CN1747014A - Objective lens package of optical picker and its sensing device - Google Patents
Objective lens package of optical picker and its sensing device Download PDFInfo
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- CN1747014A CN1747014A CN 200410054351 CN200410054351A CN1747014A CN 1747014 A CN1747014 A CN 1747014A CN 200410054351 CN200410054351 CN 200410054351 CN 200410054351 A CN200410054351 A CN 200410054351A CN 1747014 A CN1747014 A CN 1747014A
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- lens
- light
- optical sensor
- object lens
- pickup apparatus
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Abstract
A detection device used in assembling method of pair objective on optical picker consists of the second horizontal - moving unit for supporting the second lens and for moving it horizontally, the first horizontal - moving unit for doing the same thing for the first lens above the second one, collimating lens for converting light beam to be horizontal beam, laser beam source, pair objectives for shining light on the first and the second lens through collimating lens, vertical - moving unit for moving pair objective vertically and light transducer for measuring position of light focusing .
Description
[technical field]
The invention relates to and possess 2 lens, to record and play the invention of optical pickup apparatus that 2 lens of the optical pickup apparatus of optical record medium information signals such as CD, photon disk and light-card assemble the object lens assemble method.
[background technology]
All the time, optical record mediums such as so-called CD, photon disk and light-card are considered to the information signal recording medium always.And optical pickup apparatus be rayed (irradiation) with light source to these optical record mediums, write down or play the device of these optical record medium information signals.
Optical pickup apparatus diminishes the beam condenser footpath (Trail) of light harvesting on optical record medium by being provided with very greatly to the numerical aperture (NA) of object lens, can improve the density of optical record medium signal record.For example, the numerical aperture boundary of existing optical pickup apparatus is about 0.6.
As shown in Figure 1,2 lens 105 are made of following two parts: the 1st lens 102 of the light beam of light source (light beam) 101 that incident shutter portion 100 assembles; To 102 outgoing of the 1st lens, and the 2nd lens 104 that beam reflected is carried out incident on the signal recording surface (103a) of optical record medium 103.
Specifically, 2 lens 105 are made of following two parts: by the 1st 106 of incident light source light beam 101 with the outgoing beam of the 1st 106 of incident the 2nd 107 the 1st lens 102 that form to 104 outgoing of the 2nd lens; By the 3rd 108 of the outgoing beam of the 2nd 107 on incident the 1st lens 102 with the outgoing beam of the 3rd 108 of incident the 4th 109 the 2nd lens 104 that form to optical record medium 103 outgoing.Numerical aperture with 2 lens 105 of said structure can be more than 0.8.
Such as 2 lens 105, the 1 lens 102 thickness are that the thickness of the 1st 106 and the 2nd 107 interval L1, the 2nd lens 104 is interval L2 of the 3rd 108 and the 4th 109, and they are designed to the most satisfactory value respectively.And the 1st lens 102 and the 2nd lens 104 are made by the glass mold that has used golden mould.
And, 105 pairs of object lens of 2 lens with constitute by 1 lens different to object lens.For example, for the assembling of lens, need accurately determine the 1st lens 102 and the 2nd lens 104 positions.This is because according to the position that determines, receives difference and might exceed permissible range.
For instance, can decide the position by selecting the 1st 106, the 2 107, the 3 108, the 4 109 any 2.And, irrelevant with the lens thickness error all the time, such as getting device at interval is standard with the 3rd 108 interval L3 of the 2nd the 107 and the 2nd lens 104 of the 1st lens 102, the decision position.In optical pickup apparatus, include this device at interval of getting.
And for 2 lens 105, the boundary of receiving difference should be as far as possible little.The error requirements of the interval L3 of the lens thickness L2 of the lens thickness L1 of the 1st lens 102 and the 2nd lens 104 and the 1st lens 102 and the 2nd lens 104 is within number μ m.
Manage according to the weight of the glass nitre material (nitre material) that uses in the glass mold lens thickness to the 1st lens 102 and the 2nd lens 104, its error should be controlled at below several μ m.But this is very difficult thing for existing technology.Usually, make the lens thickness error of glass mold generally about ± 10 μ m.
And, such just as previously discussed, if error appears in the thickness of the lens of the 1st lens 102 and the 2nd lens 104, if with the 2nd 107 and the 3rd 108 interval L3 is that standard is assembled, the total length (full Long of 2 lens 105), that is, the 1st 106 and the 4th 109 interval can change along with the variation of error degree.If use like this, the receipts difference of 2 lens 105 might surmount permissible range.
And shown in Fig. 2 a and Fig. 2 b, if 104 pairs the 1st lens of the 2nd lens, 102 run-off the straight θ and eccentric d, the receipts difference that is easy to occur 2 lens 105 exceeds the problem of permissible range.
[summary of the invention]
The present invention is in order to address the above problem, its objective is to the user provides a kind of foozle with 2 lens self and have nothing to do, realizing minimized interval by set receiving difference, can effectively prevent the assemble method of contingent inclination and eccentric optical pickup apparatus between the 1st lens and the 2nd lens object lens.
To achieve these goals, the optical pickup apparatus that is included in the 2nd lens that are provided with in the medium and the 1st lens that are provided with on the 2nd lens top uses the assemble method to object lens to comprise following step, and as feature: use to comprise to the radiative light source of lens, with source emissioning light reflection and the optical sensor of measuring the reflected light position at interior determinator, for the light that makes light emitted is same position in the position that the reflected light of the 2nd lens bottom surface and reflected light on the 2nd lens focus in optical sensor, determine the position of the 2nd lens, and the 2nd entirety of lens package step of assembling; Finish after above-mentioned the 2nd entirety of lens package step, the 1st lens are positioned over the 2nd lens upper position, use focus adjusting device, the position that focuses in optical sensor for the reflected light of the reflected light that makes the 1st lens bottom surface, reflected light above the 1st lens and the 2nd lens is a same position, determines the 1st entirety of lens package step of the 1st lens position and assembling.
Here, above-mentioned optical sensor is to arrange the charge-coupled device (CCD) (CCD:Charge coupled device) that forms by photodiode to constitute.
On the other hand, the optical pickup apparatus of the 1st lens that are included in the 2nd lens that are provided with in the medium and are provided with on the 2nd lens top uses the determinator that uses in the assemble method to object lens to be made of following components, and as feature: support the 2nd lens, the 2nd horizontally moving device that the 2nd lens are moved horizontally; The 1st horizontally moving device that the 1st lens are moved at the upper level of the 2nd lens; The light source of irradiating laser light beam; The Beam Transformation of light emitted is become the collimation lens of horizontal light beam; To be mapped to by the illumination of collimation lens the 1st lens and the 2nd lens to object lens; Move up and down to object lens to object lens vertical moving device; The light of the 1st lens and the 2nd reflection from lens forms focal position by to object lens and collimation lens, can measure the optical sensor of light focal position.
Above-mentioned optical sensor is preferably arranged the charge-coupled device (CCD) that forms by photodiode and is constituted.
And, the said determination device also should be included in be provided with between optical sensor and the collimation lens by connecting the orifice plate that aperture forms.
The foozle that the invention provides a kind of and 2 lens self is irrelevant, realizes receiving the minimized interval of difference by setting, can effectively prevent contingent inclination between the 1st lens and the 2nd lens and eccentric light picker device with 2 to the object lens assemble method.
[description of drawings]
The optical pickup apparatus that is to use general 2 lens that Fig. 1 and Fig. 2 show is used the objective lens arrangement synoptic diagram.
Fig. 1 shows is front view (FV) to object lens.
What Fig. 2 showed is run-off the straight and the eccentric front view (FV) to object lens.
Fig. 3 shows is that the optical pickup apparatus of one embodiment of the present of invention uses the determinator to using in the object lens assemble method to constitute concept map.
Fig. 4 and Fig. 5 show is the optical pickup apparatus of one embodiment of the present of invention synoptic diagram to each step of object lens assemble method.
What Fig. 4 showed is the concept map of the 2nd entirety of lens package step.
What Fig. 5 showed is the concept map of the 1st entirety of lens package step.
[embodiment]
Below with reference to accompanying drawings embodiments of the invention are elaborated.
In order not influence main points of the present invention, omitted for specifying of well-known performance and formation thereof among the present invention.And, identical or have identical part for the formation of discussing with the front, all use identical reference marks to represent.And, also omit about these detailed description.
Fig. 3 shows is the formation concept map that the optical pickup apparatus of one embodiment of the present of invention is used the determinator that uses in the assemble method to object lens.
As shown in the figure, the optical pickup apparatus of one embodiment of the invention uses the determinator that uses in the assemble method to object lens to be made of following several parts: support the 2nd lens 102, move horizontally the 2nd horizontally moving device 240 of the 2nd lens 102; The 1st horizontally moving device 230 that the 1st lens 104 are moved at the upper level of the 2nd lens 102; The light source 215 of irradiating laser light beam; The part of light source 215 emission light beams is folded to the direction of the 1st lens 104 and the 2nd lens 102, and a part converts light source 215 emitted light beams to the collimation lens 216 of parallel beam by beam splitter 214; Can adjust the focus adjusting device 220 that shines the optical focus position of the 1st lens 104 and the 2nd lens 102 by collimation lens 216; Can measure the optical sensor 211 that the 1st lens 104 and the 2nd lens 102 reflected light form focal position.
Above-mentioned focus adjusting device 220 is made of following two parts: with the light beam of light emitted to the 1st lens 104 and 102 incidents of the 2nd lens to object lens 221; Move up and down to object lens 221 to object lens vertical moving device 222.
Above-mentioned optical sensor 211 is arranged the charge-coupled device (CCD) (CCD:Chargecoupled device) that forms by photodiode and is constituted.And charge-coupled device (CCD) is connected with portrait display device 212, can see the position that light beam focuses on.
Explanation that will be detailed in addition below to the action of determinator.
And, by moving up and down, can adjust the position of the beam focus of directive the 1st lens 104 and the 2nd lens 102 directions to object lens 221 to object lens vertical moving device 222.
Below, will use assemble method to be described in detail to the optical pickup apparatus that uses the said determination device to object lens.
What Fig. 4 and Fig. 5 showed is the synoptic diagram of optical pickup apparatus of the present invention to an embodiment of object lens assembling method step.What Fig. 4 showed is the concept map of the 2nd entirety of lens package step.What Fig. 5 showed is the concept map of the 1st entirety of lens package step.
Shown as accompanying drawing, optical pickup apparatus of the present invention uses an embodiment to the assemble method of object lens to comprise following step: use focus adjusting device, for make the reflected light of the bottom surface of the 2nd lens 102 (102a) the position of 211 li focusing of optical sensor and on the 2nd lens 102 reflected light of (102b) are same positions in the position of 211 li focusing of optical sensor, determine the position of the 2nd lens 102, and the 2nd entirety of lens package step (Fig. 4) of assembling; Finish after above-mentioned the 2nd entirety of lens package step (Fig. 4), after the 1st lens 104 are positioned over the upper position of the 2nd lens 102, use focus adjusting device 200, the reflected light of (104b) is same positions in the position of 211 li focusing of optical sensor and the reflected light of the 2nd lens 102 in the position of 211 li focusing of optical sensor in the position of 211 li focusing of optical sensor, above the 1st lens 104 to make the reflected light of the 1st lens 104 bottom surfaces (104a), determine the position of the 1st lens 104, and the 1st entirety of lens package step (Fig. 5) of assembling.
The 2nd entirety of lens package step as Fig. 4 (a) to Fig. 4 (d) lining show, vertical drive determinator 200 to object lens vertical moving device 222, to move from bottom to top object lens 221, for the reflected light that makes bottom surface (102a) and top (102b) is same positions in the position of 211 li focusing of optical sensor, move the 2nd horizontally moving device 240, adjust the inclination of the 2nd lens 102.
That is, in Fig. 4 (a), object lens 221 are in the light position that (102a) focuses in the bottom surface that makes determinator 200 to object lens 221 outgoing; In Fig. 4 (b), object lens 221 are in the position that makes light (102b) vertical incidence on the 2nd lens 102 of object lens 221 outgoing; In Fig. 4 (c), object lens 221 are in make the light of object lens 221 outgoing (102b) position of focusing in the above; In Fig. 4 (d), object lens 221 are in the position that makes light (102a) vertical incidence of object lens 221 outgoing in the bottom surface.
Therefore, among Fig. 4 (a) and Fig. 4 (d), the folded light beam of bottom surface (102a) by to object lens, incides in the optical sensor 211 once more, and in (102b), beam reflected is to other direction reflection in the above.And in Fig. 4 (b) and Fig. 4 (c), (102b) lining beam reflected by to object lens, incides optical sensor 211 once more in the above, and (102a) beam reflected is to other direction reflection in the bottom surface.
Therefore, in each step of Fig. 4, the position that focuses in optical sensor 211 for the light that makes reflection is a same point, by moving the 2nd horizontally moving device 240, adjust the inclination of the 2nd lens 102, can accurately assemble the position of the 2nd lens 102 and adjust inclination.
The 1st entirety of lens package step as from Fig. 5 (a) to Fig. 5 (e), show, vertical drive determinator 200 to object lens vertical moving device 222, to move from bottom to top object lens 221, the position that in optical sensor 211, focuses on for the reflected light of the bottom surface (104a) that makes the 1st lens and top (104b) and the bottom surface of the 2nd lens (102a) and above the position that in optical sensor 211, focuses on of the light of (102b) reflection be same point, move the 1st horizontally moving device 240, adjust the inclination of the 1st lens 104.
That is, in Fig. 5 (a), object lens 221 are in the position that the light of object lens 221 outgoing is focused in the bottom surface of the 2nd lens (102a) that makes determinator 200; In Fig. 5 (b), object lens 221 are in the position that makes emergent light (102b) vertical incidence on the 2nd lens 102 of object lens 221; In Fig. 5 (c), object lens 221 are in make the position that the emergent light of object lens is focused in the bottom surface of the 1st lens 104 (104a); In Fig. 5 (d), object lens 221 are in the position that makes emergent light (104b) vertical incidence on the 1st lens 104 of object lens 221; In Fig. 5 (e), object lens 221 are in make the emergent light of object lens 221 position in the 2nd lens 102 bottom surfaces (104a) vertical incidence.
Therefore, in Fig. 5 (a) and Fig. 5 (e), once more by object lens being incided optical sensor 211, (104b) beam reflected is to other direction reflection for 102b, 104a at other face in the folded light beam of the bottom surface of the 2nd lens 102 (102a).And in Fig. 5 (b), by object lens being incided optical sensor 211, (folded light beam 104b) is to other direction reflection for 102a, 104a at other face once more for (102b) beam reflected on the 2nd lens.And, in Fig. 5 (c), once more by object lens being incided optical sensor 211, in Fig. 5 (d), (104b) beam reflected is once more by inciding optical sensor 211 to object lens on the 1st lens (104) in the folded light beam of the bottom surface of the 1st lens (104) (104a).
Therefore, identical for the position that the light that reflects in each step of Fig. 5 is focused in optical sensor 211, by moving the 1st horizontally moving device 230, adjust the inclination of the 1st lens 104, accurately assemble the position of the 1st lens 104 and adjust.
As a same reason, it is irrelevant with the foozle of 2 lens self that optical pickup apparatus of the present invention is used the assemble method to object lens, receives the minimized interval of difference realization by setting, and can effectively prevent contingent inclination and off-centre between the 1st lens and the 2nd lens.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
Claims (5)
1, optical pickup apparatus uses the determinator that uses in the assemble method to object lens to comprise:
Support the 2nd lens, and the 2nd horizontally moving device that the 2nd lens are moved horizontally;
The 1st horizontally moving device that the 1st lens are moved at the upper level of the 2nd lens;
The light source of irradiating laser light beam;
The Beam Transformation of light source irradiation is become the collimation lens of parallel beam;
To be mapped to by the illumination of collimation lens the 1st lens and the 2nd lens to object lens;
Move up and down to object lens to object lens vertical moving device;
The light of the 1st lens and the 2nd reflection from lens forms the position that focuses on by to object lens and collimation lens, can measure the optical sensor of the position of light focusing.
2, the optical pickup apparatus according to claim 1 determinator that uses in the assemble method to object lens is characterized in that:
Above-mentioned optical sensor is arranged the charge-coupled device (CCD) that forms by photodiode and is constituted.
3, the optical pickup apparatus according to claim 1 determinator that uses in the assemble method to object lens is characterized in that:
Between optical sensor and collimation lens, be provided with by connecting the orifice plate that aperture forms.
4, the assemble method of optical pickup apparatus to object lens comprises following step:
Use comprises the determinator that reflects and measure the optical sensor of reflected light position to the radiative light source of lens, with source emissioning light, for the light that makes light emitted is same position in the position that the reflected light of the 2nd lens bottom surface and reflected light on the 2nd lens focus in optical sensor, determine the position of the 2nd lens, and the 2nd entirety of lens package step of assembling;
Finish after above-mentioned the 2nd entirety of lens package step, the 1st lens are positioned over the 2nd lens upper position, use focus adjusting device, the position that focuses in optical sensor for the reflected light of the reflected light that makes the 1st lens bottom surface, reflected light above the 1st lens and the 2nd lens is a same position, determines the 1st entirety of lens package step of the 1st lens position and assembling.
5, the assemble method of optical pickup apparatus according to claim 4 to object lens is characterized in that:
Above-mentioned optical sensor is arranged the charge-coupled device (CCD) that forms by photodiode and is constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054351 CN1747014A (en) | 2004-09-08 | 2004-09-08 | Objective lens package of optical picker and its sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054351 CN1747014A (en) | 2004-09-08 | 2004-09-08 | Objective lens package of optical picker and its sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN1747014A true CN1747014A (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410054351 Pending CN1747014A (en) | 2004-09-08 | 2004-09-08 | Objective lens package of optical picker and its sensing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987456A (en) * | 2021-05-10 | 2021-06-18 | 江苏米创医疗科技有限公司 | LED multispectral light source and implementation method thereof |
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2004
- 2004-09-08 CN CN 200410054351 patent/CN1747014A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987456A (en) * | 2021-05-10 | 2021-06-18 | 江苏米创医疗科技有限公司 | LED multispectral light source and implementation method thereof |
| CN112987456B (en) * | 2021-05-10 | 2021-09-07 | 江苏米创医疗科技有限公司 | Multispectral illumination method applied to minimally invasive surgery LED light source |
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