JPH0585016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disk inspection apparatus, and more particularly to an optical disk inspection apparatus for inspecting the optical characteristics and information read/write characteristics of an optical head optical disk.

[Conventional technology]

A conventional optical disk inspection device includes a spindle that holds and rotates the center of the axis of the optical disk, a uniaxial table that is moved by a control motor in the direction of the center of the optical disk, and a uniaxial table that is fixed to the top surface of the uniaxial table. It includes a head mounting section for fixing an optical head on the upper part.

Next, a conventional optical disk inspection apparatus will be explained in detail with reference to the drawings.

FIG. 2 is a perspective view including an example of a conventional optical disk inspection device.

The optical disk inspection apparatus shown in FIG.
1 and a spindle 23 for rotating the motor.

Next, the operation will be explained.

First, the spindle motor 25 is activated to rotate the optical disk 21 at a predetermined number of rotations. Next, the control motor 27 is operated, and the single-axis table 2
6 is moved in the direction of the center of the optical disk 21 at a predetermined speed. In this step, from the time when the optical head 22 reaches the outer diameter position of the optical disk 21, the optical head 22 is operated to irradiate the optical disk 21 with laser light, and the optical disk 21 and the optical head 22 are
Inspect various characteristics of

[Problem that the invention seeks to solve]

In the conventional optical disk inspection apparatus described above, the direction of the optical axis of the laser beam irradiated from the optical head is determined by the head mounting part and cannot be changed. The disadvantage was that it lacked reliability.

[Means for solving problems]

The optical disk inspection device of the present invention includes a spindle that holds and controls the central axial center of the optical disk, and a spindle that is located on the outer periphery of the optical disk and is moved in the direction of the center of the optical disk by a first control motor. a uniaxial table, the lower surface of which is fixed on the uniaxial table, and a second control motor that moves in an arc in a direction perpendicular to the movement axis of the uniaxial table, with the height of the lower surface of the optical disk being the height of the rotation center axis; a primary swivel table, a lower surface of which is fixed to the upper surface of the primary swivel table, and an optical head mounting portion on the upper surface; and,
The table includes a secondary swivel table that moves in an arc with the height of the center axis of rotation aligned.

〔Example〕

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

FIG. 1 is a perspective view including an embodiment of the present invention.

The optical disk inspection apparatus shown in FIG. 1 includes an optical head 2, a spindle 3, a uniaxial table 5, a primary swivel table 7, a secondary swivel table 9, and a head mounting section 11. be done.

Next, the operation will be explained.

First, the rotation control motor 4 is activated to rotate the optical disk 1 held on the spindle 3 at a predetermined number of rotations. Next, the first control motor 6 is operated to move the optical head 2 mounted on the uniaxial table 5.
is moved to the outer circumferential position of the recording surface of the optical disc 1.

Next, the optical disk 1 is irradiated with a laser beam from the optical head 2, and while the reflected light is measured, the second control motor 8 of the first swivel table 7 and the second
The third control motor 10 of the swivel table 9 is activated. Here, the second control motor 8 and the third control motor 10 are operated at a position where the power of the reflected laser beam reaches its maximum value, that is, the optical axis of the laser beam irradiated from the optical head is directed toward the surface of the optical disk 1. It stops at the position where it is entered at a right angle.

Next, the first control motor 6 is operated to move the uniaxial table 5 toward the center of the optical disk 1 while inspecting various characteristics of the optical disk 1 and the optical head 2.

Next, when the optical head 2 reaches the innermost circumferential position of the recording surface of the optical disk 1, the inspection ends, and the first control motor 6 is rotated in the reverse direction to return the optical head 2 to its original position.

〔Effect of the invention〕

The optical disk inspection device of the present invention is equipped with a primary swivel table and a secondary swivel table that can automatically tilt the optical head both in the direction of the center of the optical disk and in the direction perpendicular thereto. Since various characteristics can be inspected by making the optical axis of the emitted laser beam perpendicular to the recording surface of the optical disk, highly reliable inspection results can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view including an embodiment of the present invention;
The figure is a perspective view including a conventional example. 1... Optical disk, 2... Optical head, 3...
Spindle, 5... Single axis table, 7... Primary swivel table, 9... Secondary swivel table, 11... Head mounting portion.

Claims (1)

[Claims] 1. A spindle that holds and controls the central axial center of the optical disk, a uniaxial table located on the outer periphery of the optical disk and moved in the direction of the optical disk's center by a first control motor, and a spindle mounted on the uniaxial table. a primary swivel table whose lower surface is fixed and which is moved by a second control motor in an arc in a direction perpendicular to the movement axis of the one-axis table, with the height of the lower surface of the optical disk as the height of the rotation center axis; The lower surface is fixed to the upper surface of the swivel table, and the upper surface has an attachment part for the optical head, and is controlled by a third control motor to be perpendicular to the arc center axis of the primary swivel table and to match the height of the rotation center axis. 1. An optical disk inspection device comprising: a second swivel table that moves in an arc.