JPH0728588Y2 - Optical recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an optical recording / reproducing apparatus used for recording / reproducing an information signal in a memory card or the like using an optical recording medium. The present invention relates to an optical recording / reproducing apparatus having a function of simultaneously monitoring.

[Conventional technology]

Generally, in an optical card such as a memory card using an optical recording medium, information signals are recorded / reproduced by an optical recording / reproducing device having a configuration shown in FIGS. 2A and 2B.

In FIG. 2A schematically showing the configuration of a recording system of a conventional optical recording / reproducing apparatus, laser light emitted from a laser light source 21 for recording is guided to a polygon mirror 23 through a collimator lens 22. It is reflected by the polygon mirror 23 and is irradiated onto the optical recording medium 25 of the optical card 26 via the objective lens 24. Optical recording medium of the optical card 26
Information signals are optically recorded on the pits 25 scanned by the laser light by reflecting the laser light while the polygon mirror 23 rotates at a predetermined timing.

Further, in FIG. 2B schematically showing the structure of the reproducing system of the conventional optical recording / reproducing apparatus, the light emitted from the reproducing light source, that is, the light emitting diode 31, is the condenser lens 32.
Is guided to the semi-transparent mirror 33 through and is reflected by the semi-transparent mirror 33,
Optical recording medium of the optical card 26 through the imaging lens 34
Irradiated to 25. The light reflected by the recording medium 25 passes through the semi-transparent mirror 33 and a CCD (charge couple) for reading an information signal.
d Device) The line sensor 35 is irradiated. Then, the information signal recorded in the optical recording medium 25 of the optical card 26 is the line in which the light emitted from the light emitting diode 31 is reflected by the optical recording medium 25 through the semi-transparent mirror 33. By the sensor 35,
It is read by converting it into an electric signal according to the amount of the reflected light.

[Problems to be solved by the invention]

By the way, in the conventional optical recording / reproducing apparatus, since the recording system and the reproducing system are independently provided as described above, the number of component parts is large, and it is inevitable to increase the size and cost of the entire apparatus. Further, since the recording operation position and the reproducing operation position of the information signal are different, there is a problem that simultaneous monitoring cannot be performed during the recording operation.

In view of the above problems, the present invention aims at downsizing and cost reduction of an optical recording / reproducing apparatus used for recording / reproducing information signals in a memory card or the like using an optical recording medium, and It is an object of the present invention to provide an optical recording / reproducing apparatus having a novel structure that enables simultaneous monitoring of signals during recording.

[Means for solving problems]

In order to achieve the above-mentioned object, an optical recording / reproducing apparatus according to the present invention includes an optical card provided with an optical recording medium for recording an information signal, and a predetermined wavelength for recording the information signal on the optical recording medium. a laser light source that emits a laser beam having λw; a scanning unit configured to scan the optical recording medium with the laser beam from the laser light source and sequentially record information signals on the optical recording medium; A light emitting diode that emits light having a wavelength λr different from the wavelength λw of the laser light emitted from the light source, and a single connection that forms an image of the laser light from the laser light source and the light from the light emitting diode on the optical recording medium. The laser light from the laser light source, which is arranged on the optical path between the image lens, the scanning means and the imaging lens, and reflected by the optical recording medium, and Light selecting means for reflecting one of the light from the light emitting diode and transmitting the other light, and light from the light emitting diode reflected by the optical recording medium is irradiated through the light selecting means, and the laser light source is provided. And a line sensor for reading the information signal recorded on the optical recording medium by the laser beam from the.

[Action]

In the optical recording / reproducing apparatus according to the present invention, the laser light having a predetermined wavelength λw for recording an information signal on the optical recording medium emitted from the laser light source and the wavelength λr different from the wavelength λw of the laser light emitted from the laser light source are used. The light emitted from the light emitting diode included therein is imaged on the optical recording medium via the single image forming lens via the light selecting means.

Further, the laser light from the laser light source and the light from the light emitting diode which are imaged on the optical recording medium via the single image forming lens via the light selecting means scan the optical recording medium by the scanning means. To do.

〔Example〕

An embodiment of an optical recording / reproducing apparatus according to the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, a laser light source 1 for emitting a laser beam having a wavelength λw of, for example, about 780 nm is used as a recording light source for recording an information signal on an optical recording medium 11 provided in an optical card 10. Has been. Also an optical card
As a reproducing light source for reproducing the information signal recorded on the optical recording medium 11 provided on the optical recording medium 11, a normal light having a wavelength λr of about 660 nm different from the wavelength λw of the laser light emitted from the laser light source 1 is emitted. The light emitting diode 4 is used.

Then, as shown in FIG. 1, the wavelength λw emitted from the laser light source 1 is, for example, 78, which is located on the optical path between the polygon mirror 3 and the imaging lens 9 which constitute the scanning means described later.
A dielectric mirror 8 is provided as a light selecting means having a wavelength selectivity that allows a laser beam of about 0 nm to pass therethrough and reflects ordinary light having a wavelength λr of about 660 nm emitted from the light emitting diode 4. By disposing such a dielectric mirror 8, the laser light emitted from the laser light source 1 is guided through the dielectric mirror 8 to the optical recording medium 11 provided in the optical card 10.

Further, between the dielectric mirror 8 and the optical recording medium 11 provided on the optical card 10, the laser light emitted from the laser light source 1 and the light emitted from the light emitting diode 4 are coupled onto the optical recording medium 11. A single imaging lens 9 for imaging is provided.

In this example, the laser light emitted from the laser light source 1 is collimated by the collimator lens 2, reflected by the polygon mirror 3 that is rotated, transmitted through the dielectric mirror 8, and focused by the imaging lens 9. Then, an image is formed on the optical recording medium 11 of the optical card 10. The polygon mirror 3 is
The optical recording medium 11 is scanned by the laser light by reflecting the laser light emitted from the laser light source 1 while being rotated at a predetermined timing, and information signals are sequentially recorded on the optical recording medium 11 as a pit train. That is, the polygon mirror 3 transmits the laser light to the optical recording medium 11.
The scanning means is configured to scan upward.

It should be noted that a laser beam may be scanned on the optical recording medium 11 of the optical card 10 by using a galvanometer mirror, an optical modulator or the like instead of the polygon mirror 3.

Further, the light emitted from the light emitting diode 4 is guided to the semi-transparent mirror 6 via the condenser lens 5, reflected by the semi-transparent mirror 6, and further reflected by the dielectric mirror 8 to pass through the imaging lens 9. Optical recording medium of optical card 10
Imaged on 11. Then, the reflected light from the optical recording medium 11 of the optical card 10 is guided to the dielectric mirror 8 via the imaging lens 9, is reflected by the dielectric mirror 8, is further transmitted through the semi-transparent mirror 6, and is the auxiliary lens 14. The CCD line sensor 15 for reading the information signal is irradiated via the. That is,
The information signal recorded in the optical recording medium 11 of the optical card 10 is a line sensor in which the light emitted from the light emitting diode 4 is reflected by the optical recording medium 11 and guided through the dielectric mirror 8 to be applied. The signal is read by being converted into an electric signal according to the amount of the reflected light by the unit 15.

In addition, between the dielectric mirror 8 and the line sensor 15, an optical filter 7 that transmits only light having a wavelength λr of about 660 nm.
Are arranged to prevent the reflection component of the laser beam for recording the information signal from the dielectric mirror 8 from being applied to the line sensor 15 for reading the information signal.

In the embodiment having the above-mentioned configuration, the imaging lens 9 for focusing the laser light emitted from the laser light source and the light emitted from the light emitting diode 4 on the optical recording medium 11 of the optical card 10.
Since the laser light emitted from the laser light source and the light emitted from the light emitting diode 4 are guided through the dielectric mirror 8 having wavelength selectivity, one objective lens for the recording system and one imaging lens for the reproducing system are provided. Since it is also used as the lens 9, the number of constituent parts can be reduced, and the overall size and cost of the device can be reduced.

Further, since the recording operation and the reproducing operation of the information signal can be performed without moving the optical card 10, it is possible to monitor the information signal simultaneously at the time of recording.

[Effect of device]

As described above, the optical recording / reproducing apparatus according to the present invention includes the laser light emitted from the laser light source, which has a predetermined wavelength λw for recording an information signal on the optical recording medium, and the wavelength λw of the laser light emitted from the laser light source. Since the light emitted from the light emitting diode having a different wavelength .lamda.r from the above is formed on the optical recording medium through the single image forming lens through the light selecting means, the recording of the information signal is performed. The operation position and the reproduction operation position can be matched, and the information signals can be simultaneously monitored during recording.

In addition, since the optical recording medium is provided with a scanning unit configured to scan the optical recording medium with laser light from a laser light source and sequentially record information signals on the optical recording medium, the optical recording medium is moved and scanned. Since the recording and reproduction of the information signal can be realized without performing the control, and the control required for moving the recording medium is not necessary, the number of constituent parts can be reduced and the size and cost of the entire apparatus can be reduced. Can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an optical recording / reproducing apparatus according to the present invention. 2A and 2B are block diagrams schematically showing the configuration of a conventional optical recording / reproducing apparatus. FIG. 2A shows the recording system and FIG. 2B shows the reproducing system. 1 ... Laser light source 3 ... Polyhedral rotating mirror 4 ... Light emitting diode 8 ... Dielectric mirror 9 ... Imaging lens 10 ... Optical card 11 ... Optical recording medium 15 ... Line sensor

Claims (1)

[Scope of utility model registration request] 1. An optical card provided with an optical recording medium for recording an information signal, and a predetermined wavelength λw for recording an information signal on the optical recording medium.
A laser light source which emits a laser beam, a scanning means configured to scan the optical recording medium with the laser light from the laser light source, and sequentially record information signals on the optical recording medium; and the laser light source. A light emitting diode that emits light having a wavelength λr different from the wavelength λw of the laser light emitted from the laser beam, and a single image forming image of the laser light from the laser light source and the light from the light emitting diode on the optical recording medium. A lens, arranged on the optical path between the scanning means and the imaging lens, reflects one of the laser light from the laser light source reflected by the optical recording medium and the light from the light emitting diode. , The light from the light-emitting diode reflected by the optical recording medium and the light selecting means for transmitting the other is irradiated through the light selecting means, and The optical recording and reproducing apparatus comprising a line sensor for reading the information signal on said optical recording medium recorded by the laser light from the chromatography laser light source.