KR19990047625A - Optical pickup device - Google Patents

Abstract

The present invention relates to an optical pickup apparatus which records data on the surface of a disc by using all-optical light emitted from a light source and verifies data recorded at the same time by using a back light, thereby reducing the recording time and improving efficiency. In particular, all-optical light emitted from the optical module records information in the disk, and is then reflected into the optical module, and the back-light emitted from the optical module is incident on the recorded information of the disk, and then reflected back to the optical module. When scanned, these all-optical and back-lights are compared and judged in the signal detection photodiode inside the optical module, and the recorded information is verified, and the recording and verification of the information are simultaneously performed.

Description

Optical pickup device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup apparatus, and more particularly, to an optical pickup apparatus in which time is reduced by recording data using all-optical light and immediately verifying data recorded using the back-light.

In general, an optical pickup apparatus for reproducing a signal recorded on a magneto-optical disk or recording a signal on the magneto-optical disk includes a light source 1 for generating a laser light and a laser light emitted from the light source 1, as shown in FIG. Collimating lens 2 for parallel light, polarizing beam splitter 3 for generating isolation and circular polarization, lens 4 for focusing on disk 5, photodiode 6 for optical power detection, and And a photodiode 7 for signal detection.

In the conventional optical pickup apparatus configured as described above, the beam emitted from the light source 1 is scanned toward the lens 4 through the collimating lens 2 and the beam splitter 3, and the lens 4 is moved by the actuator in the focusing direction and the track. Direction is reproduced or recorded on the surface of the disk (5).

However, in the process of recording the information, access to the track position where the pickup was recorded to determine whether or not the data is recorded correctly is compared with the original data, so it takes a long time to record and the efficiency is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems, and an object of the present invention is to record data on the surface of a disc by using an electric light emitted from a light source and to verify data recorded at the same time by using a back light. The present invention provides an optical pickup apparatus which shortens recording time and improves efficiency.

1 is a schematic view of a conventional optical pickup device;

2 is a schematic view of the optical pickup device of the present invention;

3 is a detailed view of the optical pickup device of the present invention;

4 is a detailed view of a disc recording surface according to the present invention.

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

10: optical module 11: light source

12: grating 13: beam splitter

14 photodiode 15 reflector

16: hologram 17: photodiode

18: lens 19: disk

In order to achieve the above object, the present invention records the information in the optical module emitted from the optical module and then reflects the information inside the optical module and the backlight emitted from the optical module is incident on the recorded information of the disk. When the light is reflected and scanned into the optical module, the all-optical light and the back-light are compared and judged in the signal detection photodiode inside the optical module, and the recorded information is verified, and the recording and verification of the information are simultaneously performed.

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

2 is a schematic view of the optical pickup device of the present invention and Figure 3 is a detailed view of the optical pickup device of the present invention. Two beams from the lens 18 are scanned toward the disk 19 to record information, and the reflected beam is sent to the optical module 10 after recording. The optical module 10 is provided with a light source 11 therein, and a grating 12 for separating all the light that is scanned forward in the upper side of the light source 11 is provided. In addition, a beam splitter 13 is provided at a lower side of the light source 11 to separate the back light scanned downward, and to send a portion to the photodiode 14 for optical power control and a portion to the reflector 15.

In addition, a hologram 16 is provided on the upper side of the reflector 15 to send a beam for verification toward the disk 19, and a beam for photodetection for comparing and detecting the beams reflected back from the hologram 16 and the grating 12 is focused. Diode 17 is provided.

In the present invention configured as described above, the light source 11, the photodiode 14, 17, the beam splitter 13, and the like are embedded in the optical module 10. First, the beam from the light source 11 is emitted to the front and the rear, respectively. All the light exiting forward exits the grating 12 and exits toward the disk 19. As shown in FIG. 4, an RF beam is incident on the track of the disk 19 to record information, and the F and E beams are for track error detection. The back light emitted toward the rear of the light source 11 passes through the beam splitter 13, and part of the back light is emitted toward the photodiode 14 for adjusting the optical power. Therefore, the beam output of the light source 11 is adjusted, and a part of the light exits through the reflector 15 to the hologram 16 and injects the G beam to the recording surface of the disk 19 as shown in FIG. When the light is retroreflected together with the beam and incident toward the signal detection photodiode 17, the beams are compared and judged to verify the accuracy of the recorded information.

As described above, according to the present invention, the electric light emitted from the optical module is emitted toward the disc to record information, and the back light is emitted together to the disc. When the electric light and the back light are reflected back to the photodiode for signal detection, their signals Are simultaneously detected and compared and verified, thereby simultaneously recording the information on the disc and verifying the disc, thereby reducing the recording time.

Claims (2)

When the total light emitted from the optical module records information in the disk and then is reflected into the optical module, and the back light emitted from the optical module is incident on the recorded information of the disk and then reflected back and scanned into the optical module. The optical pick-up device, characterized in that the front and back light is compared and judged in the signal detection photodiode inside the optical module and the recorded information is verified, and the recording and verification of the information are performed at the same time. According to claim 1, wherein the optical module is provided with a light source and the grating to send all the light emitted to the front of the light source toward the disk, the back light emitted from the rear of the light source to the optical power control photodiode and the reflector, respectively Send beam splitter, And a photodiode for transmitting a beam reflected from the reflector toward the disk, and a photodiode for detecting a signal by comparing the hologram and a beam reflected back from the grating to detect the signal.