CN101477814A - Laser assembly device - Google Patents
Laser assembly device Download PDFInfo
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- CN101477814A CN101477814A CNA2009100086073A CN200910008607A CN101477814A CN 101477814 A CN101477814 A CN 101477814A CN A2009100086073 A CNA2009100086073 A CN A2009100086073A CN 200910008607 A CN200910008607 A CN 200910008607A CN 101477814 A CN101477814 A CN 101477814A
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- laser
- optical head
- assembly device
- optical axis
- lens
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Abstract
The invention provides a device for assembling a laser, which comprises the laser, a laser fixing bracket which is arranged for fixing the laser, positioning pinholes which are arranged on the laser fixing bracket at an opposite angle, an optical head sliding frame, an optical head collimating mirror which is arranged on the optical head sliding frame, receives the light diffuser sent by the laser, performs collimation to the light diffuser, and reflects the light diffuser to a collimator; a fixed jig of the optical head sliding frame which is used for fixing the optical head sliding frame; positioning pins of the laser which are pressed pneumatically to the positioning pinholes of the laser, the collimator which comprises a lens with a focal distance f, an information collection module which collects the deviation distance with Delta X of the light beam of the laser, and informs a calculation module of the deviation distance, the calculation module which calculates an angle of Theta, and the optical axis direction has the deviated angle of Theta from the standard direction according to the focal distance f and the deviation distance with Delta X; and an adjusting device which adjusts the positioning pins of the laser according to the deviated angle. The invention can realize the translational motion of the laser and the micro rotation of the laser body, thereby ensuring the precision of the information reading.
Description
Technical field
The invention belongs to optical storage field, relate in particular to a kind of laser assembly device.
Background technology
Along with the continuous development of optical storage technology, the requirement of the information of optical head being read precision improves constantly.The information of optical head reads precision except the craft precision that depends on each element, and is also closely related with optical head assembly precision in process of production.
Dual laser has higher requirement for plain shaft precision.The little deviation of laser instrument assembling in the optical head, promptly cause the large deviation of whole optical system optical axis direction, thereby directly influence every optical characteristics index of each optical element, the collimated light that sends as the optical head collimating mirror is with respect to the incident angle of object lens, the size of incident angle directly has influence on the image quality of object lens, produces many-sided harmful effect thereby the information of optical head is read precision.
Summary of the invention
In order to solve above-mentioned defective of the prior art, the present invention proposes a kind of laser assembly device.
A kind of laser assembly device comprises: laser instrument; Laser holder is disposed at fixing described laser instrument; The location pin hole becomes the diagonal angle to be arranged on the described laser holder; The optical head travelling carriage; The optical head collimating mirror is arranged on the described optical head travelling carriage, receives the diverging light that described laser instrument sends, and described diverging light is collimated, and incides collimator then; Optical head travelling carriage fixed jig is fixed described optical head travelling carriage; The laser instrument pilot pin, pneumatic suppressing on the pin hole of described location; Collimator comprises: lens, focal length are f; Information acquisition module, the deviation distance that collects laser beam is Δ X, and with described deviation distance notice computing module; Computing module according to focal distance f and deviation distance Δ X, calculates the angle θ that optical axis direction departs from reference direction; Regulating device is regulated described laser instrument pilot pin according to described deviation angle.
The present invention can realize the translation motion of laser instrument and the small rotation of laser bodies, has reached the effect that three dimensions is adjusted, and satisfies the high-precision requirement of dual laser optical axis direction fully.Assembly precision to the optical axis of optical head laser instrument detects and compensatory adjustment in real time, thereby has guaranteed the precision that information reads.
Description of drawings
Fig. 1 illustrates laser assembly device structural drawing in the prior art.
Fig. 2 illustrates another laser assembly device structural drawing in the prior art.
Fig. 3 illustrates laser assembly device structural drawing among the present invention.
Fig. 4 illustrates laser assembly device structural drawing in another embodiment of the present invention.
Fig. 5 illustrates the collimator structural drawing of laser assembly device among the present invention.
Fig. 6 illustrates the regulating device structural drawing of laser assembly device among the present invention.
Fig. 7 illustrates the embodiment of laser assembly device of the present invention.
Fig. 8 illustrates the front-view schematic diagram of laser holder in the embodiment of the invention.
Embodiment
For foregoing of the present invention is become apparent,, be described in detail with embodiment in conjunction with the accompanying drawings by contrasting existing technical matters.
The optical head laser optical axis is regulated and is mainly contained dual mode in the prior art.
Fig. 1 illustrates laser assembly device structural drawing in the prior art, comprise laser instrument, optical head travelling carriage and optical head travelling carriage fixed jig, laser instrument is provided with locating slot, and the optical head travelling carriage is provided with the laser instrument pilot hole/groove that is used with locating slot.
After optical head travelling carriage fixed jig is fixed the optical head travelling carriage, the locating slot on the laser instrument is corresponding with the laser instrument pilot hole/groove of optical head travelling carriage, cooperate to guarantee the basic demand of laser optical direction of principal axis by machinery.The laser instrument pilot hole/groove on the single use optical head travelling carriage of this mode and the locating slot of laser bodies guarantee, owing to the not equal reason of the error on the mechanical technology, the technologic error of laser bodies and assembly method, cause assembly precision low, the optical axis that does not far reach dual laser is regulated requirement.
Fig. 2 illustrates another laser assembly device structural drawing in the prior art, has increased laser holder, directions X adjuster bar, Y direction adjuster bar and Z direction adjuster bar on the basis of structure shown in Figure 1.
After optical head travelling carriage fixed jig is fixed the optical head travelling carriage, laser instrument is positioned in the laser holder, again laser holder is positioned in first laser instrument pilot hole/groove, first laser instrument pilot hole/groove is corresponding with second laser instrument pilot hole/groove on the optical head travelling carriage, cooperates to guarantee the basic demand of laser optical direction of principal axis by machinery.After finishing above-mentioned installation, regulate laser optical axis directions X, Y direction and Z direction respectively by directions X adjuster bar, Y direction adjuster bar and Z direction adjuster bar.This mode is to reach the requirement that optical axis is regulated for single wavelength laser, and because dual laser has the angle collocation requirement of strictness to the position of two luminous points, can't finish the requirement of the angular turn adjusting of laser bodies, the optical axis that is not suitable for dual laser is regulated.
The present invention is directed to the high-precision requirement of dual laser optical axis, design corresponding mechanism, realized the rotation of the minute angle of the translation of laser instrument XY direction and laser bodies, thereby guaranteed the precision that information reads.
Describe the present invention in detail below in conjunction with drawings and Examples.
Fig. 3 illustrates laser assembly device structural drawing among the present invention.Comprise optical head travelling carriage, optical head travelling carriage fixed jig, laser instrument, laser holder, laser instrument pilot pin, location pin hole, optical head collimating mirror, collimator and regulating device.
The optical head collimating mirror is arranged on the optical head travelling carriage, optical head travelling carriage fixed jig is fixed the optical head travelling carriage, the laser instrument pilot pin is pneumatic to be suppressed on the location pin hole that is arranged on laser holder, pin hole paired angle in described location is provided with, and laser instrument is fixed on this laser holder.When dual laser sent diverging light, the optical head collimating mirror received diverging light, made the diverging light by the optical head collimating mirror become collimated light, and the direction of collimated light light beam is the optical axis direction of dual laser, and the collimated light light beam enters collimator.When collimator receives laser beam, calculate the angle θ that this optical axis direction departs from reference direction, by regulating device according to this angular adjustment laser instrument pilot pin, because this laser instrument pilot pin is connected with the location pin hole, and the location pin hole is arranged on the laser holder, and the laser instrument that drives thus in the laser holder has been realized translation motion.Because the paired angle of the location pin hole on laser holder is provided with, then regulating device has produced moment in adjustment process, thereby has realized the rotation of laser bodies minute angle.
Wherein, the process of calculating angle θ can be finished by following manner.The information acquisition module center that laser beam departs from collimator is Δ X, and the collimator combined focal length is f, can draw the angle that optical axis direction departs from reference direction: θ=arctan (Δ X/f) by following formula.
Fig. 4 illustrates laser assembly device structural drawing in another embodiment of the present invention, also comprises stationary installation.
Stationary installation is used for reaching predetermined standard time fixed laser fixed mount at the optical axis direction of laser instrument.This stationary installation can be a setscrew, also can be fixing glue, thus the fixedly position of dual laser optical axis and direction.
Fig. 5 illustrates the collimator structural drawing of laser assembly device among the present invention, comprises lens, information acquisition module and computing module.
The focal length of lens is f, and satisfies 75mm＜f＜150mm.Effective collection radius of information acquisition module is R
1,, should satisfy: 1.2mm＜R for the measurement range that makes collimator reaches the required build-up tolerance claimed range of objective lens for optical pickup
1＜2.7mm.The deviation distance that information acquisition module collects laser beam is Δ X, and with this deviation distance notice computing module.Computing module calculates the angle that optical axis direction departs from reference direction: θ=arctan (Δ X/f) according to focal distance f and deviation distance Δ X.
The present invention is directed to the accuracy requirement of dual laser optical axis direction, depart from the angle θ of reference direction according to given numerical range calculating correlation parameter and optical axis direction, thereby design the collimator of respective detection precision and range.
Preferably, the lens in the collimator of the present invention require the optical characteristics index set according to accuracy of detection, range etc., and optical aberration is proofreaied and correct.Described lens can comprise positive lens and negative lens.Described positive lens is away from information acquisition module, and described negative lens is near information acquisition module, and described positive lens, negative lens are D in the relative distance of optical axis direction
1And 15mm＜D
1＜65mm; The positive lens focal distance f
1Satisfy 50mm＜f
1＜70mm, the negative lens focal distance f
2Satisfy-70mm＜f
2＜-50mm.
To specify the computation process of above-mentioned parameter below.
Focal distance f for simple lens (positive negative lens)
x, the radius-of-curvature of establishing lens front and back curved surface is respectively: r
1, r
2Wherein radiation direction is to propagate from left to right, and when the center of curvature was positioned at the right side of lens curved surface, radius-of-curvature r value had been for just, otherwise was to bear.
The focal distance f of simple lens (positive negative lens)
x:
Wherein n is the refractive index of lens material.
Combined focal length f:
(D
1Be the distance between positive negative lens).
Effective collection radius R of information acquisition module
1: R
1≈ f θ
Max(θ wherein
MaxBe the angle range that requires).
Distance D between positive negative lens
1: according to effective collection radius R of above-mentioned information acquisition module
1, determine the combined focal length and the angle range of photosystem.Pass through the concrete focal length parameter of selected positive negative lens again, thereby calculate the distance D between positive negative lens
1
Fig. 6 illustrates the regulating device structural drawing of laser assembly device among the present invention, comprises X adjuster bar and Y adjuster bar.
The present invention can guarantee its precision by optical head travelling carriage and laser holder in the Z direction on mechanical technology, so kept X, the adjustment of Y direction.Adjust optical axis directions X and optical axis Y direction respectively according to described fleet angle, thereby the tangential movement of control laser holder is 0.02mm in the accessible resolution precision of axially-movable displacement.Because being suppressed by aerodynamic force (this area usual way), the location pin hole on adjusting laser instrument pilot pin and the laser holder is integral, when so either party regulates as X, Y adjuster bar, other direction is motionless, this moment is promptly at the different directions that forms on the XY plane on the mechanics, there are two power of differential seat angle to act on laser holder simultaneously, be rotating torque, the feasible whole rotation that produces minute angle of laser holder that comprises laser instrument.
Fig. 7 illustrates the embodiment of laser assembly device of the present invention.
Laser assembly device comprises optical head travelling carriage, optical head travelling carriage fixed jig, laser instrument, laser holder, optical head collimating mirror, collimator, laser instrument pilot pin, location pin hole, regulating device and stationary installation.Wherein, optical head travelling carriage fixed jig comprises first fixed guide, second fixed guide, and regulating device comprises X adjuster bar, Y adjuster bar, and collimator comprises semi-transparent semi-reflecting lens, positive lens, negative lens, information acquisition module and computing module.
First fixed guide and second fixed guide are fixed the optical head travelling carriage, because the difference in height of the major and minor axle of optical head travelling carriage to be measured on surface level is Δ
2, for the fixing of horizontal direction can be provided for the plane of reflection of objective lens for optical pickup, so first fixed guide and second fixed guide difference in height Δ on surface level
1Must satisfy: Δ
1=Δ
2
The first laser instrument pilot pin and the second laser instrument pilot pin are positioned the first location pin hole and the second location pin hole that laser holder becomes diagonal position respectively.The first location pin hole and the second location pin hole are arranged on the laser holder, and laser instrument is fixed on the laser holder.The optical head collimating mirror is arranged on the optical head travelling carriage, when the optical head collimating mirror receives the diverging light that dual laser sends, make diverging light become collimated light by the optical head collimating mirror, the direction of collimated light light beam is the direction of dual laser optical axis, and the collimated light light beam enters collimator.
Collimator adopts the lens of positive lens, negative lens combination, and positive lens is away from information acquisition module, and negative lens is near information acquisition module, and positive and negative lens are D in the relative distance of optical axis direction
1For the measuring accuracy that makes collimator is able to be reflected in significantly the slight variation of error in the build-up tolerance claimed range, should satisfy: 15mm＜D
1＜65mm.The positive lens focal length is f
1, the negative lens focal length is f
2, combined focal length is f.For the measurement range that makes collimator reaches the optical axis claimed range of optical head dual laser, should satisfy: 50mm＜f
1＜70mm ,-70mm＜f
2＜-50mm.Effective collection radius of information acquisition module is R
1,, should satisfy: 1.2mm＜R for the measurement range that makes collimator reaches the required build-up tolerance claimed range of objective lens for optical pickup
1＜2.7mm.When information acquisition module receives laser beam, if it is θ that optical axis direction departs from the reference direction angle, laser beam runout information acquisition module centre distance is Δ X, the collimator combined focal length is f, computing module calculates the angle that optical axis direction departs from reference direction: θ=arctan (Δ X/f), and offset signal is outputed on the monitor.
Adjust the laser instrument pilot pin by X adjuster bar and Y adjuster bar in real time according to the hot spot on the monitor screen, because this laser instrument pilot pin is connected with the location pin hole, and the location pin hole is arranged on the laser holder, drives laser instrument in the laser holder thus and has realized translation and rotatablely move.Be positioned at the center of monitor screen up to hot spot, finish this moment and adjust operation.Because laser holder and optical head travelling carriage cooperating mechanically, fleet angle can both be controlled in 30 minutes, and laser optical axis was regulated in 30 minutes.
When the optical axis direction of laser instrument reaches pre-provisioning request, use first setscrew and second setscrew that the stationkeeping of laser holder is got off, thereby guaranteed the position and the direction of dual laser optical axis.Fig. 8 shows the front-view schematic diagram of laser holder.
The present invention is directed to the required assembly precision and the convenience of adjusting operation of optical axis of optical head dual laser, the correlation parameter of collimation instrument has been made regulation, adopts high-precision spiral micrometer interlock XY adjuster bar simultaneously.The present invention has comprised the spiral micrometer interlock adjuster bar mechanism that the plain shaft precision of optical head laser instrument assembling is adjusted, cooperate the detection of collimator to the assembly precision of the optical axis of laser instrument, XY direction spiral micrometer interlock adjuster bar can be realized the translation of laser instrument XY direction and the diagonal orientation pin hole that cooperates laser holder, make laser bodies can realize the rotation of minute angle, reach the effect that three dimensions is adjusted, satisfied the high-precision requirement of dual laser optical axis direction fully.Thereby the assembly precision to the optical axis of optical head laser instrument detects and compensatory adjustment in real time, guarantees the precision that information reads.
Claims (9)
1. laser assembly device comprises:
Laser instrument;
Laser holder is disposed at fixing described laser instrument;
The location pin hole becomes the diagonal angle to be arranged on the described laser holder;
The optical head travelling carriage;
The optical head collimating mirror is arranged on the described optical head travelling carriage, receives the diverging light that described laser instrument sends, and described diverging light is collimated, and incides collimator then;
Optical head travelling carriage fixed jig is fixed described optical head travelling carriage;
The laser instrument pilot pin, pneumatic suppressing on the pin hole of described location;
Collimator comprises:
Lens, focal length are f;
Information acquisition module, the deviation distance that collects laser beam is Δ X, and with described deviation distance notice computing module;
Computing module according to focal distance f and deviation distance Δ X, calculates the angle θ that optical axis direction departs from reference direction;
Regulating device is regulated described laser instrument pilot pin according to described deviation angle.
2. laser assembly device according to claim 1 also comprises:
Stationary installation is used for fixing described laser holder when the optical axis direction of described laser instrument reaches pre-provisioning request.
3. laser assembly device according to claim 1, wherein:
The angle that described computing module calculating optical axis direction departs from reference direction is: θ=arctan (Δ X/f).
4. laser assembly device according to claim 1, wherein:
Described regulating device comprises X adjuster bar and Y adjuster bar, adjusts optical axis directions X and optical axis Y direction respectively according to described fleet angle, makes described laser instrument generation translation motion and makes described laser bodies produce small rotation.
5. laser assembly device according to claim 1, wherein:
Described optical head travelling carriage equates with the difference in height that described optical head travelling carriage fixed jig produces on surface level in the difference in height that produces on the surface level.
6. laser assembly device according to claim 1, wherein:
Effective collection radius R of described information acquisition module
1≈ f θ
Max, wherein, θ
MaxBe the angle range that requires.
7. as laser assembly device as described in the claim 6, wherein:
The described focal length of lens satisfies 75mm＜f＜150mm;
Effective collection radius of described information acquisition module is R
1, and 1.2mm＜R
1＜2.7mm.
8. as laser assembly device as described in claim 1 or 6, wherein:
Described lens comprise that focal length is f
1Positive lens and focal length be f
2Negative lens, described positive lens is away from described information acquisition module, described negative lens is near described information acquisition module, described positive lens, negative lens are D in the relative distance of optical axis direction
1, calculate D according to following formula
1:
9. as laser assembly device as described in the claim 8, wherein:
Described positive lens focal distance f
1Satisfy 50mm＜f
1＜70mm;
Described negative lens focal distance f
2Satisfy-70mm＜f
2＜-50mm;
Described positive lens, negative lens are at the relative distance D of optical axis direction
1Satisfy 15mm＜D
1＜65mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100086073A CN101477814A (en) | 2009-02-05 | 2009-02-05 | Laser assembly device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100086073A CN101477814A (en) | 2009-02-05 | 2009-02-05 | Laser assembly device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101477814A true CN101477814A (en) | 2009-07-08 |
Family
ID=40838507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100086073A Pending CN101477814A (en) | 2009-02-05 | 2009-02-05 | Laser assembly device |
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|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104207845A (en) * | 2014-09-05 | 2014-12-17 | 北京泰恒金光伟业光电科技有限公司 | Pulse laser therapeutic apparatus for prostatitis |
| CN108007353A (en) * | 2018-02-01 | 2018-05-08 | 深圳大学 | A kind of rotary laser contour measuring method, storage device and its measuring device |
| CN109141836A (en) * | 2018-10-31 | 2019-01-04 | 苏州深影光电科技有限公司 | Laser alignment light box test fixture and its test method |
| CN111007484A (en) * | 2019-12-27 | 2020-04-14 | 联合微电子中心有限责任公司 | Single line laser radar |
-
2009
- 2009-02-05 CN CNA2009100086073A patent/CN101477814A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104207845A (en) * | 2014-09-05 | 2014-12-17 | 北京泰恒金光伟业光电科技有限公司 | Pulse laser therapeutic apparatus for prostatitis |
| CN108007353A (en) * | 2018-02-01 | 2018-05-08 | 深圳大学 | A kind of rotary laser contour measuring method, storage device and its measuring device |
| CN108007353B (en) * | 2018-02-01 | 2023-11-21 | 深圳大学 | Rotary laser profile measuring method, storage device and measuring device thereof |
| CN109141836A (en) * | 2018-10-31 | 2019-01-04 | 苏州深影光电科技有限公司 | Laser alignment light box test fixture and its test method |
| CN111007484A (en) * | 2019-12-27 | 2020-04-14 | 联合微电子中心有限责任公司 | Single line laser radar |
| CN111007484B (en) * | 2019-12-27 | 2023-08-25 | 联合微电子中心有限责任公司 | Single-line laser radar |
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Open date: 20090708 |