CN1348174A - Optical apparatus - Google Patents
Optical apparatus Download PDFInfo
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- CN1348174A CN1348174A CN 01123691 CN01123691A CN1348174A CN 1348174 A CN1348174 A CN 1348174A CN 01123691 CN01123691 CN 01123691 CN 01123691 A CN01123691 A CN 01123691A CN 1348174 A CN1348174 A CN 1348174A
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Abstract
An optical device which is used in the initializing device for the phase transition type optical disk includes: an optical system which has mirror surface parts 26a and 26b consisting of a reflecting material oppositely arranged across the optical axis of the optical device in order to reflect a plurality of times an incident laser beam which crystallizes the recording layer of the optical disk 20 to initialize the recording layer; and a rotating means which rotates the mirror surface parts 26a and 26b around the axis parallel to the optical axis. The mirror surface parts 26a and 26b are arranged around the optical axis at a prescribed tile of &theta. To provide an initializing device capable of suitably changing, in accordance with an initializing condition, the shape of a laser beam image which is radiated onto the recording surface of a phase transition type optical disk.
Description
Technical field
The present invention relates to a kind of optical devices, particularly relate to a kind of can being used for the video disc recording layer of phase-change type is carried out initialization, on the recording layer treated side of CD, from comprising the optical devices that laser as the ejaculations such as optical generator of the semiconductor laser of light source becomes desirable projection of shape (below, be called imaging).
Technical background
Figure 13 is the vertical view that expression one example is used the optical devices in the apparatus for initializing of the phase-change optical disk in the past that constitutes the technology of the present invention background; Figure 14 is its front view; The enlarged drawing of the luminous shape of Figure 15 laser that to be expression penetrate from the semiconductor laser as the light source of Figure 13 and optical devices shown in Figure 14; The enlarged drawing of the image formation state when Figure 16 is the recording layer of this laser radiation of expression to cd side.
These optical devices 1 in the past have the optical generator 3 of the semiconductor laser (not representing) that comprises as light source in Figure 13, Figure 14 in its part.The semiconductor laser of not expressing in Figure 13, Figure 14 has and semiconductor laser identical construction shown in Figure 2.In these optical devices 1, between optical generator 3 and CD 9, form the optical system that collimation lens 5 and collector lens 7 are set with given interval.Its formation is: make the laser that penetrates from optical generator 3, as Figure 15 and shown in Figure 16, for example wide be about 1 μ m, on the long record surface that directly projects to CD 9 for the luminous shape 4 on the semiconductor laser light-emitting area of several 10 μ m～several 100 μ m and heat-treat.
That is, these optical devices 1 in the past have the luminous shape 4 on as shown in figure 15 the semiconductor laser light-emitting area 2, and the emergent light that penetrates from optical generator 3 forms and the parallel laser 6 of luminous shape 4 Widths by collimation lens 5.And this parallel laser forms imaging with the identical shaped identical size of luminous shape approximation shown in Figure 15 by collector lens 7 as shown in figure 16 on the record surface of CD 9.And the laser of imaging can be used as CD being carried out the luminous energy (crystallization energy) that initialization uses.
But this optical devices 1 in the past are owing to the width of the imaging 8 of the laser on the recording layer that is radiated at CD 9 record surfaces is very narrow, so be easy to the influence of external disturbance such as being vibrated.
And, in the optical system of in the past optical devices 1, because the luminous shape of the imaging light spot form of the laser that penetrates from light source on 9 of CDs when penetrating is almost with shape with size, be laser beam on CD 9 recording layers with certain light intensity density so shine.In this case, be not easy to change the imaging luminous point that is radiated on 9 of the CDs.Therefore, in optical devices 1 in the past, be difficult to carry out initialization process effectively according to the initialization condition of CD 9 recording layers, for example be difficult to needs long period heating at leisure, the CD of the structure that cools off at leisure carries out initialization process effectively.
That is, in optical devices 1 in the past,, can only change the rotational speed of CD 9 and the laser intensity that penetrates from light source, and can't satisfy the condition of carrying out the initialized more specifically best heating of recording materials, cooling as initialization condition.
Therefore, fundamental purpose of the present invention is: the optical devices that a kind of laser imaging shape that can utilize initialization condition suitably to change to shine on the phase-change optical disk record surface is provided.
Summary of the invention
In order to solve above-described problem, constituting optical devices of the present invention is a kind of optical devices that use in the apparatus for initializing of phase-change optical disk, it is characterized in that: comprising: to implement initialized incident laser by the recording layer crystallization that CD is had and form repeatedly reflection in order to make, folder is across the minute surface portion that is made of reflecting material of the optical axis subtend setting of optical devices; Is the rotary part that the center is rotated with making minute surface portion with the axle that is parallel to optical axis.
And optical devices of the present invention also have following feature: described laser penetrates from the end face of semiconductor laser, minute surface portion be set at described optical axis around and have a given inclination angle.
In optical devices of the present invention, the spread angle of semiconductor laser diffusion light beam is on the face that comprises with the pn faying face axle parallel to active layer and comprise on the face of perpendicular axle and have different anisotropy.
Described optical devices of the present invention especially are arranged under the effect of minute surface portion of optical axis both sides in subtend, after the laser that penetrates from semiconductor laser is reflected, can form the imaging shape with desired size on cd side.
Utilize the present invention 1 optical devices, particularly, can on cd side, irradiate the imaging shape that has to sizing utilizing folder after the effect of the minute surface portion of optical axis subtend setting has been reflected by the semiconductor laser emitted laser.
Utilize the present invention 2 optical devices, particularly with given degree of tilt come minute surface portion be arranged on optical axis around.Therefore, between minute surface portion, reflect by making by the laser between the minute surface portion of subtend setting, just can be to direction diffusion perpendicular to the pn faying face.At this moment, by increasing the inclination angle, just can increase the width of the imaging luminous point that shines on the cd-rom recording surface.
Below, by the reference accompanying drawing embodiments of the invention are elaborated, come further clear and definite the above purpose of the present invention, other purposes, feature and advantage.
Description of drawings
Fig. 1 is the stereographic map of expression one embodiment of the present of invention.
Fig. 2 is the stereographic map that expression one example is applicable to semiconductor laser embodiment illustrated in fig. 1.
Fig. 3 is the synoptic diagram of expression optical system major part embodiment illustrated in fig. 1, (A) is front view, (B) is vertical view, (C) is side view.
Fig. 4 is the major part enlarged drawing of the luminous shape of the laser that penetrates from the semiconductor laser of the embodiment shown in Fig. 1 and Fig. 3 etc. of expression.
Fig. 5 is illustrated in the illustrated embodiments such as Fig. 1 and Fig. 3, the major part enlarged drawing of the imaging shape the during recording layer of laser radiation to cd side.
Fig. 6 is the synoptic diagram of expression other embodiments of the invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Fig. 7 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Fig. 8 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Fig. 9 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Figure 10 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Figure 11 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Figure 12 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the major part enlarged drawing of its imaging shape of expression.
Figure 13 is that expression one example is used at the vertical view as the optical devices in the apparatus for initializing of the phase-change optical disk in the past of the technology of the present invention background.
Figure 14 is the front view of optical devices in the past shown in Figure 13.
The enlarged drawing of the luminous shape of Figure 15 laser that to be expression penetrate from the semiconductor laser as the light source of Figure 13 and optical devices in the past shown in Figure 14.
Figure 16 is illustrated in Figure 13 and the optical devices in the past shown in Figure 14, the enlarged drawing of the image formation state the during recording layer of laser radiation to cd side.
Below, the simple declaration symbol.
The 10-optical devices, 12-light generation portion, 14-collimation portion, 16-laser beam adjustment part, 18-light collecting part, the 20-phase-change optical disk, 22-semiconductor laser, the luminous shape of 24-semiconductor laser illuminating part, 26-level crossing, 26a, 26b-minute surface portion, 28-imaging shape, θ-inclination angle.
Embodiment
Below, with reference to accompanying drawing embodiments of the invention are elaborated.
Fig. 1 is the stereographic map of expression one embodiment of the present of invention, Fig. 2 is the stereographic map that expression one example is applicable to the semiconductor laser of optical devices embodiment illustrated in fig. 1, Fig. 3 is the synoptic diagram of expression optical system major part embodiment illustrated in fig. 1, (A) be front view, (B) being vertical view, (C) is side view.
The optical devices 10 of present embodiment are at the recording layer crystallization by phase-change optical disk is had, carry out the optical devices that use in the apparatus for initializing of initialization process, for example, as Fig. 1 and shown in Figure 3, have by light generation portion 12, collimation portion 14, laser beam adjustment part 16, light collecting part 18 and phase-change optical disk 20 are provided with the optical system that forms with given being spaced.At this moment, the axle center of collimation portion 14, laser beam adjustment part 16 and light collecting part 18 and the laser beam axis that penetrates from light generation portion 12 are arranged on the same axis.
In the present embodiment, collimation portion 14 is made of the collimation lens, and light collecting part 18 is made of object lens.
Laser beam adjustment part 16 comprises the maintenance body 17 of maintenance specular surface body 26 described later, keeps body 17 for example can be made of columned going barrel.And keeping body 17 to utilize can be that the rotary part that the center is rotated forms with the axle that is parallel to optical axis, can carry out suitable rotation.And in keeping body 17, the end to end from this direction of principal axis is provided with the level crossing 26 that section is a rectangle.
In the optical devices 10 of present embodiment, at first, from the semiconductor laser 22 ejaculation laser of light generation portion 12, then by collimation portion 14.At this moment, as previously discussed, because the luminous shape 24 of semiconductor laser 22 illuminating parts has the length of several 10 μ m～several 100 μ m on the direction of principal axis that is parallel to the pn faying face, the length that on the direction of principal axis vertical, has about 1 μ m with the pn faying face, therefore, though form directional light on the direction of principal axis parallel with the pn faying face, formation has the laser beam of given spread angle on the direction of principal axis vertical with the pn faying face.
And, also pass through by the laser after the collimation portion 14 between the 26a of minute surface portion and 26b of the subtends setting in the laser adjustment part 16.At this moment, because laser forms reflection between 26a of minute surface portion that tilts with given inclination angle [theta] and 26b, so laser is spread on the direction vertical with the pn faying face.
And, passed through laser behind the laser adjustment part 16 by light collecting part 18 optically focused, be radiated on the record surface of phase-change optical disk 20 as imaging shape 28 with desirable size and shape.Then, make the recording layer crystallization of 20 of phase-change optical disks, implement initialization.
That is, imaging shape 28 is compared with the luminous shape 24 of semiconductor laser 22 illuminating parts, can increase the length with pn faying face vertical direction, in the present embodiment, can increase the width of imaging shape 28.Therefore, can make laser imaging in the shape that Width changes with light intensity.Therefore, the recording layer crystallization that phase-change optical disk 20 is had that can pass is implemented initialized best luminous energy (crystallization energy).
Fig. 6 is the synoptic diagram of expression other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.In the present embodiment, compare with above-described embodiment, its difference is that the 27a of minute surface portion, 27b form towards optical axis one side-prominent state with the subtend from level crossing 26.And the maintenance body 17 of laser beam adjustment part 16 has and can construct at the son of cutting apart that cutting part 30 is cut apart.And present embodiment is also same with described embodiment, and being provided with of the 27a of minute surface portion, 27b forms desirable inclination angle [theta].At this moment, shown in Fig. 6 (B), as reference field, subtend is provided with 27a of minute surface portion and 27b on the position that with the optical axis is inhour rotation θ angle, center the face parallel with the pn faying face of semiconductor laser 22 and the face that comprises optical axis.
Fig. 7 is the synoptic diagram of expression another other embodiment of the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment is compared with embodiment shown in Figure 6, and its difference is: the maintenance body 17 of laser beam adjustment part 16 is formed cylindric, and side face 32 is provided with level crossing 26 within it.
Fig. 8 is the synoptic diagram of another other embodiment of expression the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment is compared with above-described each embodiment, and difference is: use cylinder mirror 34 to replace level crossing.In this case, the maintenance body 17 of laser beam adjustment part 16 is formed cylindric, and cylinder mirror 34 is set therein.Therefore, the 36a of minute surface portion, 36b are formed curve form.And shown in Fig. 8 (B), cylinder mirror 34 is set at given distance and departs from the position with the central shaft of the maintenance body 17 of the concentric laser beam adjustment part 16 of optical axis.And, in the present embodiment, be not that cylinder mirror 34 is obliquely installed with inclination angle [theta], but folder is every optical axis and parallelly with optical axis come the subtend setting.
Fig. 9 is the synoptic diagram of another other embodiment of expression the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment and embodiment comparison shown in Figure 8, its difference is: the maintenance body 17 of laser beam adjustment part 16 is formed cylindric, and dual cylinder mirror 42 is set in the empty therein portion 40.This dual cylinder mirror 42 for example by transversely arranged 2 cylinder mirrors are set and one are partially overlapped constitute.Therefore, make the 42a of minute surface portion, 42b folder every optical axis and parallel, two one subtend settings over the ground with optical axis.And dual cylinder mirror 42 is supported in the hollow bulb 40 that keeps body 17 by the support portion 41 that is arranged on the inner peripheral surface that keeps body 17.
Figure 10 is the synoptic diagram of another other embodiment of expression the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment and above-described each embodiment compare, and its difference is: be with given inclination angle [theta] oval shape mirror 46 to be set.At this moment, the maintenance body 17 of laser beam adjustment part 16 forms cylindric, and the support chip 45 by being provided with on the side face within it is arranged on oval shape mirror 46 in the hollow bulb 44.So in the present embodiment, the 46a of minute surface portion, 46b are formed elliptoid curved face part.
Figure 11 is the view of another other embodiment of expression the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment and the above each embodiment compare, and its difference is: it is that 45 sections of spending are the level crossing 50 of plane of refraction 50a, the 50b of V word shape that the subtend setting has as the refraction angle, makes it folder every optical axis and parallel with optical axis.In this case, plane of refraction 50a, 50b have the function as the minute surface portion of level crossing 50.
Figure 12 is the synoptic diagram of another other embodiment of expression the present invention, (A) is front view, (B) is side view, (C) is the main position enlarged drawing of its imaging shape of expression.Present embodiment and embodiment comparison shown in Figure 11, its difference is: shown in Figure 12 (B), will have the refraction angle is that 45 sections of spending are the level crossing 50 transversely arranged settings of plane of refraction 50a, the 50b of V word shape.
In the above each embodiment, particularly as Fig. 1, Fig. 3, Fig. 6, Fig. 7, shown in Figure 10, by changing inclination angle [theta], just can suitably change the disperse state of imaging shape on Width of imaging on 20 of phase-change optical disks.And, as Fig. 8, Fig. 9, Figure 11, shown in Figure 12, by being the alteration of form of the minute surface portion of subtend plane and even the curved surface shape, the laser that just can make output changes on the direction of the direction vertical with chip/vertical with the pn faying face, just can change the distribution of its light intensity.
In described each embodiment, constitute the minute surface portion of reflecting surface, its mother metal can use reflecting materials such as aluminium, glass, plastics, forms minute surface portion by with methods such as mirror-finish cuttings mother metal being made minute surface.Perhaps, form minute surface portion by films such as AM aluminum metallization on the mother metal surface.
Utilize the present invention, just can obtain suitably to change the optical devices of the laser imaging shape that is radiated on the phase-change optical disk record surface according to initialization condition.So, in optical devices of the present invention, can be set at heating, cooling condition to the initialization condition of phase-change optical disk to the best of recording materials.That is to say,, just can obtain the higher record surface of more uniform reliability through after the initialization process.
Claims (2)
1. optical devices are used for the apparatus for initializing of phase-change optical disk, it is characterized in that: comprising:
To implement initialized incident laser by the recording layer crystallization that described CD is had and repeatedly reflect in order to make, folder across the optical axis subtend setting of described optical devices, by minute surface portion that reflecting material constituted;
Can make described minute surface portion is the rotary part that the center is rotated with the axle that is parallel to described optical axis.
2. optical devices according to claim 1 is characterized in that:
Described laser penetrates from the end face of semiconductor laser;
Described minute surface portion is set at around the described optical axis with given degree of tilt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000279946 | 2000-09-14 | ||
| JP2000279946A JP3463261B2 (en) | 2000-09-14 | 2000-09-14 | Optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1348174A true CN1348174A (en) | 2002-05-08 |
Family
ID=18764871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01123691 Pending CN1348174A (en) | 2000-09-14 | 2001-09-11 | Optical apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3463261B2 (en) |
| CN (1) | CN1348174A (en) |
-
2000
- 2000-09-14 JP JP2000279946A patent/JP3463261B2/en not_active Expired - Fee Related
-
2001
- 2001-09-11 CN CN 01123691 patent/CN1348174A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP3463261B2 (en) | 2003-11-05 |
| JP2002092989A (en) | 2002-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |