JPH05334717A - Optical pickup, optical disk device and information processor - Google Patents

Abstract

PURPOSE:To thin an optical pickup and to improve an optical characteristic by sharing a base plate by providing an actuator on the base plate directly and sticking and fixing an optical parts guiding a laser beam to an objective lens on the base plate. CONSTITUTION:The optical parts 4 and a semiconductor laser 5 are fixed on a 1a on the base plate 1 directly through adhesive material 20 and the outer peripheries of them are covered by a plastic member 21 in a film state and the optical parts 4 is held on a prescribed position. Further, a coil 10 is provided between magnetic field magnets 6, 7 of 1b on the base plate 1 and the actuator 13 consisting of a holder provided with the objective lens 11 is fixed directly by the adhesive material 20 and a 90 deg. beam deflection element 14 is provided on the inside. In such constitution, the laser beam 5a from the laser 5 is made incident on the objective lens 11, an optical disk 15 through the deflection element 14 and information is written and read. Thus, the entire optical pickup is thinned and the optical parts is positioned accurately and the deviation of the optical axis is suppressed and the reliability of a device is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup, an optical disc device and an information processing device, and more particularly to a novel improvement for thinning the optical pickup and improving optical characteristics by sharing a substrate.

[0002]

2. Description of the Related Art As an optical pickup of this type which has been conventionally used, the structure shown in FIG. 2 is generally adopted. That is, the reference numeral 1 in FIG. 2 is a substrate having a long shape, and one end side 1a of the substrate 1 is provided with first and second positioning seats 2 and 3 formed of concave portions. An optical component 4 made of a lens is positioned and held on the first positioning seat 2,
A semiconductor laser 5 is positioned and held on the positioning seat 3.

An actuator substrate 8 having a pair of field magnets 6 and 7 is mounted on the other end 1b of the substrate 1, and a coil located outside the yoke 9 is mounted on the actuator substrate 8. An actuator 13 consisting of a lens holder 12 having an objective laser 11 is provided. Therefore, by supplying a driving current to the coil 10, it is possible to freely perform a minute operation of the objective lens 13 in the tracking direction and the focusing direction.

In the conventional structure described above, the semiconductor laser 5
The laser beam 5a emitted from the laser beam enters the objective lens 11 via the 90 ° beam deflecting element 14 in the actuator 13 and the optical disc 15 above the objective lens 11, and the reflected light reflected by the optical disc 15 is shown in the figure. Not incident on the photoreceptor.

[0005]

Since the conventional optical pickup is constructed as described above, there have been the following problems. That is, since the actuator is provided on the actuator substrate provided on the substrate, the thickness of the entire optical pickup cannot be reduced. Further, since the optical component and the semiconductor laser are mounted on the positioning seat formed on the substrate, the thickness of the substrate is increased by the amount of the positioning seat, which is an obstacle to the reduction in thickness. Further, since the laser beam at a predetermined position cannot be obtained unless the positioning seat is processed and improved in precision, it costs a lot to process the positioning seat, which is a great obstacle to cost reduction. .. In addition, since the optical components were exposed on the substrate and held in direct contact with the outside air, they are easily affected by external influences, and the optical axis of the optical components is not affected by vibration and temperature changes. It was impossible to hold.

The present invention has been made to solve the above problems, and in particular, an optical pickup is made thin.
It is an object of the present invention to provide an optical pickup, an optical disc device, and an information processing device which are improved in optical characteristics by sharing a substrate.

[0007]

An optical pickup according to the present invention comprises an actuator directly provided on a substrate, an objective lens provided on the actuator, a semiconductor laser provided on the substrate, and an on-substrate. And an optical component for guiding the laser light from the semiconductor laser to the objective lens, and a resin member for covering the optical component, the optical component being adhesively fixed on the substrate. ..

More specifically, the semiconductor laser includes
A heat sink for radiating heat from the semiconductor laser is provided.

The optical disk device according to the present invention is an optical disk device comprising a combination of an optical pickup and an optical disk, wherein the optical pickup comprises an actuator directly provided on a substrate and an objective lens provided on the actuator. A semiconductor laser provided on the substrate, an optical component provided on the substrate for guiding laser light from the semiconductor laser to the objective lens, and a resin member for covering the optical component. It is a composition.

An information processing apparatus according to the present invention is an information processing apparatus in which information for an optical disc is processed by an optical pickup, wherein the optical pickup is an actuator provided directly on a substrate and an objective provided on the actuator. A lens, a semiconductor laser provided on the substrate, an optical component provided on the substrate for guiding laser light from the semiconductor laser to the objective lens, and a resin member for covering the optical component. It is composed of.

[0011]

In the optical pickup, the optical disc apparatus and the information processing apparatus according to the present invention, since the actuator is directly provided on the substrate and the optical parts are directly adhered and fixed to the substrate, the thickness of the optical pickup itself is thin. Can be In addition, since the optical component is covered with the resin member and solidified, the position of the optical component can be accurately held, adverse effects from the external environment can be prevented, and a stable optical axis of the laser beam can be held. be able to.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an optical pickup, an optical disk device and an information processing device according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described using the same reference numerals. FIG. 1 is a schematic configuration diagram showing an optical pickup according to the present invention.

A reference numeral 1 in FIG. 1 is a substrate having an elongated shape, and an optical component 4 including a lens and a semiconductor laser 5 are attached to an adhesive 20 at a predetermined position on one end side 1a of the substrate 1. Is fixed directly through. The semiconductor laser 5 is provided with a heat sink (not shown) for radiating heat.

A resin member 21 is formed on the outer periphery of the optical component 4 so as to cover it in a film shape. Since the resin member 21 is bonded and fixed to the upper surface of the substrate 1, the optical component 4 is It is solidified and held securely at a predetermined position on the substrate 1.

On the other end side 1b of the substrate 1, a pair of yokes 9 and 9a are provided so as to stand up integrally, and a pair of field magnets 6 are provided on the inner side surfaces of these yokes 9 and 9a. , 7 are mounted so as to face each other.

A coil 10 is provided at a position between the magnets 6 and 7 on the substrate 1, and an objective lens 11 is provided.
Actuator 13 consisting of a lens holder 12 equipped with
Are directly fixed with an adhesive 20, and a 90 ° beam deflection element 14 is provided in the actuator 13.

Further, an optical disk 15 is provided above the objective lens 11 of the optical pickup 30 having the above-mentioned structure via a case (not shown). The optical disk 15 is, for example, an automatic changer for a plurality of sheets (not shown). The optical disc device is configured to be automatically transferred via the optical disc device, and the information processing device is configured by disposing a plurality of the optical disc devices. It should be noted that, as is well known, the actuator 13 includes the coil 1
By supplying a drive current to 0, it is possible to freely perform a minute operation of the objective lens 13 in the tracking direction and the focusing direction.

In the above-mentioned structure, the laser beam 5a emitted from the semiconductor laser 5 is 90
In addition to being incident on the objective lens 11 via the beam deflecting element 14, the light is incident on the optical disc 15 on the objective lens 11, and the reflected light reflected by the optical disc 15 is incident on a light receiving body (not shown). Reading and reading can be performed.

[0019]

Since the optical pickup, the optical disk device and the information processing device according to the present invention are constructed as described above, the following effects can be obtained. That is, since the optical component and the actuator are directly bonded and fixed on the same substrate, the thickness of the entire optical pickup can be made significantly thinner than the conventional one. In addition, since the optical components provided on the substrate are covered with a resin member and fixed to the substrate and solidified, the positioning of the optical components can be accurately maintained even during long-term use, and adverse effects from the outside can be prevented. Therefore, high reliability can be maintained for a long time. In addition, since the actuator and the optical system substrate are common and the resin substrate increases the apparent thickness of the substrate that plays a role of rigidity, it is possible to secure high rigidity as an optical pickup. It is possible to reduce the deviation of the optical axis of the optical component due to temperature change and improve reliability.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an optical pickup according to the present invention.

FIG. 2 is a schematic configuration diagram showing a conventional optical pickup.

[Explanation of symbols]

 1 substrate 4 optical component 5 semiconductor laser 5a laser light 11 objective lens 13 actuator 21 resin member 30 optical pickup

Claims (4)

[Claims] 1. An actuator (13) directly provided on a substrate (1), an objective lens (11) provided on the actuator (13), and a semiconductor laser () provided on the substrate (1). 5) and the semiconductor laser provided on the substrate (1)
An optical component (4) for guiding the laser beam (5a) from (5) to the objective lens (11), and a resin member (21) for covering the optical component (4) are provided, and the optical The component (4) is the substrate (1)
An optical pickup having a structure in which it is adhered and fixed on the top. 2. The optical pickup according to claim 1, wherein the semiconductor laser (5) is provided with a heat sink for radiating heat of the semiconductor laser (5). 3. An optical disc device comprising a combination of an optical pickup (30) and an optical disc (15), wherein the optical pickup (30) comprises an actuator (13) directly provided on a substrate (1). The objective lens (11) provided on the actuator (13), the semiconductor laser (5) provided on the substrate (1), and the semiconductor laser (5) provided on the substrate (1) The laser light (5a) of the objective lens (11)
An optical disc device comprising an optical component (4) for guiding the optical component and a resin member (21) for covering the optical component (4). 4. An optical disc (1) is provided by an optical pickup (30).
In the information processing device adapted to process information for (5), the optical pickup (30) includes an actuator (13) directly provided on a substrate (1) and the actuator (1).
Objective lens (11) provided in 3), a semiconductor laser (5) provided on the substrate (1), laser light from the semiconductor laser (5) provided on the substrate (1) ( An information processing device comprising an optical component (4) for guiding 5a) to the objective lens (11) and a resin member (21) for covering the optical component (4).