JPS59207442A - Master disk recorder - Google Patents

Abstract

PURPOSE:To decrease the drop-outs or noise of a recorded master disk by providing an air nozzle at a position near an optical recording lens which moves relatively with a feed stage containing a rotary part which holds a record master disk. CONSTITUTION:A record master disk 1 is put on a turntable 2 and revolved with a fixed number of revolutions by a turntable motor 5 via a spindle 3. An air nozzle 9 is provided at a position near a recording lens 8, and the clean air is sent out through the nozzle to blow off the dust sticking on the disk 1 when the disk 1 passes under the nozzle 9. Thus the disk 1 can be kept clean and therefore the drop-outs or noises of the recorded disk 1 can be decreased.

Description

[Detailed Description of the Invention] The present invention is suitable for recording master discs of high-density recording discs such as video discs, PCivi audio discs, and grooved discs of the DRA'W system such as files. 1゜Conventional example a, which relates to a master recording device for
Between lyryx and ryx, conventional master recording devices record master discs such as photoresists/7゛ clothed glass discs, etc.
7. 1, 1 recording is performed by rotating the laser beam and scanning and pezaging the laser beam A fc, which is modulated by the recording signal and then exposed. 1; 1 record % VCQC record bj
α; (If there is a μmq-\°1 stain on the
This will result in 1 drop out of the raw signal and noise, so
It is carried out in a clean booth or a clean booth with a high degree of cleanliness. And the recording master e-Y always j
・“1.It is important not to carry it around in a tall case to keep it away from dirt and dust.However,
No matter how much you want it, J'' Takemi (lC & 21) Fine dust floating in the air records LfA 1m above 71
'i, and it is the cause of Dronobu-out. the/
3rd disc, when installing the recording master directly in the master disc δg recorder, use an air gun etc. to blow 1'i clean air on the disc 1t-i.
I tried to shake off the dust that had accumulated in the area.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a master recording device that can simplify the process of creating a master disc and at the same time prevent dust from accumulating even during recording.

Composition of the Invention The present invention fd: In order to achieve the above-mentioned objective 1, a d recording master disc is modified by one direction and a rotating part mounted thereon is installed.
= IJ Karuta (f) An air injection nozzle is installed near the moving optical recording lens, and clean air is supplied to 7"'+' during recording.
The air is sprayed onto the recording master disc, and before recording starts, 1) the recording base and 1) the opening optical system begin to move relative to each other, and the innermost periphery of the recording master disc is sprayed onto the recording master disc. Rotate the recording master disk until the part reaches the position of the Nc2 record lens, and then blow clean air from the 5 air 1 shot nozzle onto the record coolant fj''A. Let us assume that the master recording device configured as shown in FIG.

A part of a master recording device according to an embodiment of ``A large stream of 1 row, 51 figures of wet dogs is a misfire'' is schematically shown as 4 scraps. 1 (1711) is a recording master disc, which is placed on the turntable 2 and rotated at a predetermined number of revolutions by the turntable 5 via the spindle 3. 4, and is configured to move with respect to the optical system by a feed drive mechanism (not shown). 6 indicates a laser beam, which is reflected downward by a mirror, and
The beam is focused by the HD recording lens 8 ← 1: The beam is irradiated onto the recording master 1, and as the recording master 1 rotates and the feed base 4 moves, the recording master 1
Run on top 1-.

Recording is then performed. In the device Mi of this example (・↓+5
An air injection nozzle 9 is provided near the lens 8. Then, when the operator presses the start button 1 (2 recording master disc 1 is placed on the turntable 2 and the operator presses the start button), the turning table 2 or LL! starts rolling. , the feed table 4 passes over the optical system and moves in the direction of the arrow 1Q. Then, clean air is jetted from the air jet nozzle 9, and the recording master 1 is sprayed from the jet nozzle 9.
As it passes under the disk, dust is blown off onto the recording master disk 1. To cover the entire recording range of the recording master disc 1, the feed stand 4 is moved until it reaches the innermost recording circumference of the recording master disc 1 or the position of the recording lens 8. 1st
In the figure, the position of the innermost circumference is indicated by a two-dot chain line. In some types of disk systems, recording is performed from the inner circumference to the outer circumference.In this case, the feed base is positioned at the innermost circumference, so that recording can be started immediately. In a system in which recording is performed from the outer circumference to the inner circumference of the pen, the feed table moves backwards to the recording start position of the outermost circumference. And during that time, you can still enjoy clean air.

-I:: ii own action CJ, l-7αf! LsuiJ
'lrE Mae(/ζZejinri Record Master 1' 2 haikuhode deru dust A:) If,! Blow out X, etc. (this is from Sobazudame, -+; /cif, - even inside the air jet nozzle 9. It can prevent IQ' and keep the recording section clean.

Figure 2 (・, 1) shows nine examples of more effective results when used in the present invention. is branched into two systems along the way and set to different pressures by force regulators and rakes 11 and 12. Then, an electromagnetic solenoid 13 is provided so that the air flow at the two pressures can be switched and used. In other words, air jetting before recording can remove dust well enough to suppress jetting HE, so it is desirable to use a high-pressure air flow.

However, when the injection air pressure at the time of "h" rises, 1 □ electric
, 1' is not preferable because it imparts vibration to the lens 8 and the recording master 1. Since we are just trying to prevent dust from building up during recording (d), there is no need to blow strongly, so a low injection j1-1 is sufficient.Therefore,
Recording 1): J M: li [□, air flow with high pressure is flowed, and during recording it is low (like flowing two air fAt')
r1Σ Magnet Lenoi)' 13
, .-, +11+i is formed.

The above theory IJ] It is said that the turntable side is the optical system (Ic
On the other hand, the optical system moves in a wooden manner, and the present invention can be used for the ill::i image.

Effects of the Invention The present invention has the following features: i: f'r~&, l2, ;1d Foreign matter such as dust Atsu1, □15 on the recording master is blown away before recording. Also, even during recording, clean air can be blown onto the recording section to maintain a clean state, and dropouts and noise in the recorded master can be reduced.

S/C eliminates the need to blow clean air using an air can, which was conventionally performed by an operator.

[Brief explanation of the drawing]

Fig. 1 shows a master recording nail according to an embodiment of the present invention, and a formula diagram of the main part of the device 6; It is a schematic diagram. 1...-1, ill frozen ground 111, 4 feeding platform, 8.
・ML recording lens, 9. Nozzle.

Claims (1)

[Claims] The optical system is moved relative to the feed table on which the recording master is mounted and the rotating part is mounted, and the optical system is recorded optically. Install an air injection nozzle near the lens and record '4';
/'fF, etc.: '5 qi is blown onto the recording master, and also before the beginning of peeling W9, the feed plate and the front 1
; The self-optical system begins to move in a direction of 41, and when it reaches the innermost recording circumference of the recording master or the position of the front recording lens, the recording master is rotated once, and the air injection nozzle A master recording device configured to blow cleaner air onto the recording master.