JPS61267944A - Recording/reproducing device for optical disk - Google Patents

Abstract

PURPOSE:To constitute a device so that it can be used in a place where humidity is high, by providing a heating device for evaporating the moisture adhering to optical parts. CONSTITUTION:A hot air blow-off part 9 is constituted so that hot air is blown off by combining an electric heater and a fan, and its hot air hits against a collimator lens 5 to which a water droplet adheres and its periphery, and evaporates the moisture, and information which is accumulated in a disk 6 can be read without an error. Accordingly, the device can be used in a place where humidity is high.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an optical disc recording/reproducing device.

[Conventional technology]

The second reason is the diagram showing the reading device of a conventional optical disc recording/playback device. A collimator lens that emits light, (3) a diffraction grating that splits the focused beam, and (4) a beam splitter that separates the light incident on the disk and the reflected light.
1 (5) is a collimator lens that focuses light onto a disk, (6) is a disk that records information, (7) is a collimator lens that focuses reflected light onto a detector, and (8) is a photodetector. It is a vessel.

Next, the operation will be explained. The light emitted from the laser (1) passes through the collimator lens (2) and passes through the diffraction grating (
After passing through 3), it is reflected by the beam splitter (4),
The light is focused by the collimator lens (5), and the light is focused onto the disk (6).
) K is incident. After the light reflected by the unevenness of the disk (6) passes through the collimator lens (5) again, a part of the light is separated by the beam splitter (4), and a part of this light passes through the collimator lens (7). through the photodetector (8
) to reach. Information on the disk (6) can be read by the signal sent to the photodetector (8).

[Problem that the invention seeks to solve]

However, this conventional device is often used in places with high humidity, and fine water droplets often adhere to the upper part of the collimator lens (5), which scatters the light and often impedes the reading ability. .

This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an optical disc recording and reproducing device that can remove water droplets adhering to optical components or prevent water droplets from adhering to them. shall be.

[Means for solving problems]

The optical disk recording and reproducing apparatus according to the present invention includes a heating device that evaporates water droplets attached to optical components.

[Effect]

In this invention, since the heating device heats the optical components to which water droplets should not adhere by blowing hot air or the like, the water droplets evaporate, thereby preventing the scattering of light by the water droplets and, by extension, the reading cine performance.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is a laser serving as a light source, (2) is a collimator lens that focuses the light emitted from laser (1), (3) is a diffraction grating that splits the focused beam, ( 4) is a beam splitter 1 for separating light incident on the disk and reflected light; (5) is a collimator lens that focuses the light onto the disk; (6) is a disk on which information is recorded; (7) is a collimator lens that focuses the light onto a detector, (8) is a photodetector, and (9) is a hot air blower, which is an optical component in the incident path or reflected light path, especially the collimator. It functions as a heating device that evaporates moisture adhering to the lens (5).

Next, the operation will be explained.

The hot air blowing section (9) blows out warm air using a combination of an electric heater and a fan, and the warm air hits the collimator lens (5) and its surroundings where water droplets are attached, removing moisture. The disk (6) will be evaporated.
The information stored in can be read without errors.

In the above embodiment, a combination of an electric heater and a 77-ton was used as the hot air blowing section (9), but a heat source near the hot air blowing section may also be used.

〔Effect of the invention〕

As described above, according to the present invention, an optical disc recording/reproducing device is provided with a heating device that evaporates moisture adhering to optical components, so that the device can be used in a humid place. There is 0

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an optical disk recording/playback apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional optical disk recording/playback apparatus. (1) is a laser, (2) is a collimator lens, (3
) is a diffraction grating, (4) is a beam splitter, (5) is a collimator lens, (6) is a disk, (7) is a collimator lens, (3) is a photodetector, and (9) is a hot air blower. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In an optical disc recording and reproducing device that irradiates light onto a disc and reproduces information from the reflected or transmitted light, a heating device that evaporates moisture adhering to optical components in the incident light optical path or reflected light optical path. An optical disc recording and reproducing device comprising: (2) The optical disc recording and reproducing apparatus according to claim 1, wherein the heating device blows hot air onto the optical component.