CN100339681C - Optical disk detecting device - Google Patents

Abstract

The present invention relates to a detection device of an optical disk sheet, which is used for detecting whether an optical disk sheet is deformed or not. The detection device of an optical disk sheet comprises a bearing seat, a light source, a diamond mirror, a light sensor and a display screen, wherein the optical disk sheet is carried on the bearing seat, the light source is adjacently arranged on the bearing seat and positioned below the optical disk sheet, and emits a light ray, the diamond mirror is positioned between the optical disk sheet and the light source, the light ray penetrates through the diamond mirror and irradiates the optical disk sheet, the light ray reflected by the optical disk sheet is then refracted by the diamond mirror, and the light sensor carries out analyses after receiving the light ray refracted by the diamond mirror. Compared with the prior art, the detection device of an optical disk sheet of the present invention has the advantages that the distance between the light source and the optical disk sheet is shortened, the volume of the detection device of an optical disk sheet is dwindled by using the refraction of the diamond mirror, and furthermore, the required space cost of mechanical devices is reduced; simultaneously the detection device of an optical disk sheet of the present invention can detect out whether the optical disk sheet is distorted or deformed, and furthermore, the percent of pass of products is increased.

Description

Optical disk detecting device

Technical field

The present invention is about a kind of optical disk detecting device, and is especially a kind of in order to detect the pick-up unit whether discs is out of shape.

Background technology

Along with information and multimedia arriving from generation to generation, people also constantly increase for the storage density of Storage Media and the demand of capacity.Traditional Storage Media can be divided into two big classes haply, is respectively magnetic recording medium and optical recording media.Be to preponderate in the market with optical recording media, its comprise CD-ROM (CD-ROM), writable disposable type CD (CD-R), rewritable type CD (CD-RW), read-only type Video CD (DVD-ROM), writable disposable type Video CD (DVD-R), rewritable formula Video CD (DVD-RW, DVD+RW) and dynamic random memory Video CD (DVD-RAM) or the like.

With existing single-surface double-layer DVD-R discs 10 is example, and as shown in Figure 1, it contains one first substrate 11, one first record lamination (first recording stack, L ₀) 12, one wall 13, one second record lamination (second recording stack, L ₁) 14, and one second substrate 15.Wherein, first record lamination (first recording stack, the L ₀) 12 and second record lamination (second recording stack, the L ₁) 14 be coated on the data face of first substrate 11 and second substrate 15, and wall 13 is interposed between the first record lamination 12 and the second record lamination 14.

As shown in Figure 1, when data write or reads, laser light can be passed first substrate 11 and be focused on the first record lamination 12, or passed wall 13 to focus on the second record lamination 14.That is to say that laser light can be sent the light of two kinds of different capacities, to focus on respectively on the different record laminations.

Wherein, the manufacturing of substrate (for example first substrate 11, and second substrate 15) is penetrated board with the plastic raw materials utilization and is come moulding, it is gone ahead of the rest plastic raw materials behind the heating and melting, utilize suitable speed and pressure again, the molten plastic quantitative filling is gone in the mould, through the pressurization cooling curing, take out plastic product with suitable pushing method again.And make the substrate of finished product, when entering the discs processing procedure, may carry out the intensification or the cooling of environment because of the needs of processing procedure again.Therefore, under the cyclic process through heating and cooling, the substrate easy deformation makes the shape warpage out-of-flatness of discs, and then causes the quality of discs to descend.

As shown in Figure 2, in order to keep the quality of discs, then need to utilize optical disk detecting device to come the measuring light disc whether to be out of shape.In the prior art, optical disk detecting device 20 has a compact disk sheet placing seat 21, a light source 22, a level crossing 23, a sensor 24 and a display 25.Wherein, discs 26 is positioned on the compact disk sheet placing seat 21.Light by light source 22 is sent after level crossing 23 reflections, exposes to discs 26, through discs 26 light reflected, then reflexes to sensor 24 through level crossing 23 again.And after sensor 24 receives light, then carry out after the computational analysis to judge whether discs 26 has warpage.At last, by display 25 testing result appears again.

Shown in Fig. 3 A and Fig. 3 B, sensor 24 utilizes the discs 26 ' of distortion warpage, and the normal N of its incident light is offset an angle beta to normal N ', and make the emergent light angle after the reflection can be offset 2 β.And different angular deflections, the distance that causes sensor 24 to record is different, via computational analysis, can judge then whether discs 26 has the phenomenon of distortion warpage.

Please refer to Fig. 2 again, the optical disk detecting device 20 of prior art, light source 22 are arranged at a side of optical disk detecting device 20, and be far away apart from discs 26, thus cause the volume of optical disk detecting device 20 bigger, and then increased the needed space of plant equipment.This is undoubtedly a kind of increase of equipment cost for manufacturer.

Because the problems referred to above, this case inventor urgently thinks a kind of " optical disk detecting device " that can solve the big problem of existing optical disk detecting device volume because of in this.

Summary of the invention

Purpose of the present invention is for providing a kind of optical disk detecting device, and it can reduce the needed volume of optical disk detecting device.

For reaching above-mentioned purpose, according to optical disk detecting device of the present invention, whether be out of shape in order to detect a discs, it is characterized in that, comprise:

One load bearing seat, it carries this discs, and this load bearing seat has a rotating mechanism makes this discs rotation;

One light source, it is adjacent to this load bearing seat, and is positioned at this discs below, and sends a light;

One base, this light source are arranged on this base, and the adjacent setting with the load bearing seat level of this base makes the space close proximity of this light source and discs;

One water chestnut mirror, it is between this discs and this light source, and this water chestnut mirror of the light penetration of this light source also exposes to this discs, and this light of this discs reflection refracts to an optical sensor via this water chestnut mirror again, and it receives this light after the refraction, and analyzes.

In addition, another feature of the present invention is, more comprises a display screen, and itself and this optical sensor links.

From the above, optical disk detecting device of the present invention, light source is adjacent to load bearing seat, and utilizes a water chestnut mirror to replace level crossing of the prior art, to reduce the volume of optical disk detecting device.

Compared with prior art, optical disk detecting device of the present invention can shorten the distance of light source and discs, utilizes the refraction of water chestnut mirror again, makes the volume energy of optical disk detecting device dwindle, and then has reduced the required space cost of plant equipment.Moreover, can have portable base under the light source, so that optical disk detecting device can detect any point on the discs.In addition, optical disk detecting device of the present invention can detect discs whether warpage, distortion, thus can check on for the quality of product, and then increase the qualification rate of shipment product.

Description of drawings

Fig. 1 is the structural representation of known single-surface double-layer DVD-R discs;

Fig. 2 is the synoptic diagram of known optical disk detecting device; And

Fig. 3 A and 3B are the synoptic diagram in the portions of light path of known optical disk detecting device;

Fig. 4 is the synoptic diagram of optical disk detecting device of the present invention;

Fig. 5 is the synoptic diagram in the portions of light path of optical disk detecting device of the present invention; And

Fig. 6 is the synoptic diagram of the warpage angle calculation of optical disk detecting device of the present invention.

Symbol description among the figure:

10 single-surface double-layer DVD-R discs

11 first substrates

12 first record laminations

13 walls

14 second record laminations

15 second substrates

20 optical disk detecting devices

21 compact disk sheet placing seats

22 light sources

23 level crossings

24 sensors

25 displays

26 discs

The discs of 26 ' distortion warpage

30 optical disk detecting devices

31 load bearing seats

311 rotating mechanisms

32 light sources

321 light

33 water chestnut mirrors

34 optical sensors

35 discs

36 bases

37 display screens

L ₀The first record lamination

L ₁The second record lamination

β discs warpage angle

R water chestnut mirror is to the distance of optical sensor

The light that P does not have a warpage discs is incident to the position of optical sensor

P ' has the light of warpage discs to be incident to the position of optical sensor

The N normal

Normal after the N ' skew

Embodiment

Hereinafter with reference to relevant drawings, the optical disk detecting device according to preferred embodiment of the present invention is described.

Discs of the present invention comprise CD-ROM (CD-ROM), writable disposable type CD (CD-R), rewritable type CD (CD-RW), read-only type Video CD (DVD-ROM), writable disposable type Video CD (DVD-R), rewritable formula Video CD (DVD-RW, DVD+RW) and dynamic random memory Video CD (DVD-RAM) or the like.

As shown in Figure 4, optical disk detecting device 30 of the present invention comprises a load bearing seat 31, a light source 32, a water chestnut mirror 33 and an optical sensor 34.Whether optical disk detecting device 30 is out of shape or warpage in order to detect a discs 35.

Load bearing seat 31 carrying disc sheets 35, load bearing seat 31 have a rotating mechanism 311 rotates discs 35 in testing process.

Light source 32 is adjacent to load bearing seat 31, and is positioned at discs 35 belows, and sends a light 321.In the present embodiment, light source 32 is the semiconductor red laser.

In the present embodiment, optical disk detecting device 30 more comprises a base 36, and light source 32 is arranged on the base 36.Base 36 is removable, to adjust the position of light source 32 with respect to discs 35.

Water chestnut mirror 33 is between discs 35 and light source 32, and light 321 penetrates water chestnut mirror 33 and exposes to discs 35.Therefore, the light 321 that is sent when light source 32, penetrated water chestnut mirror 33 and shone when discs 35, utilize base 36 can adjust the position that light 321 is incident in discs 35, add the rotating mechanism 311 on the load bearing seat 31, therefore light 321 can be incident to the arbitrfary point on the discs 35, to detect.

Please refer to Fig. 4 and Fig. 5, light 321 promptly is reflected after exposing to discs 35.After the light 321 that is reflected by discs 35 reenters water chestnut mirror 33, refracted to optical sensor 34 by water chestnut mirror 33 again.

Optical sensor 34 receives the light 321 after the refraction, to carry out the warpage angle of computational analysis discs 35.Wherein, optical sensor 34 can be a charge coupled cell or a position transducer.In the present embodiment, optical sensor 34 is a position transducer, can be by the discs of no warpage and the discs of warpage (shown in the dotted line), the position difference (P and P ') of the light that is incident to optical sensor 34 321 after water chestnut mirror 33 reflects, carry out computational analysis, to obtain the angle of discs 35 warpages.

As Fig. 5 and shown in Figure 6, because the distance R of water chestnut mirror 33 and optical sensor 34 is known, when suitable hour of the warpage angle of discs, PP ' arc length approximated its chord length (being the distance of P point to P ' point), shown in following formula:

$\stackrel{\‾}{{\mathrm{PP}}^{\′}}={\mathrm{PP}}^{\′}\⫬=\frac{2\mathrm{\πR}\×2\mathrm{\β}}{360}$

Therefore promptly, $\mathrm{\β}=\frac{\stackrel{\‾}{{\mathrm{PP}}^{\′}}\×360}{2\mathrm{\πR}\×2}$

After obtaining discs 35 discs warpage angle betas, can utilize the size of warpage angle, be used as the control point of QC.When the angle of discs warpage during greater than allowable range, the user can be considered as defective products with discs 35, thus, can guarantee the quality of discs 35.

In the present embodiment, optical disk detecting device more comprises a display screen 37, and itself and optical sensor 34 link, and the result after feasible the analysis is shown on the screen 37, is convenient to the user and inspects.

In sum, optical disk detecting device of the present invention, light source is adjacent to load bearing seat, and utilizes a water chestnut mirror to replace level crossing of the prior art, to reduce the volume of optical disk detecting device.Compared with prior art, optical disk detecting device of the present invention can shorten the distance of light source and discs, utilizes the refraction of water chestnut mirror again, makes the volume energy of optical disk detecting device dwindle, and then has reduced the required space cost of plant equipment.Moreover, can have portable base under the light source, so that optical disk detecting device can detect any point on the discs.In addition, optical disk detecting device of the present invention can detect discs whether warpage, distortion, thus can check on for the quality of product, and then increase the yield of shipment product.

The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.

Claims (6)

1. whether an optical disk detecting device is out of shape in order to detect a discs, it is characterized in that, comprises:

One load bearing seat, it carries this discs, and this load bearing seat has a rotating mechanism makes this discs rotation;

OneLight source, it is adjacent to this load bearing seat, and is positioned at this discs below, and sends a light;

One base, this light source are arranged on this base, and the adjacent setting with the load bearing seat level of this base makes the space close proximity of this light source and discs;

One water chestnut mirror, it is between this discs and this light source, and this water chestnut mirror of the light penetration of this light source also exposes to this discs, and this light of this discs reflection refracts to an optical sensor via this water chestnut mirror again, and it receives this light after the refraction, and analyzes.

2. optical disk detecting device as claimed in claim 1 is characterized in that, more comprises a display screen, and itself and this optical sensor links.

3. optical disk detecting device as claimed in claim 1 is characterized in that, this base is a removable frame, to adjust the position of this light source with respect to this discs.

4. optical disk detecting device as claimed in claim 1 is characterized in that, this light source is the red laser of semiconductor.

5. optical disk detecting device as claimed in claim 1 is characterized in that, this optical sensor is a charge coupled cell.

6. optical disk detecting device as claimed in claim 1 is characterized in that, this optical sensor is a position transducer.

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