KR100607944B1 - Optical head for recording and/or reproducing and optical recording and/or reproducing apparatus by adapting it - Google Patents

Abstract

A light source adapted to emit at least one light at the same time, an optical path converting means disposed on an optical path between the light source and the optical disk to convert a traveling path of the incident light, and floating by air dynamic pressure generated by rotation of the optical disk An objective lens installed on a slider moving on the optical disk and focused on the optical disk that is emitted from the light source and is incident on the optical disk by the optical path converting means, and the input end thereof is disposed to face the optical path converting means and is reflected from the optical disk. And an optical cable for transmitting the light incident through the objective lens and the optical path changing means to a long distance, and an optical detector for receiving the light transmitted through the optical cable, and the optical head using the same. A recording and reproducing apparatus is disclosed.

Since the optical head and the optical recording and reproducing apparatus have a structure in which the light source, the optical path converting means and the objective lens are disposed adjacent to each other, it is easy to align optically from the transmitting part, that is, the light source to the objective lens, and minimize the number of optical parts. have.

Description

Optical head for recording and reproducing, and optical recording and reproducing apparatus employing the same {Optical head for recording and / or reproducing and optical recording and / or reproducing apparatus by adapting it}

1 is a view schematically showing a configuration of a general optical recording and reproducing apparatus;

2 is a view schematically showing an optical configuration of an optical head employed in a conventional optical recording and reproducing apparatus;

3 is a sectional view schematically showing an optical recording and reproducing apparatus according to an embodiment of the present invention;

4 is a plan view schematically showing an optical recording and reproducing apparatus according to an embodiment of the present invention;

5 is a view schematically showing an optical configuration of an optical head for recording and reproducing according to an embodiment of the present invention;

6 is a cross-sectional view schematically showing one embodiment of a light source of an optical head according to the present invention;

7 is a view showing a plurality of light spots irradiated from the light source of FIG. 6 and joined to different tracks of the optical disc;

8A and 8B schematically show another embodiment of the objective lens of the optical head according to the present invention, respectively;

9 is a schematic view showing the structure of a polarization branch member provided at an optical cable output end of an optical head according to the present invention when the optical head and the optical recording and reproducing apparatus according to the present invention are provided to record and reproduce information by optical and magnetic field modulation. ,

10 is a schematic view showing an optical configuration of an optical head for recording and reproducing according to another embodiment of the present invention.

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

50 base 60 optical disc 70 swing member

71 ... swing arm 73 ... suspension 75 ... slider

80 Supports 90 Drives 100,400 Optical heads

110,410 ... light source 110a, 110b, 110c ... first to third surface light laser

130 ... Objective lens 131,133 ... First and second penetrations

135,137 ... first and second reflector 140 ... optical cable

150, 450 photodetector 160 ...

The present invention relates to an optical head for recording and reproducing, and an optical recording and reproducing apparatus employing the same. More particularly, the recording and reproducing optical can be further improved by recording and / or playing back at least one or more tracks simultaneously. A head and an optical recording and reproducing apparatus employing the same.

The optical recording and reproducing apparatus records and reproduces information by using an optical head. The optical recording and reproducing apparatus is classified into a carrier driving method and a swiss arm driving method according to the optical head driving method.

The carrier driving method is a method in which an optical head, that is, an optical pickup, is installed on the base so as to be linearly transported, and the optical pickup is moved in the inner and outer circumferential directions of the optical disk by a predetermined driving means.

On the other hand, the swing arm driving method is to transfer the optical spot formed on the optical disk by the optical head by using the swing arm swinging rotatably installed on the base, the position of the optical spot formed on the optical disk based on the hinge point By determining by swinging the swing arm, there is an advantage that the access time can be shortened as compared with the normal carrier driving method.

FIG. 1 discloses a conventional optical recording and reproducing apparatus which enables recording and reproducing by a swing arm driving method.

Referring to the drawings, a conventional optical recording and reproducing apparatus includes a swing arm 21 installed to reciprocally rotate with respect to a base (not shown), a driving unit 23 for providing a rotational driving force to the swing arm 21, and air. Slider 25 provided at the end of the swing arm 21 to scan the tracks of the optical disk 10 while floating on the optical disk 10 by dynamic pressure, and the optical disk 10 so that information can be reproduced optically. And an optical head 30 forming a light spot.

The optical disk includes a phase change type optical disk and a magneto-optical disk. When the optical disk is employed as the optical disk, the optical head 30 further includes a coil 35 for magnetic field modulation.

Referring to FIG. 2, the optical head 30 includes a light transmitting and receiving unit 40, a reflective mirror 32, an objective lens 33, and a small lens 34 made of a solid immersion lens (SIL). It is configured to include.

The transmitter / receiver 40 includes a bandore laser that generates and emits laser light, a photodetector that receives light reflected from the optical disk 10 and detects a reproduction signal, and the light emitted from the semiconductor laser is reflected mirror 32. The light reflected by the optical disk 10 and returned from the optical disk 10 includes a beam splitter for converting the traveling path of the light toward the photodetector, and is installed near the rotational axis of the swing arm 21.

Light irradiated to the light-receiving portion 40 relatively far from the slider 26 is reflected toward the objective lens 33 by the reflection mirror 32. The objective lens 33 focuses incident light onto the small lens 34, and the small lens 34 focuses the light irradiated from the transmitter / receiver 40 onto the optical disk 10 at a large incident angle. Light spots are formed in the

The slider 25 is biased in the direction in which the suspension 26 is in contact with the optical disc 10. When the optical disc 10 starts to rotate, the slider 25 is floated from the optical disc 10 by the pneumatic pressure. At this time, the air gap G between the small lens 34 and the optical disk 10 formed is a close distance of about 20 to 300 nm smaller than the wavelength of the light irradiated from the light-receiving unit 40 to form a near field. The light spot size formed in (10) becomes close to the desired light spot size.

Here, the near field refers to a technique for performing data recording and reproducing in a state where the distance between the optical element and the recording medium disposed in proximity to the recording medium such as an optical disc is close to, for example, about 20 to 300 nm.

However, since the optical path of the optical recording and reproducing apparatus is designed to have a long light path from the transmitting / receiving part 30 provided in the swing arm 21 to the objective lens 33 provided in the slider 26, the small size from the transmitting and receiving part 40 Optical alignment up to lens 34 is difficult.

In addition, since the conventional optical head is provided to scan a single track, the recording and reproducing speed of the optical recording and reproducing apparatus employing it is limited.

Disclosure of Invention The present invention has been made in view of the above, and has an improved structure for easy optical alignment, and an optical head for recording and reproducing, capable of simultaneously recording and / or reproducing at least one track and an optical recording employing the same. The purpose is to provide a playback device.

An optical head for recording and reproducing according to the present invention for achieving the above object comprises: a light source adapted to emit at least one or more lights simultaneously; Optical path converting means disposed on an optical path between the light source and the optical disk to convert a traveling path of incident light; An objective lens for condensing light emitted from the light source and incident through the optical path converting means and condensed on the optical disk; An optical cable having an input end thereof facing the optical path converting means and transmitting the light reflected from the optical disk and incident through the objective lens and the optical path converting means at a long distance; And a photodetector for receiving light transmitted through the optical cable.

In addition, the optical recording and reproducing apparatus according to the present invention for achieving the above object includes a base; An optical disk rotatably installed on the base; A light source configured to emit at least one light at the same time, an optical path converting means disposed on an optical path between the light source and the optical disk, and converting a traveling path of incident light, and disposed between the optical path converting means and the optical disk An objective lens for focusing the light incident from the light source to be formed on the optical disk, an optical cable reflected from the optical disk and transmitted through the objective lens and the optical path converting means at a relatively long distance, and the optical cable An optical head provided to simultaneously scan at least one or more tracks, including a photodetector mounted to the base to receive light transmitted through the base; The light source and the optical path converting means is installed, the swing arm for supporting at least a portion of the optical cable, one end is provided on the surface facing the optical disk of the swing arm is a suspension for elastically biasing the other end, and installed on the other end of the suspension A swing member which is in contact with the optical disk by the elastic bias of the suspension and includes a slider on which the objective lens is mounted; A support part supporting the swing member reciprocally about one hinge point on the base; And a driving unit for reciprocating the swing member.

At this time, the optical path converting means is preferably installed directly above the objective lens.

On the other hand, according to the present invention as described above, the light source is preferably composed of at least two semiconductor lasers disposed adjacent to each other.

In addition, the slider and / or the coil member provided on the lower portion of the optical disk moving on the optical disk while being floated by the air dynamic pressure generated by the rotation of the optical disk and the objective lens is installed; And a polarization branch member for splitting light transmitted through the optical cable according to a polarization component, wherein the photodetector receives light of different polarizations transmitted through the optical cable and branched by the polarization branch member, respectively. It is preferable that a plurality is provided so as to be provided to record and reproduce a signal by light and magnetic field modulation.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the optical head for recording and reproducing according to the present invention and an optical recording and reproducing apparatus employing the same.

3 to 5, the optical recording and reproducing apparatus employing the recording and reproducing optical head 100 according to the embodiment of the present invention, the base 50, and is rotatably installed on the base 50; An optical disc 60, an optical head 100 for irradiating at least one or more optical spots to the optical disc 60 to simultaneously record and reproduce at least one track information, and at least some components of the optical head 100 The swing member 70 is mounted, a support part 80 supporting the swing member 70 to reciprocally rotate, and a driving part 90 driving the swing member 70 to reciprocally rotate.

The optical disc 60 is mounted on the spindle motor 51 installed in the base 50 and rotated on the base 50. Here, the optical disk 60 includes a phase change type optical disk and a magneto-optical disk. When the optical disk 60 is used as the optical disk 60, the optical head 100 is a coil member for magnetic field modulation as will be described later. 179 is further provided. In the present embodiment, a case where the magneto-optical disk is employed as the optical disk 60 will be described by way of example.

The optical head 100 according to an embodiment of the present invention is disposed on the light source 110 and the optical path between the light source 110 and the optical disk 60 to emit at least one or more lights at the same time Optical path converting means 120 for converting the advancing path of the incident light and the light emitted from the light source 110 and incident through the optical path converting means 120 to focus on the optical disk 60 An optical cable 140 for transmitting the light reflected from the objective lens 130, the optical disk 60 and the incident light through the objective lens 130 and the optical path converting means 120 at a long distance, and the optical cable 140 It includes a photodetector 150 for receiving the light transmitted through.

Preferably, the light source 110 is composed of at least two semiconductor lasers disposed adjacent to each other to emit light so that light spots can be formed on at least two or more tracks formed on the recording surface of the optical disc 60. The semiconductor laser includes an edge emitting laser and a vertical cavity surface emitting laser.

6 is a cross-sectional view illustrating an example of a surface light laser employed as the light source 110. As shown, the light source 110 includes first to third surface light lasers 110a, 110b, and 110c disposed adjacent to each other. Each of the surface light lasers 110a, 110b, and 110c includes a substrate 112 and a lower reflector layer 113, an active layer 114, and an upper reflector layer 115 that are sequentially stacked on the substrate 112. And an upper electrode layer 116 formed on the upper reflector layer 115 and a lower electrode layer 111 formed below the substrate 112. The lower reflector layer 113 is, for example, n-type doped, and is formed by alternately stacking two semiconductor material layers having different refractive indices. The upper reflector layer 115 is formed by alternately stacking two layers of semiconductor material different from the lower reflector layer 113, for example, p-type and having different refractive indices. The upper electrode layer 116 is formed with a window 117 through which the light passing through the upper reflector layer 115 can be emitted. The first to third surface light lasers 110a, 110b and 110c configured as described above are usually manufactured simultaneously on the same substrate 111 on one substrate 111 in the manufacturing process.

As such, when the first to third surface light lasers 110a, 110b, and 110c are used as the light source 110, light is emitted from the three windows 117, as shown in FIG. 7. The light incident on the optical disk 60 via the optical path converting means 120 and the objective lens 130 is formed as light spots at different track positions on the recording surface.

In this case, the first to third surface light lasers 110a, 110b, 110c may be selectively driven. For example, at the time of reproduction, all of the first to third surface light lasers 110a, 110b and 110c are driven to reproduce three track information simultaneously, and at the time of recording, one of the second surface light lasers ( It may also be operated to drive only 110b) to record single track information. In this case, the regeneration speed is three times faster than the conventional one.

Here, as described with reference to FIG. 6, the light source 110 may be configured to include a plurality of surface light lasers, and may be implemented by employing another type of semiconductor laser, for example, an edge emitting laser as an array structure. It may be.

The light path converting means 120 directs the light incident from the light source 110 toward the optical disk 60, and the light incident from the optical disk 60 toward the photodetector 150. Transmit and reflect. In the present exemplary embodiment, the optical path converting means 120 employs a cubic-type beam splitter. However, light incident from the light source 110 is transmitted through the light beam 110, and light reflected from the optical disk 60 is incident. A hologram element (not shown), a prism-type beam splitter (not shown), or the like, which diffractively transmits in the + 1st or -1st order, may be employed.

The objective lens 130 is mounted on a slider 75 which will be described later. The objective lens 130 includes, for example, a solid immersion mirror so as to realize a high number of apertures and / or a near field. The objective lens 130 made of the solid impregnated mirror may include a first transmission part 131 for diverging and transmitting incident light, a second transmission part 133 spaced apart from the first transmission part 131 by a predetermined distance, and the second transmission part 133. The first reflection part 135 and the first reflection part 135 formed around the transmission part 133 to reflect the divergent light incident from the first transmission part 131 and the first reflection part 131 are formed. And a second reflector 137 for reflecting and focusing the light reflected by the light.

The first transmission portion 131 forms an incident region of a predetermined size and has a concave curvature. In this case, the first transmission part 131 may be processed into an aspherical surface so as to converge light incident on different light paths slightly spaced from the light source 110 toward different positions. Partial light corresponding to the paraxial region of the divergent light transmitted through the first transmission part 131 is incident on the second transmission part 133 facing the first transmission part 131 and most of the remaining light is reflected by the first reflection part. Incident to the unit 135. The first reflecting unit 135 forms an approximately planar reflecting surface and reflects light incident from the first transmitting unit 131. The second reflecting portion 137 is a concave reflecting surface and reflects diverged light incident from the first reflecting portion 135 to focus toward the second transmission portion 133. The second transmission part 133 transmits light in the paraxial region incident on the first transmission part 131 and focused light incident on the second reflection part 137 to form an optical spot on the optical disc 60.

At this time, since at least a portion of the outer planar portion of the first reflecting portion 135 is placed on the slider 75, the second transmission portion 133 has a near field between the exit surface and the optical disk 60 at a close distance. It is preferable that it is formed to protrude toward the optical disc 60 so as to realize it.

In addition, the refractive index of the air inside the objective lens 130 provided as described above, in particular, between the first transmission portion 131 and the first reflection portion 135 and between the second reflection portion 137 and the second transmission portion 133. It is preferably made of an optical material having a larger refractive index, so that the light incident from the first transparent portion 131 and the second reflective portion 137 toward the second transparent portion 133 can be refracted and focused while being transmitted.

Here, the objective lens 130 is positioned so that the first reflecting unit 135 is opposed to the first transparent unit 131, the second transparent unit 133 is provided around the first reflecting unit 135, the first The transmission part 131 may be provided to allow the transmitted light to enter the first reflection part 135 positioned in the paraxial region. In this case, the slider 75 is engaged with the outer side of the second reflecting portion and the second transmitting portion.

The objective lens 130 having the above structure has a large focusing force and can perform near field recording and / or reproducing. In addition, the distance between the exit surface of the objective lens 130 and the optical disk 60 can be formed closer than in the conventional case. Therefore, the size of the light spot can be greatly reduced, and recording and reproducing can be performed at a much higher density than the conventional one.

Alternatively, the objective lens 130 may be configured as shown in FIGS. 8A and 8B. That is, as shown in FIG. 8A, the objective lens 230 may be composed of two focusing lenses 231 and 233 so as to realize a high number of apertures, and as shown in FIG. 8B, the objective lens 330. It may be provided with a hologram member 335 is provided with a single focusing lens to adjust the spread angle by diffracting incident light before the objective lens 330. At this time, the structure in which the objective lenses 230 and 330 having the above configuration are mounted on the slider 75 is appropriately modified.

The optical cable 140 is installed such that its input end 141 faces the optical path converting means 120 and is reflected from the optical disc 60 and enters through the objective lens 130 and the optical path converting means 120. It transmits the light to a long distance. In addition, the photodetector 150 receives the light transmitted through the optical cable 140.

According to a preferred embodiment of the present invention, the optical head 100 and the optical recording / reproducing apparatus employ an optical magnetic disk which changes the polarization state of the light reflected therefrom according to the magnetic field state of the optical disk, and thus by optical and / or magnetic field modulation. In order to record and / or reproduce a signal, the optical head 100 according to the present invention is polarized to branch light transmitted through the coil member 179 installed on the slider 75 and the optical cable 140 according to the polarization component. It is preferable to further provide a branch member 160. Of course, the photodetector 150 is provided in plural to receive light of different polarizations branched by the polarization branching member 160, respectively.

Therefore, in the structure of recording and reproducing three tracks at the same time, the photodetector 150 is composed of three split plates which independently photoelectrically convert each other so as to reproduce information of each track.

Referring to FIG. 5 again, the coil member 179 may be installed on the slider 75 to surround the second transmission portion 133 of the objective lens 130, or may be installed below the optical disc 60. have.

The polarization branch member 160 is preferably formed integrally on the output end side of the optical cable 140 to reflect and transmit the light transmitted through the optical cable 140 according to the polarization component. That is, as shown in Figure 9, the mirror 165 for transmitting and reflecting the incident light in accordance with the polarization component on one side of the output end of the optical cable 140 may be formed obliquely with respect to the traveling direction of the light. Alternatively, a cubic-type or prism-type polarizing beam splitter may be positioned at an output end of the optical cable 140, but various embodiments may be possible.

Since the structure employing the optical cable 140 as described above can transmit the light reflected from the optical disk 60 at a long distance, the polarization branch member 160 and / or a plurality of photodetectors 150 are installed in the base 50 In particular, in the case of the light and magnetic field modulation type, the load applied to the swing member 70 can be minimized, and the polarizing branch member 160 and the plurality of photodetectors 150 as described above can be easily installed.

When the optical head 100 according to the embodiment of the present invention as described above includes at least two or more semiconductor lasers disposed to be adjacent to each other as the light source 110, the optical head 100 may emit light on at least two or more different tracks of the optical disc 60. Since the spot s can be formed at the same time, at least two or more tracks can be simultaneously scanned, and a near field can be realized, and high-density information can be recorded and reproduced at high speed by light and / or magnetic field modulation.

The swing member 70 is provided with a swing arm 71 on which the light source 110 and the light path converting means 120 are installed, and one end of the swing member 70 facing the optical disk 60 of the swing arm 71. A suspension 73 for elastically biasing the other end and a slider 75 provided at the other end of the suspension 73 are included.

The light source 110 is installed at a portion of the swing arm 71 relatively far from the support 80, and the light emitted from the light source 110 may travel toward the optical disc 60 at the swing arm 71. The light passing hole 71a is formed so that it may become. The light path converting means 120 is installed on the side of the swing arm 71 facing the optical disk 60 so as to face the light source 110. In addition, the swing arm 71 supports a portion of the optical cable 140 so that the input end 141 of the optical cable 140 is installed to face the optical path converting means 120.

Preferably, the suspension 73 has a leaf spring having a predetermined elastic force, and the slider 75 is not rotated by the optical disk 60 due to the elastic bias of the suspension 73 as described above. ) And the objective lens 130 is mounted inside the optical disk 60 to be spaced apart from the optical disk 60 by a predetermined distance.

In this case, the light path converting means 120 is located directly above the objective lens 130 installed on the slider 75. Therefore, the light source 110, the light path converting means 120, and the objective lens 130 are disposed in close proximity to each other to facilitate optical alignment, and the light path from the light source 110 to the objective lens 130 is short.

The support unit 80 supports the swing member 70 as described above so as to reciprocate around the hinge point on the base 50.

The drive unit 90 provides a reciprocating rotational driving force of the swing member 70. To this end, the driving unit 90 is connected to the swing member 70 opposite to the support unit 80 with respect to the swing member 70, for example, a coil member configured to reciprocate with the swing member 70. 91 and the yoke members 93a and 93b provided on the base 50 and positioned above and below the coil member 91, and the yoke member so as to face the coil member 91. Magnets 95a and 95b provided in the 93a and 93b.

Accordingly, the swing member 70 is reciprocated by mutual electromagnetic force with the magnets 95a and 95b which are changed by adjusting the strength and direction of the current applied to the coil member 91, and thus optical The head 100 records and reproduces at least one track information of the optical disc 60.

When the optical disc 60 is rotated in the optical recording and reproducing apparatus according to the present invention as described above, the slider 75 which has been in contact with the optical disc 60 is floated due to the air dynamic generated by the rotation of the optical disc 60. And the air gap G between the exit surface of the second transmission portion 133 of the objective lens 130 and the optical disk 60 is a wavelength of the light irradiated from the light source 110. The smaller the 20-300nm, the smaller the proximity interval, the near-field, the size of the light spot formed on the optical disk 60 is closer to the desired light spot size.

The above-described optical recording and reproducing apparatus according to the present invention is also applicable to the case where an optical disc having information recorded on both sides and / or an optical disc having two or more sheets arranged coaxially and spaced apart from each other by a predetermined interval is employed. Can be. In this case, the swing member 70 and the optical head 100 or 200 are provided in accordance with the double-sided recording structure and / or the number of sheets of the optical disc, and the swing member is provided in the base so as to be continuously stacked in the vertical direction.

In addition, since the optical recording and reproducing apparatus according to the present invention as described above can be slimmed down, it can also be installed in a jacket structure as illustrated in FIG.

Here, the present embodiment has been described using the coil member and the polarizing branch member to record and reproduce information by optical and magnetic field modulation, for example, but do not drive the coil member or the coil member and the polarizing branch member The information can be recorded and reproduced only by light by eliminating and forming a structure having a single photodetector.

On the other hand, the optical configuration of the optical head for recording and playback according to an embodiment of the present invention described with reference to Figure 5 as shown in Figure 10 to form a single optical spot on the optical disk, and to transmit light through a single optical cable By simply modifying, the single track information can be recorded and reproduced. At this time, the light source 410 is provided with a semiconductor laser to form a single light spot on the optical disk 60, the photodetector 450 is reflected from the optical disk 60 is transmitted through the optical cable 140 It is arranged to receive a single light spot.

10 shows an example in which a single focusing lens having a high number is employed as an objective lens. 10 illustrates an optical head provided to be suitable for recording and reproducing information by employing an optical disk such as a phase change type optical disk for recording and reproducing information only by light to the optical disk 60, but as shown in FIG. Of course, can be employed. When the magneto-optical disk is used as the optical disk 60, the coil member 179 and the polarization branch member 160 may be further provided as in FIG. 5, and a pair of photodetectors 450 may be provided.

The optical head for recording and reproducing according to another embodiment of the present invention as described above is installed in the optical recording and reproducing apparatus as shown in FIGS. 3 and 4 similarly to the optical head 100 of the embodiment of the present invention, so as to provide a single track. Record and play back information.

 The optical head for recording and reproducing according to the present invention as described above has a structure in which the light source, the optical path converting means, and the objective lens are disposed adjacent to each other, so that the optical alignment from the light transmitting part, that is, the light source to the objective lens is easy, and the number of optical parts Can be minimized

In addition, since the light reflected from the optical disc is transmitted and detected remotely through the optical cable, the optical alignment of the light receiver is easy.

In addition, when the recording and / or reproduction of at least two or more tracks can be performed simultaneously, a high speed recording and / or reproduction speed can be realized.

Therefore, the optical recording and reproducing apparatus employing the optical head as described above can significantly reduce the load of the swing arm in the case of the structure of recording and reproducing the information by optical and magnetic field modulation, which enables fast access and is significantly faster than the conventional art. The recording / reproducing speed can be realized, and the information of the optical disc can be recorded and / or reproduced at high speed by employing the optical head for multi-track scanning.

In addition, the optical recording and reproducing apparatus according to the present invention as described above is simple in overall device structure.

Claims (11)

A light source configured to emit at least one or more lights simultaneously; Optical path converting means disposed on an optical path between the light source and the optical disk to convert a traveling path of incident light; An objective lens for condensing light emitted from the light source and incident through the optical path converting means and condensed on the optical disk; An optical cable having an input end thereof facing the optical path converting means and transmitting the light reflected from the optical disk and incident through the objective lens and the optical path converting means at a long distance; And a photodetector configured to receive light transmitted through the optical cable. The objective lens, A first transmission part forming an incident area and transmitting and transmitting incident light; A first reflection part positioned to be spaced apart from the first transmission part by a predetermined distance and reflecting light incident from the first transmission part; A second reflection part formed around the first transmission part to reflect and focus the light reflected by the first reflection part again; And And a second transmission portion provided inside or outside the first reflection portion to transmit incident light to focus on the optical disk. The optical head for recording and reproduction according to claim 1, wherein the light source is made of at least one semiconductor laser. A light source configured to emit at least one or more lights simultaneously; Optical path converting means disposed on an optical path between the light source and the optical disk to convert a traveling path of incident light; An objective lens for condensing light emitted from the light source and incident through the optical path converting means and condensed on the optical disk; An optical cable having an input end thereof facing the optical path converting means and transmitting the light reflected from the optical disk and incident through the objective lens and the optical path converting means at a long distance; And a photodetector configured to receive light transmitted through the optical cable. A slider and / or a coil member disposed below the optical disk and moving on the optical disk while being floated by the air dynamic pressure generated by the rotation of the optical disk; And a polarization branch member for branching the light transmitted through the optical cable according to the polarization component. The photodetector is provided with a plurality of to receive the light of different polarization, respectively transmitted through the optical cable and branched by the polarization branch member, An optical head for recording and reproducing, characterized in that it is provided for recording and reproducing a signal by light and magnetic field modulation. The method of claim 3, wherein the polarization branch member, And an optical head integrally formed at an output end side of the optical cable such that light transmitted through the optical cable diverges according to the polarization component. The method according to claim 3 or 4, wherein the objective lens, A first transmission part forming an incident area and transmitting and transmitting incident light; A first reflection part positioned to be spaced apart from the first transmission part by a predetermined distance and reflecting light incident from the first transmission part; A second reflection part formed around the first transmission part to reflect and focus the light reflected by the first reflection part again; And And a second transmission portion provided inside or outside the first reflection portion to transmit incident light to focus on the optical disk. A base; An optical disk rotatably installed on the base; A light source configured to emit at least one light at the same time, an optical path converting means disposed on an optical path between the light source and the optical disk, and converting a traveling path of incident light, and disposed between the optical path converting means and the optical disk An objective lens for focusing the light incident from the light source and condensing on the optical disk, and an input end thereof facing the optical path converting means, reflected from the optical disk, and incident through the objective lens and the optical path converting means An optical head provided to scan at least one track simultaneously, including an optical cable for transmitting a relatively long distance and a photodetector installed in the base to receive light transmitted through the optical cable; The light source and the optical path converting means is installed, the swing arm for supporting at least a portion of the optical cable, one end is provided on the surface facing the optical disk of the swing arm is a suspension for elastically biasing the other end, and installed on the other end of the suspension A swing member which is in contact with the optical disk by the elastic bias of the suspension and includes a slider on which the objective lens is mounted; A support part supporting the swing member reciprocally about one hinge point on the base; And a driving unit for reciprocating the swing member. The objective lens, A first transmission part forming an incident area and transmitting and transmitting incident light; A first reflection part positioned to be spaced apart from the first transmission part by a predetermined distance and reflecting light incident from the first transmission part; A second reflection part formed around the first transmission part to reflect and focus the light reflected by the first reflection part again; And And a second transmission portion provided inside or outside the first reflection portion to transmit incident light to focus on the optical disk. The optical recording and reproducing apparatus according to claim 6, wherein the optical path converting means is provided directly above the objective lens. 7. The optical recording and reproducing apparatus according to claim 6, wherein the light source is made of at least one semiconductor laser. A base; An optical disk rotatably installed on the base; A light source configured to emit at least one light at the same time, an optical path converting means disposed on an optical path between the light source and the optical disk, and converting a traveling path of incident light, and disposed between the optical path converting means and the optical disk An objective lens for focusing the light incident from the light source and condensing on the optical disk, and an input end thereof facing the optical path converting means, reflected from the optical disk, and incident through the objective lens and the optical path converting means An optical head provided to scan at least one track simultaneously, including an optical cable for transmitting a relatively long distance and a photodetector installed in the base to receive light transmitted through the optical cable; The light source and the optical path converting means is installed, the swing arm for supporting at least a portion of the optical cable, one end is provided on the surface facing the optical disk of the swing arm is a suspension for elastically biasing the other end, and installed on the other end of the suspension A swing member which is in contact with the optical disk by the elastic bias of the suspension and includes a slider on which the objective lens is mounted; A support part supporting the swing member reciprocally about one hinge point on the base; And a driving unit for reciprocating the swing member. A coil member disposed below the slider and / or the optical disk; And a polarization branch member for branching the light transmitted through the optical cable according to the polarization component. The photodetector is provided with a plurality of to receive the light of different polarization, respectively transmitted through the optical cable and branched by the polarization branch member, And recording and reproducing a signal by optical and magnetic field modulation. The method of claim 9, wherein the polarization branch member, And an optical recording and reproducing apparatus integrally formed at an output end side of the optical cable such that light transmitted through the optical cable is branched according to the polarization component. The method of claim 9 or 10, wherein the objective lens, A first transmission part forming an incident area and transmitting and transmitting incident light; A first reflection part positioned to be spaced apart from the first transmission part by a predetermined distance and reflecting light incident from the first transmission part; A second reflection part formed around the first transmission part to reflect and focus the light reflected by the first reflection part again; And And a second transmission portion provided inside or outside the first reflection portion to transmit incident light to focus on the optical disk.

Images