is an optical pickup according to the present invention In the flatness adjustment device, it is a block diagram showing the image of the detection light displayed on the display unit, Figure 4 is a block diagram for explaining the optical pickup flatness adjustment method according to the present invention.

As shown, the optical pick-up flatness adjusting device 1 of the present invention comprises a main body 2 such that the base 4 is located directly under the light irradiation unit 3, and the base 4 has a drive module. A fixing jig 5 having a 51 is provided, and a reflecting plate 85 and a reflecting jig 9 are provided on the turntable 81 and the optical pickup 82 on the deck 8 seated on the fixing jig 5, respectively. The light irradiation unit 3 is installed by connecting the control box 7 and the display unit 6.

Here, the deck 8 in which the optical pickup 82 and the turntable 81 are installed may have various shapes depending on the manufacturer, but is generally configured as a rectangular plate-like body as shown in FIG. 2A. Each corner of the deck 8 and one side of the turntable 81 is provided with an installation groove 86 for fixing to the CD player and the CD-ROM case, the turntable 81 in the center of the upper surface of the deck (8) And an optical pickup 82 are provided on the horizontal line.

As described above, the optical pickup 82 includes guide holes 822 at both ends of the pickup base 821 in which various optical parts and objective lenses are installed, and the guide holes 822 are formed on the deck 8. It is installed to be guided to a set of guide shafts 83, the at least one guide mechanism 822 is provided with a moving medium 823, and connects the moving medium 823 with the actuator 84 provided on the deck (8) It has a structure.

At this time, the optical pick-up flatness adjusting device 1 of the present invention constitutes a main body in a stand type such that the base 4 is positioned directly under the light irradiation unit 3 like a normal optical measuring device. The light irradiator 3 of the main body 2 applies a principle of a normal collimator (COLLMETOR) to place a light source having a target at the lens focus position, and transmits light passing through the light split in parallel beam flux. I) a light irradiation module 31 made of i) and a camera (CCD camera) 32 provided on the side wall of the light irradiation module 31 are provided. At this time, the light irradiation module 31 is provided with an inclination adjustment screw 311 to adjust the inclination angle.

Accordingly, the light irradiation module 31 irradiates the measurement light in the vertical direction while adjusting the inclination angle through the inclination adjustment screw 311, and the light is reflected by the object under test in the camera 32. A function of acquiring an image of a detection light that is redirected in a direction perpendicular to the split is performed.

In addition, the base 4 is divided into a plurality of inclination adjustment plate 41 as shown in Figures 1 to 2 to form a precise plane. The upper surface of each of the inclination adjustment plate 41 is formed with a screw coupling hole (not shown in the figure) in a predetermined portion, the fixing jig 5 is screwed through the screw coupling hole.

In this case, the fixing jig 5 protrudes a plurality of vertical bars 53 on the upper part of the fixing frame 52 which is screwed to the aforementioned inclination adjustment plate 41, and at the end of the vertical bar 53. The deck fixture 531 is formed.

Such vertical bars 53 are installed at positions corresponding to the two grooves of the deck 8 and the installation grooves 86 formed at one side of the turntable 81 as shown in FIGS. 2A to 2B, and the deck fixture ( 54 is fixedly installed at the tip of the vertical bar 53 to be inserted into the installation groove 86 of the deck (8) as described above.

In another case, when the structure of the deck 8 is different, the deck 8 may be seated on the upper surface of the vertical bar 53. In this case, a magnetic material (not shown in the drawing) is formed at the tip of the vertical bar 53. ) To prevent the seated deck 8 from flowing.

Accordingly, the deck 8 is seated on the fixing jig 5 by fixing the installation groove 86 formed at the corner and the installation groove 86 formed at one side of the turntable 81 to the deck fixture 54. Since the vertical bars 53 are configured to have the same length based on the design reference plane of the deck 9, the deck 9 can be accurately horizontally seated.

In addition, as a means for keeping the deck 8 continuously horizontal even when a load is generated on the upper surface of the turntable 81, a vertical bar 53 for supporting the lower surface of the turntable 81 is additionally installed. It is preferable to.

In addition, the fixing jig 5 is provided with a driving module 51 for rotating the turntable 8 to be inspected as shown in FIG. 2. The drive module 51 is a drive motor 511, a power transmission unit 512 is belt-connected to the shaft of the drive motor 511 and receives a rotational force, and one end of the power transmission unit 512 is fixed, It consists of a lever (not shown in the figure) for moving the power transmission body 512 a predetermined interval.

Accordingly, the drive module 51 drives the drive motor 511 in a state in which the power transmission body 512 is brought into close contact with a predetermined portion of the drive actuator (spindle motor) of the turntable 8 by a lever, thereby driving the turntable 81. Will rotate.

Alternatively, the turntable 8 may be rotated by directly supplying power to the drive actuator of the turntable 8.

On the other hand, the upper surface of the turntable 81 is provided with a reflecting plate 85 for reflecting the measurement light irradiated from the light irradiation unit (3) described above. Such a reflector plate 85 is configured in the same form as the optical disc so that it can be easily mounted on the turntable 8.

In addition, a reflective jig 9 is installed on the guide shaft 83 of the optical pickup 82. The reflective jig 9 is formed by stacking the first and second jig plates 91 and 92 on which the precision processed flat reflective mirror 94 is fixed to the upper surface, as shown in FIG. 2C. The two jig plates 91 and 92 are provided at both ends thereof with horizontal mounting pieces 93 mounted on the guide shaft 83.

In this case, the reflective mirror 94 'of the second jig plate 92 may reflect the measurement light emitted from the light irradiation module 31 on the first jig plate 91. The reflection hole 911 is formed through the corresponding position.

In addition, the horizontal seating piece 93 formed on the first jig plate 91 and the horizontal seating piece 93 formed on the second jig plate 92 have different lengths, and thus are formed on the guide shaft 83. When the reflective jig 9 is provided, the first and second jig plates 91 and 92 are spaced up and down at a predetermined interval without mutual interference, as shown in FIG. 2B.

Meanwhile, since the first and second jig plates 91 and 92 of the reflective jig 9 are laminated by the bolts B as shown in FIG. 2C, when the bolts B are separated as necessary, the jig plates are separated. (91,92) can be used independently.

Finally, the light irradiation unit 3 is connected to the lamp of the light irradiation module 31 and the control box 7 for driving and controlling the camera 32 and the driving module 51, the camera 32 ) Is connected to the display unit 6 to display the acquired detection light on the screen.

In this case, the reference point 61 in the form of a scale or a point is displayed on the screen of the display unit 6. The reference point 61 displays an image of a deck manufactured optimally, a turntable horizontally installed on the deck, and an image of detection light that can be obtained from an optical pickup. The degree of inclination of the wobble and the drive actuator shaft and the flatness of the guide shaft 83 of the optical pickup 82 are performed.

Thus, looking at the flatness control method through each component of the optical pickup flatness control device 1 of the present invention as described above;

As shown in FIG. 1 or FIG. 4, first, the reflector plate 85 is installed on the upper surface of the turntable 81 in the state where the deck 8 is seated through the deck installation port 54 of the vertical bar 53, and the guide shaft is installed. After the reflective jig 9 is installed in the 83, the turntable 81 is rotated through the driving module 51 provided in the fixing jig 5.

 In addition, the irradiation of the measurement light from the light irradiation module 31 of the light irradiation unit 3 through the operation of the control box (7), the reflecting plate 85 and the reflecting jig to rotate the measurement light with the turntable (8) By continuously irradiating any point of the reflecting mirrors 94 and 94 'of (9), the reflecting plate 85 and the reflecting mirrors 94 and 94' continuously reflect the irradiated measurement light.

At this time, since the measurement light is irradiated in the vertical direction of the reflecting plate 85 and the reflecting mirrors 94 and 94 'as described above, the detection light reflected from the reflecting plate 85 and the reflecting mirrors 94 and 94' is irradiated with light. The module 31 is reflected in the direction upwards.

Accordingly, the detection light reflected by the reflecting plate 85 and the reflecting mirrors 94 and 94 'is irradiated to the camera 32 at a 90 ° turn in the light split in the light irradiation module 31, and the camera 32 is irradiated. An image of this measurement light is obtained.

Subsequently, when the image acquired by the camera 32 is transmitted to the display unit 6 and displayed on the screen, the optical pickup 82 through the detection light images of the reflecting plate 85 and the reflecting mirrors 94 and 94 '. The operation is completed by adjusting the flatness of.

Here, the flatness adjustment operation of the optical pickup 82 will be described in detail;

In the image 62 of the detection light displayed on the screen of the display unit 6, the image 62 of the detection light reflected from the reflecting plate 85 rotates while the reflecting plate 85 is seated on the turntable 81, Depending on the degree of wobble of the turntable 81 is shown in the form of a point like the reference point 61, as shown in Figure 3 or in the form of such a point is rotated.

In addition, since the reflection mirrors 94 and 94 'are attached to the first jig plate 91 and the second jig plate 92, the images 63 and 63' of the detection light reflected by the reflecting jig 9 are respectively attached. As in 3, it is represented by two dots.

Accordingly, if the detection light image 62 of the reflecting plate 85 displayed on the screen is displayed in the form of a fixed point while being positioned near the reference point 61, this means that no wobble is generated on the turntable 81. . In addition, when the detection light image of the reflecting jig 63, 63 ′ is displayed to be layered with the detection light image 62 of the reflecting plate 85, the flatness of the guide shaft 83 with respect to the turntable 81 is correct. Since the coincidence coincides, the turntable 85 and the optical pickup 82 on the deck 8 seated on the fixing jig 5 can be judged as good quality.

However, in most turntables and optical pickups, the flatness does not match ideally as described above due to assembly deviation.

Accordingly, if the detection light image 62 of the reflecting plate 85 displayed on the screen is displayed in the form of a point rotating around the reference point 61, the turntable 81 generates wobble by the diameter of the circle drawn by the rotating point. It means that there is.

In addition, if the detection light image 62 of the reflector plate 85 is displayed in the form of a point that rotates while being out of the reference point, the turntable 81 may generate wobble by the diameter of the circle drawn by the point where the point of rotation turns, and This means that the actuator shaft is engaged at an angle as far as the reference point.

In this state, when the detection light images 63 and 63 'of the reflecting jig 9 displayed in the fixed point shape are deviated from the circular detection light image 62 of the reflecting plate 85 as shown in FIG. The guide shaft 83 is turned on the basis of the turntable 81.

When the guide shaft 83 is distorted as described above, the pickup base 821 of the optical pickup 82 that is horizontally moved through the guide shaft 83 also means that the horizontal axis is not accurately moved. It can't be done.

Accordingly, as shown in FIG. 3, the tilt adjustment cam assembly 87 such that the two detection light images 63 and 63 ′ of the reflection jig 9 are positioned at the center points of the circular detection light image 62 of the reflector plate 85. By adjusting the position of the guide shaft 83 up and down, it is possible to accurately adjust the flatness of the optical pickup 82.

The optical pickup flatness adjusting device and method of the present invention measure the flatness of the optical pickup 82 together with the wobble of the turntable 81 through the irradiation of the measurement light and the acquisition of the image of the detection light, and the reference to the turntable 81. The flatness of the optical pickup 82 can be adjusted.

As described above, the optical pick-up flatness adjusting device according to the present invention measures the flatness of the optical pick-up based on a turntable and adjusts the flat pick-up through simple operation of irradiating parallel measurement light, thereby shortening the measurement work time. In addition, there is an effect that can improve the work reliability.

1 is an overall configuration diagram of an optical pickup flatness adjusting apparatus according to the present invention.

Figure 2a is an enlarged view of the excerpts of the jig in the optical pickup flatness adjustment apparatus according to the present invention.

Figure 2b is a side view showing the configuration of the jig in the optical pickup flatness adjustment apparatus according to the present invention.

Figure 2c is a perspective view showing the configuration of the reflective jig in the optical pickup flatness adjustment apparatus according to the present invention.

3 is a block diagram showing an image of the detection light displayed on the display in the optical pickup flatness adjustment apparatus according to the present invention.

4 is a block diagram illustrating an optical pickup flatness adjusting method according to the present invention.

<Explanation of symbols for major parts of drawing>

1: optical pickup flatness adjusting device 2: main body

3: light irradiation part 4: base

5: fixing jig 6: display unit

7: Control Box 8: Deck

9: reflection jig 31: light irradiation module

32: camera 41: tilt plate

51: drive module 52: fixed frame

53: vertical bar 54: deck fixture

61: reference point 62: reflector detection light image

63,63 ': Reflective mirror detection light image 81: Turntable

82: optical pickup 83: guide shaft

84: optical pickup moving actuator 85: reflector

86: mounting groove 87: tilt adjustment cam assembly

91: first jig plate 92: second jig plate

93: horizontal seating 94,94 ': reflective mirror

311: inclination adjustment screw 511: drive motor 512: power carrier 821: pickup base 822: guide port 823: moving medium 911: reflection hole B: bolt

Claims (7)

A light irradiation unit having a light irradiation module for irradiating the measurement light and a camera for acquiring the detection light, a base on which a plurality of plates are installed, an optical pickup having a guide shaft and a deck provided with a turntable, a fixing jig for fixing the deck, the A reflector jig having a driving module for rotating a turntable, a reflecting plate reflecting the measurement light irradiated from the light irradiation module, and a reflecting mirror reflecting the measurement light irradiated from the light irradiation module, a control box, as well as the guide shaft. In constructing the flatness adjustment device for optical pickup including a tilt adjustment cam assembly for tilt adjustment, The display unit is connected to the camera, wherein the display unit is configured to simultaneously display the detection light image reflected by the reflector and the detection light reflected from the reflection mirror from the camera, In order to enable simultaneous display of the detection light by the display unit, the reflective jig is formed by forming a plurality of layers so as not to interfere with each other, the first and second jig plate, the reflection mirror is fixed to the upper surface, The first and second jig plates are provided with horizontal mounting pieces which are seated on the guide shaft at both ends, The first jig plate has a reflection hole formed at a position corresponding to the reflection mirror of the second jig plate, The fixing jig is a fixed frame fixed to the upper surface of the first and second jig plate, a plurality of vertical bars installed at a predetermined interval on the upper surface of the fixed frame, and deck fixture provided at the end of the vertical bar Optical pickup flatness adjustment device characterized in that the configuration. delete delete The optical pick-up flatness adjusting apparatus of claim 1, wherein the reflective jig is configured to be separately used by separating the first, second, and jig plates. delete The optical pickup flatness adjusting device of claim 1, wherein an inclination adjustment screw is installed in the light irradiation module to adjust the inclination angle. delete