KR100438569B1 - Apparatus for preventing contamination of optical head for near field recording - Google Patents

Abstract

The present invention relates to an apparatus for preventing contamination of a near field optical head, and the present invention provides a slider having a focusing hole which is supported by a suspension in a driver and penetrates in a vertical direction so as to transmit a light source, and is installed at an upper side of the focusing hole of the slider. An objective lens for refracting incident light, a focusing lens installed at a lower side of the focusing hole of the slider to focus light passing through the objective lens, and forming a spot on an upper surface of the disc, and preventing the focusing lens from being contaminated by foreign materials. Including foreign matter collecting means for collecting foreign matter around the slider as much as possible to prevent contamination of the focusing lens of the slider from foreign matter during recording / reproducing operation of the information on the disc, thereby recording / recording information using the focusing lens. The playback performance is improved.

Description

Contamination prevention device for near field optical head {APPARATUS FOR PREVENTING CONTAMINATION OF OPTICAL HEAD FOR NEAR FIELD RECORDING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical head of a high-density disk driver using near field optics, and more particularly, to an apparatus for preventing contamination of a near field optical head that collects foreign matter around the slider so that the focusing lens of the slider is prevented from being contaminated by foreign matter. .

In recent years, due to the rapid development of the network and the development of scientific civilization, it is necessary to record and retain a large amount of image information and data information, which was not previously thought, and to make a database. This is a rapidly developing situation.

For example, in the case of hard disks, the recording capacity has been increased by 60% of the recording capacity of the previous year, and even in the case of optical disc drives for computer-assisted storage devices, information storage capacity of several to tens of gigabytes is available. Have

However, such storage capacity as hard disks and optical disc drives for computer-assisted storage devices have limitations in terms of storage capacity in light of technical trends in the future.

In the case of Near Field Recording (NFR), which is emerging as a next-generation data storage device based on the above technical background, it is not only able to accommodate a large amount of data information as a future information storage device but also to live in the future. As a technology that can cope with the method sufficiently.

The near-field optical system, which realizes such near field information recording technology, overcomes the diffraction limitations of the far-field optical system applied to the optical disc by using an optical fiber or a solid-state lens (SIL). Recording and playback are possible.

1 is a schematic perspective view of a disk driver with a near field optical head of the prior art, FIG. 2 is a side cross-sectional view showing a near field optical head according to the prior art, and FIG. 3 is a near field optical head according to the prior art. Side cross-sectional view showing the process of attaching the foreign material to the focusing lens of.

Referring to FIG. 1, a disk driver showing a near field optical head according to the related art includes a drive 10 on which a disk D is seated, and a disk D installed and seated in the drive 10. Spindle motor 12 that rotates, a suspension 15 that is connected to and rotated by a voice coil motor installed in the drive 10, and a disk D that is installed at an end of the suspension 15 An optical head 20 for recording or reproducing information, and a landing plate 17 installed on one side of the drive 10 to position the optical head 20 when the disk D is not seated. It is composed.

Here, the optical head 20 is provided with two lenses in the focusing hole penetrated up and down, when the suspension 15 is rotated to the upper side of the disk (D) by the operation of the voice coil motor (aerodynamic coil) aerodynamic In the state in which it is located close to the disk D due to an injury, it plays a role of recording information on the disk D or reproducing the information recorded on the disk D.

In more detail, as shown in FIG. 2, the optical head 20 includes a slider 21 formed at a distal end of the suspension 15 by forming a focusing hole 21a in a vertical direction so that a light source is transmitted. And an objective lens 23 disposed at an upper portion of the focusing hole 21a of the slider 21 and refracting incident light, and an objective lens 23 disposed below the focusing hole 21a of the slider 21. It consists of a focusing lens 25 for converging the light passing through to form a spot on the upper surface of the disk (D).

The optical head 20 configured as described above has a disk (referred to as the incident light is largely refracted while passing through the objective lens 23 and the focusing lens 25 while the slider 21 is positioned aerodynamically on the disk D). By forming a spot below the diffraction limit on D), high density recording and reproduction can be realized.

However, in the near-field optical head as described above, FIG. 3 is rotated by the rotation of the disk D while the slider 21 travels on the disk D to perform recording / reproducing operation of the information on the disk D. As shown in FIG. 2, air into which the foreign matter 27 such as abrasion powder, dust, and the like of the disk D is mixed flows into the lower surface of the slider 21.

Accordingly, as the slider 21 travels on the disk D, foreign matter 27 in the air adheres to the surface of the focusing lens 25 of the slider 21 and contaminates the focusing lens 25. If the focusing lens 25 is contaminated in this way, the output of light through the focusing lens 25 is lowered, which causes a problem in recording / reproducing information.

In particular, since the diameter of the spot formed through the focusing lens 25 is less than the diffraction limit of light in the near-field optical system as compared to the conventional far-field optical system, the contamination of the focusing lens 25 affects the spot formation. Not only is it very large, but also because of the use of the evanescent wave (Evanescent Wave) during recording / playback, the presence of foreign matter in the path of the spot has a very bad effect on the transmission of optical energy.

That is, the near field optical head according to the related art has a focusing lens of the slider 21 while the slider 21 moves near the disk while the recording / reproducing operation of information on the disk D is performed. Since 25) is contaminated by foreign matter 27 from the disk D, a problem occurs in the formation of spots through the focusing lens 25 during recording, and an error occurs in the detection of the recording mark during playback, thereby recording information. There was a problem that a fatal defect occurred in the playback.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and during the recording / reproducing operation of the information on the disk, the focusing lens of the slider is prevented from being contaminated by foreign matter, thereby recording / recording information using the focusing lens. It is an object of the present invention to provide an apparatus for preventing contamination of a near field optical head to improve regeneration performance.

1 is a schematic perspective view of a disk driver with a near field optical head of the prior art;

2 is a side sectional view showing a near field optical head according to the prior art;

3 is a side cross-sectional view illustrating a process in which a foreign material is attached to a focusing lens of a near field optical head according to the prior art;

Figure 4 is a side cross-sectional view showing an apparatus for preventing contamination of a near field optical head according to the present invention.

<Explanation of symbols for the main parts of the drawings>

51: Suspension 53: Slider

53a: focusing hole 55: objective lens

57: focusing lens 59: dust collecting electrode

According to the present invention for achieving the above object, a slider having a focusing hole which is supported by a suspension in the driver and penetrates in a vertical direction so that a light source is transmitted, and an objective lens installed at an upper side of the focusing hole of the slider to refracted incident light. And a focusing lens provided below the focusing hole of the slider to focus light passing through the objective lens and to form a spot on the upper surface of the disk, wherein the near field optical head is installed on the slider and is electrostatically charged. There is provided an apparatus for preventing contamination of a near field optical head, characterized in that it further comprises a foreign matter collecting means comprising a dust collecting electrode for collecting foreign matters around the slider. Suspension in the driver and up and down to allow light source to pass through A slider having a focusing hole formed therethrough, an objective lens installed at an upper side of the focusing hole of the slider to refracting incident light, and a lower lens installed at a lower side of the focusing hole of the slider to focus light passing through the objective lens on the upper surface of the disc. A near-field optical head including a focusing lens forming a spot, the apparatus comprising: a foreign material collecting means comprising dust collecting electrodes installed on the suspension and electrostatically charged to collect foreign matter around the slider. An apparatus for preventing contamination of a near field optical head is provided.

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

Figure 4 is a side cross-sectional view showing an apparatus for preventing contamination of a near field optical head according to the present invention.

In the apparatus for preventing contamination of the near field optical head according to the present invention, as shown in FIG. 4, the slider 53 is provided with a focusing hole 53a which is supported by the suspension 51 in the driver and penetrates in the vertical direction so that the light source is transmitted. And an objective lens 55 provided at an upper portion of the focusing hole 53a of the slider 53 to refracting incident light, and a lower lens provided at a lower portion of the focusing hole 53a of the slider 53. Focusing lens 57 for forming a spot on the upper surface of the disk (D) while condensing the light passing through the 55, and foreign matter around the slider 53 to prevent the condensing lens 57 from being contaminated by foreign matter. It comprises a foreign matter dust collecting means for collecting dust.

Here, the foreign matter collecting means is a dust collecting electrode 59 installed on the slider 53 and charged with static electricity to collect the foreign matter around the slider 53.

According to another embodiment not shown in the drawing, the dust collecting electrode 59 may be installed in the suspension 51 instead of the slider 53.

In the apparatus for preventing contamination of the near field optical head according to the present invention configured as described above, in order to perform the recording / reproducing operation of information on the disk D, the slider 53 is discharged electrostatically while traveling on the disk D. The foreign material around the slider 53 is collected through the charged dust collecting electrode 59.

That is, while the slider 53 is traveling on the disk D, air into which the foreign matter such as abrasion powder, dust, etc. of the disk D is mixed into the surface of the slider 53 is rotated by the disk D. The foreign matter in the air is collected by the dust collecting electrode 59 and removed.

As a result, contamination of the focusing lens 57 due to the foreign matter is prevented, and the foreign matter collected by the dust collecting electrode 59 is removed by a separate dust remover after a predetermined time elapses.

In the apparatus for preventing contamination of the near field optical head according to the present invention, foreign matters around the slider 53 are collected and removed by the dust collecting electrode 59 while the slider 53 is traveling on the disk D. Therefore, the focusing lens 57 of the slider 53 is prevented from being contaminated by foreign matters, thereby improving the recording / reproducing performance of information using the focusing lens 57.

Claims (3)

delete A slider having a focusing hole, which is supported by a suspension in the driver and penetrated in the vertical direction to penetrate the light source, an objective lens installed at an upper side of the focusing hole of the slider to refracting incident light, and a lower side of the slider's focusing hole. In the near-field optical head comprising a focusing lens for forming a spot on the upper surface of the disk while focusing the light passing through the objective lens, The apparatus for preventing contamination of the near field optical head, characterized in that it further comprises a foreign matter collecting means made of a collecting electrode which is installed on the slider and electrostatically charged to collect the foreign matter around the slider. A slider having a focusing hole, which is supported by a suspension in the driver and penetrated in the vertical direction to penetrate the light source, an objective lens installed at an upper side of the focusing hole of the slider to refracting incident light, and a lower side of the slider's focusing hole. In the near-field optical head comprising a focusing lens for forming a spot on the upper surface of the disk while focusing the light passing through the objective lens, The apparatus for preventing contamination of a near field optical head, characterized in that it further comprises a foreign matter collecting means composed of a collecting electrode installed in the suspension and electrostatically charged to collect the foreign matter around the slider.